CN106636581A - Salt bath treatment method and equipment for wire rod for 1960 MPa and above bridge cable zinc-coated steel wire - Google Patents
Salt bath treatment method and equipment for wire rod for 1960 MPa and above bridge cable zinc-coated steel wire Download PDFInfo
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- CN106636581A CN106636581A CN201611080447.XA CN201611080447A CN106636581A CN 106636581 A CN106636581 A CN 106636581A CN 201611080447 A CN201611080447 A CN 201611080447A CN 106636581 A CN106636581 A CN 106636581A
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- wire rod
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- salt bath
- bridge cable
- 1960mpa
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- 150000003839 salts Chemical class 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 19
- 239000011701 zinc Substances 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 title abstract description 14
- 239000010959 steel Substances 0.000 title abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 12
- 230000000171 quenching effect Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 21
- 210000005056 cell body Anatomy 0.000 claims description 19
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 17
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 14
- 238000003672 processing method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 10
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 8
- 235000010333 potassium nitrate Nutrition 0.000 claims description 8
- 239000004323 potassium nitrate Substances 0.000 claims description 8
- 235000010344 sodium nitrate Nutrition 0.000 claims description 8
- 239000004317 sodium nitrate Substances 0.000 claims description 8
- AZFNGPAYDKGCRB-XCPIVNJJSA-M [(1s,2s)-2-amino-1,2-diphenylethyl]-(4-methylphenyl)sulfonylazanide;chlororuthenium(1+);1-methyl-4-propan-2-ylbenzene Chemical compound [Ru+]Cl.CC(C)C1=CC=C(C)C=C1.C1=CC(C)=CC=C1S(=O)(=O)[N-][C@@H](C=1C=CC=CC=1)[C@@H](N)C1=CC=CC=C1 AZFNGPAYDKGCRB-XCPIVNJJSA-M 0.000 claims description 7
- 235000010289 potassium nitrite Nutrition 0.000 claims description 7
- 239000004304 potassium nitrite Substances 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 238000005242 forging Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000004320 controlled atmosphere Methods 0.000 claims description 2
- BXNHTSHTPBPRFX-UHFFFAOYSA-M potassium nitrite Chemical compound [K+].[O-]N=O BXNHTSHTPBPRFX-UHFFFAOYSA-M 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 abstract description 3
- 238000005485 electric heating Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 235000007686 potassium Nutrition 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention provides a salt bath treatment method and equipment for a wire rod for a 1960 MPa and above bridge cable zinc-coated steel wire. The method comprises the following steps that (a), the wire rod is uncoiled and paid off; (b), the wire rod is austenitized; (c), isothermal salt bath quenching is conducted; and (d), the wire rod is taken up. The strength fluctuation of the wire rod treated through the method is controlled to be from minus 15 MPa to 15 MPa, network carbide and martensite bands in the center are removed, and the whole wire rod texture and performance are even. The equipment comprises a trough body and a trough cover, wire guide rollers are installed on the left side and the right side of the trough cover, an electric heating device for adjusting temperatures, a cooling pipe and a plurality sets of stirring devices for stirring a quenching medium are installed at the bottom of the side wall of the trough body, and flow guiding grooves are formed in the bottom of the slat bath trough. The slat bath treating equipment is suitable for simultaneous salt bath treatment of multiple wire rods, the integral structure is reasonable in design, installation of flow guiding grooves and stirring devices effectively ensures controllability and uniformity of the medium in the trough body.
Description
Technical field
The invention belongs to metal wire rod manufacture and material heat treatment field, more particularly to a kind of 1960MPa and with higher level's bridge
Beam cable zinc-coated wire wire rod salt bath processing method and salt bath processing equipment.
Background technology
In recent years with the demand of our national economic developments, traffic base builds more and more prosperous, super-span suspension bridge beam
Quantity rapidly increases.With the increase of span and track quantity, the main push-towing rope steel wire of domestic and international suspension bridge is sent out in superhigh intensity
In the exhibition stage, improving constantly the tensile strength of steel wire becomes the development trend of bridge cable.The tensile strength of bridge main push-towing rope steel wire compared with
Long-time is maintained between 1570 MPa～1670MPa, 1770MPa and 1860MPa ranks were moved quickly through in recent years,
1960MPa～2000MPa levels become the developing direction of current world's bridge main push-towing rope steel wire.
At present zinc-coated wire wire rod component system and manufacture method can only meet 1860MPa rank bridge cable galvanized steels
The production of silk wire rod, such as CN2012101325872.With the further raising of intensity requirement, twisting property is reduced, air-cooled work
The impact of same circle tissue, performance difference that skill is brought is also further obvious.Therefore on the basis of component system adjustment, to hot rolling disk
The method of strip adoption Isothermal treatment be produce 1960 MPa ~ 2100MPa level bridge cable zinc-coated wire wire rods must Jing it
Road.
Isothermal processes are divided into online and offline two kinds, and with Nippon Steel's DLP techniques as representative, rolling is completed burning optimization on line
Afterwards, high temperature wire rod is directly entered double salt baths and is heat-treated, and the sorbite group of uniformity is obtained by controlling phase transition temperature
Knit, the technique needs to carry out current production line larger change, invests huge.Heat-treated offline be then with lead bath as representative etc.
Warm handling process, it is contemplated that the aspect such as environmental protection and workers ' health, lead bath is processed will be on the verge of being replaced.Lack at present one kind can with it is existing
There is equipment to use cooperatively and free of contamination isothermal heat treatment process, to effectively improve the strong of grade bridge cable zinc-coated wire wire rod
Degree.
The content of the invention
The present invention is directed to above-mentioned technical problem, proposes a kind of 1960MPa and with higher level's bridge cable zinc-coated wire disk
Bar salt bath processing method, and suitable for the salt bath processing equipment of the method.The method by the way of offline production, with without dirt
Dye, zero-emission isothermal salt made from earth containing a comparatively high percentage of sodium chloride bath be hardening media, Isothermal treatment is carried out to the gren rod of Gao Xian factories, can produce with
1960MPa～2100MPa level bridge cable zinc-coated wire wire rods are the high-quality high-carbon steel wire rod of representative, are taken into account economical and environmentally friendly
Value.
In order to achieve the above object, the technical solution used in the present invention is：
A kind of 1960MPa and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, comprises the following steps, a wire rods
Uncoiling unwrapping wire；B wire rods are heated at 850 DEG C -1050 DEG C and are incubated 7min-18min carries out austenitizing；Wire rod is passed through salt by c
Bath carries out isothermal salt bath quenching at 500 DEG C -600 DEG C, and the hardening media is potassium nitrate, sodium nitrate, potassium nitrite, nitrous
Two or more in sour sodium；D wire rod take-ups.
Preferably, also processing including the removal of wire rod scale on surface between step a and step b.
Preferably, also include wire rod surface cleaning step between step c and step d, using 27 DEG C -50 DEG C of temperature
Water carry out surface clean to the wire rod after quenching, cleaning is divided into three-level, and the wire rod temperature control after third level cleaning is 350
℃-450℃。
Preferably, austenitizing is electrically heated or gas fired radiant tubes heating using controlled atmosphere heating furnace in step b.
Preferably, the hardening media is to be made up of three kinds in sodium nitrate, potassium nitrate, natrium nitrosum and potassium nitrite
Molten state salt made from earth containing a comparatively high percentage of sodium chloride, and suitable quantity of water is added according to the actual cooling velocity of wire rod.
Preferably, being welded to connect next reel winding, joint table by double forging and stamping bonding machines in unwrapping wire end per reel bar
Face Welded Joints and neighbouring position Jing after polishing carry out multiple temper, prevent from being ruptured during heat treatment and take-up.
The present invention also proposes a kind of wire rod salt bath processing equipment, including cell body and groove lid, the cell body and groove lid or so two
Side is mounted on Wire guide roller, and the cell body sidewall bottom is provided with electric heater and cooling tube for adjusting temperature and multigroup stirs
The agitator of hardening media is mixed, the salt bath bottom land is provided with guiding gutter
Preferably, two or more structures being contained with the cell body in potassium nitrate, sodium nitrate, potassium nitrite, natrium nitrosum
Into hardening media.
Preferably, the groove lid top is provided with the hoisting mechanism of lifting groove lid.
Preferably, the cell body and groove lid are provided with the heat-insulation layer of refractory fibre composition.
Compared with prior art, advantages of the present invention and good effect are：
1st, wire rod salt bath processing method of the present invention, can produce 1960MPa～2100MPa level bridge cable zinc-coated wires
With the high-end heat treatment wire rod such as gren rod, high-strength cord steel, cutting wire steel, spring steel wire rod.Wire rod is strong Jing after processing
Degree undulated control eliminates the net carbide and martensite belt of center portion in ± 15Mpa, and wire rod poker tissue and performance are uniform.
2nd, salt bath processing equipment is adapted to multiply wire rod carries out salt bath process simultaneously, overall construction design rationally, guiding gutter and
The setting of agitator effectively ensure that the controllability and uniformity of groove in-vivo medium.
Description of the drawings
Fig. 1 is sorbite tissue micrograph after the wire rod salt bath of salt bath processing method of the present invention is heat-treated；
Fig. 2 is the front sectional view of salt bath processing equipment of the present invention；
Fig. 3 is the overlooking the structure diagram of salt bath processing equipment of the present invention；
Above in each figure：1st, cell body；2nd, groove lid；3rd, heat-insulation layer；4th, hoisting mechanism；5th, Wire guide roller；6th, wire rod；7th, electric heater；
8th, cooling tube；9th, guiding gutter；10th, agitator.
Specific embodiment
In order to be better understood from the present invention, illustrate with reference to the accompanying drawings and examples.
Embodiment one：A kind of 1960MPa and with higher level's bridge cable zinc-coated wire wire rod（QWTP）Salt bath processing method,
Mainly include the following steps that, a wire rod uncoiling unwrapping wire；The removal of a1 wire rod scale on surface is processed；B wire rods heat austenitizing；c
Wire rod isothermal salt bath quenching；C1 wire rod surface cleans；D wire rod take-ups.
a：Wire rod uncoiling unwrapping wire
The specification of wire rod between 5.5-16mm, the diameter 13-16mm wire rods that the present embodiment is made of a steel using bridge cable.Disk
Bar uncoiling unwrapping wire adopts vertical or horizontal pay-off machine, multiple paying out machines to be arranged in parallel in two separate ranks, and after every frame paying out machine wire is arranged
And smoothing roll, make multiply wire rod at regular intervals（Such as 10cm）Parallel lines enters heating furnace.Payingoff speed is controlled in 1.5-
5.0m/min.Pay off rack floor installation damping due to rotation, prevents uncoiling process from producing because of inertia effects.Per reel bar at unwrapping wire end
End, by double forging and stamping bonding machines next reel winding is welded to connect.Welding is using double forging and stamping bonding machines, joint surface sand after welding
Wheel polishing, Welded Joints and neighbouring position carry out multiple temper after polishing, prevent wire rod in heat treatment and take-up process
Middle fracture.
a1：The removal of wire rod scale on surface is processed
The process can be carried out also online offline.Carrying out dephosphorization offline can be using mechanical descaling machine, after wire rod mechanical descaling
Collect on coil holder, collected and directly can be heat-treated coil holder band wire rod handling on pay off rack after a roll.Online dephosphorization
Using mechanical ball blast mode, concentration Shot Blasting is carried out to the wire rod after parallel 16-24 stock unwrapping wire side by side, by reasonably setting
The spray angle of spacing and shot-blasting machine between meter is per share is optimizing the effect of mechanical descaling.The present embodiment adopts online iron sheet
Handling process is removed, is coordinated with paying out machine, multiply wire rod surface oxide layer is removed while can be efficiently quick.
b：Wire rod heats austenitizing
Using electrical heating or gas fired radiant tubes mode of heating, methyl alcohol, natural gas and nitrogen etc. are led in heating furnace and forms reproducibility gas
Atmosphere, prevents the wire rod surface after de-scaling from producing iron scale and depth decarburization again.Metallic channel is set in heating furnace burner hearth, it is ensured that
The wire rod of parallel entrance heating furnace is walked in respective metallic channel, is prevented from mutually knotting and is caused to stop.Metallic channel adopts fire resisting
Material, surface is smooth in case major structure is into wire rod surface defect.1050 DEG C of heating furnace rated temperature, thermal evenness controlling is ± 3
DEG C, heating furnace temperature-controlled precision ± 1 DEG C.Coordinate take-up speed, make the wire rod heating and thermal insulation time be 7-18min.
c：Wire rod isothermal salt bath quenching
Salt bath quenching is carried out to the wire rod after austenitizing using the salt bath processing equipment described in embodiment two, hardening media is nitre
Two or more salt allotments in sour potassium, sodium nitrate, potassium nitrite, natrium nitrosum are formed, and the present embodiment adopts potassium nitrate 50wt%
With and natrium nitrosum 50wt%.The temperature range of isothermal salt bath is 500-600 DEG C.
c1：Wire rod surface clean
Surface clean is carried out to the wire rod after quenching using the water of temperature 27-50 DEG C, cleaning is divided into three-level cleaning, every by control
The cleaning water pressure of one-level is controlling cleaning performance and wire rod temperature drop.Wire rod temperature control after third level cleaning is in 350-450
In the range of DEG C, prevent wire rod Quench and produce residual stress, prevent the winding of later stage wire rod from bringing difficulty.
d：Wire rod take-up
It is collected using vertical winding machine plus the vertical bar to having processed, take-up speed control range is collected in 1.5-5m/min
Coiling internal diameter 900mm afterwards, external diameter 1350mm.
Using using the wire rod salt bath processing method described in the present embodiment, 1960MPa～2100MPa level bridges can be produced
The high-end heat treatment wire rod such as cable zinc-coated wire gren rod, high-strength cord steel, cutting wire steel, spring steel wire rod.Through
The strength fluctuation of wire rod is controlled in ± 15Mpa after process, eliminates the net carbide and martensite belt of center portion, sorbitic rate
More than 95%, within sorbite sheet interlayer spacing 100nm can be reached（As described in Figure 1）.Wire rod poker is organized and performance is uniform, non-
Often suitable deep processing enterprise carries out high-end and deep drawing steel wire production.
Embodiment two：
The present embodiment proposes a kind of wire rod salt bath processing equipment, as shown in Figures 2 and 3, including rectangle cell body 1 and plate shaped groove
Two or more quenchings for constituting being contained with lid 2, the cell body 1 in potassium nitrate, sodium nitrate, potassium nitrite, natrium nitrosum
Medium.The top of the groove lid 2 is provided with the hoisting mechanism 4 that can lift or cover groove lid 2, and the present embodiment adopts sprocket wheel and chain,
Jing motor-drivens are realized.The lifting that telescopic cylinder realizes groove lid 2 may also be employed.
It is defined by orientation shown in accompanying drawing, the left side of cell body 1 is the entrance of wire rod 6, and right side exports for wire rod 6.The cell body 1 or so
Two side top is mounted on Wire guide roller 5, and the bottom of groove lid 2 is provided with two groups of downward Wire guide rollers 5, four groups of Wire guide rollers 5 ensure by
Heating furnace wire rod out keeping parallelism state when hardening media, prevents from knotting or abrades.In addition, Wire guide roller 5 in groove lid 2
Installation site ensure that the wire rod 6 after austenitizing is immersed in salt bath medium in the 30s.
To realize isothermal salt bath, the sidewall bottom of the cell body 1 is provided with electric heater 7, cooling tube 8 for adjusting temperature
And the agitator 10 of multigroup stirring hardening media, the salt bath bottom land is provided with guiding gutter 9.Can be in the cooling tube 8
Cooling water can also be air, by cooling medium in the operation of PLC automatic controlled electric heater 7 and cooling tube 8
Conveying, realizes the constant temperature of salt bath, and salt temperature fluctuation range is at ± 2 DEG C.In order to ensure the controllable of hardening media temperature in salt bath
Property and uniformity, control temperature fluctuation range, as shown in figure 3, the bottom of cell body 1 is provided with multiple guiding gutters 9, the one end of guiding gutter 9
Agitator 10 is installed.When agitator 10 is opened, hardening media flows along the direction of guiding gutter 9, and the flow field of formation can guarantee that in groove
The temperature homogeneity of salt bath.The cell body 1 and groove lid 2 are provided with the heat-insulation layer 3 of refractory fibre composition, are dissipated with reducing heat
Lose, energy saving.
Salt bath processing equipment described in the present embodiment is adapted to multiply wire rod carries out salt bath process simultaneously, and overall construction design is closed
Reason, the setting of guiding gutter 9 and agitator 10 effectively ensure that the controllability and uniformity of medium in cell body 1.
The above, is only presently preferred embodiments of the present invention, is not the restriction for making other forms to the present invention, is appointed
What those skilled in the art changed possibly also with the technology contents of the disclosure above or be modified as equivalent variations etc.
Effect embodiment is applied to other fields, but every without departing from technical solution of the present invention content, according to the technical spirit of the present invention
Any simple modification, equivalent variations and the remodeling made to above example, still falls within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of 1960MPa and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, it is characterised in that：Including with
Lower step, a wire rod uncoiling unwrapping wire；B wire rods are heated at 850 DEG C -1050 DEG C and are incubated 7min-18min carries out austenitizing；c
Wire rod is carried out into isothermal salt bath quenching by salt bath at 500 DEG C -600 DEG C, the hardening media be potassium nitrate, sodium nitrate,
Two or more in potassium nitrite, natrium nitrosum；D wire rod take-ups.
2. 1960MPa according to claim 1 and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, its
It is characterised by：Also include step a1 between step a and step b, the removal of wire rod scale on surface is processed.
3. 1960MPa according to claim 1 and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, its
It is characterised by：Also include step c1, wire rod surface clean step, using 27 DEG C -50 DEG C of temperature between step c and step d
Water carries out surface clean to the wire rod after quenching, and cleaning is divided into three-level, the wire rod temperature control after third level cleaning 350 DEG C-
450℃。
4. 1960MPa according to Claims 2 or 3 and with higher level's bridge cable zinc-coated wire wire rod salt bath process side
Method, it is characterised in that：Austenitizing is electrically heated or gas fired radiant tubes heating using controlled atmosphere heating furnace in step b.
5. 1960MPa according to claim 1 and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, its
It is characterised by：The hardening media is by three kinds of molten states for constituting in sodium nitrate, potassium nitrate, natrium nitrosum and potassium nitrite
Salt made from earth containing a comparatively high percentage of sodium chloride, and suitable quantity of water is added according to the actual cooling velocity of wire rod.
6. 1960MPa according to claim 4 and with higher level's bridge cable zinc-coated wire wire rod salt bath processing method, its
It is characterised by：Per reel bar in unwrapping wire end, by double forging and stamping bonding machines next reel winding, joint surface Jing polishings are welded to connect
Afterwards Welded Joints and neighbouring position carry out multiple temper, prevent from being ruptured during heat treatment and take-up.
7. a kind of wire rod salt bath processing equipment, including cell body and groove lid, it is characterised in that：The cell body and the groove lid left and right sides are equal
Wire guide roller is installed, the cell body sidewall bottom is provided with electric heater, cooling tube and multigroup stirring for adjusting temperature and quenches
The agitator of fiery medium, the salt bath bottom land is provided with guiding gutter.
8. wire rod salt bath processing equipment according to claim 7, it is characterised in that：Be contained with the cell body potassium nitrate,
Two or more hardening medias for constituting in sodium nitrate, potassium nitrite, natrium nitrosum.
9. according to claim 7, it is characterised in that：The groove lid top is provided with the hoisting mechanism of lifting groove lid.
10. according to claim 7, it is characterised in that：The cell body and groove lid are provided with the guarantor of refractory fibre composition
Warm layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080447.XA CN106636581A (en) | 2016-11-30 | 2016-11-30 | Salt bath treatment method and equipment for wire rod for 1960 MPa and above bridge cable zinc-coated steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080447.XA CN106636581A (en) | 2016-11-30 | 2016-11-30 | Salt bath treatment method and equipment for wire rod for 1960 MPa and above bridge cable zinc-coated steel wire |
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| CN107254568A (en) * | 2017-05-23 | 2017-10-17 | 北京勤泽鸿翔冶金科技有限公司 | The offline production method of high-carbon steel wire rod |
| CN108103282A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of wire rod heat-treatment technology method |
| CN108607885A (en) * | 2017-08-22 | 2018-10-02 | 武汉钢铁有限公司 | Continuous processing technique before a kind of wire drawing of big specification bridge Suo Gang gren rods |
| CN109290387A (en) * | 2018-08-21 | 2019-02-01 | 浙锚科技股份有限公司 | A kind of high strength steel strand technique |
| CN109554631A (en) * | 2017-09-26 | 2019-04-02 | 宝山钢铁股份有限公司 | A kind of low-alloy steel and steel wire prepared therefrom processing High-strength high-plasticity wire rod |
| CN109943697A (en) * | 2019-04-10 | 2019-06-28 | 东北大学 | A kind of heat treatment process of cutting steel wire steel C104Cr |
| CN110172562A (en) * | 2019-06-25 | 2019-08-27 | 江苏宝钢精密钢丝有限公司 | A kind of online salt bath heat treatment method of steel wire multifibres |
| CN111560510A (en) * | 2020-04-23 | 2020-08-21 | 中国重型机械研究院股份公司 | Steel pipe heat treatment quenching method |
| CN115679082A (en) * | 2022-11-09 | 2023-02-03 | 强芯科技(南通)有限公司 | Production process of brass alloy carbon steel wire |
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| CN107254568A (en) * | 2017-05-23 | 2017-10-17 | 北京勤泽鸿翔冶金科技有限公司 | The offline production method of high-carbon steel wire rod |
| CN108607885A (en) * | 2017-08-22 | 2018-10-02 | 武汉钢铁有限公司 | Continuous processing technique before a kind of wire drawing of big specification bridge Suo Gang gren rods |
| CN109554631A (en) * | 2017-09-26 | 2019-04-02 | 宝山钢铁股份有限公司 | A kind of low-alloy steel and steel wire prepared therefrom processing High-strength high-plasticity wire rod |
| CN109554631B (en) * | 2017-09-26 | 2021-08-17 | 宝山钢铁股份有限公司 | Low alloy steel and high-strength high-plasticity wire rod prepared from same and used for processing steel wire |
| CN108103282A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of wire rod heat-treatment technology method |
| CN109290387A (en) * | 2018-08-21 | 2019-02-01 | 浙锚科技股份有限公司 | A kind of high strength steel strand technique |
| CN109943697A (en) * | 2019-04-10 | 2019-06-28 | 东北大学 | A kind of heat treatment process of cutting steel wire steel C104Cr |
| CN110172562A (en) * | 2019-06-25 | 2019-08-27 | 江苏宝钢精密钢丝有限公司 | A kind of online salt bath heat treatment method of steel wire multifibres |
| CN111560510A (en) * | 2020-04-23 | 2020-08-21 | 中国重型机械研究院股份公司 | Steel pipe heat treatment quenching method |
| CN115679082A (en) * | 2022-11-09 | 2023-02-03 | 强芯科技(南通)有限公司 | Production process of brass alloy carbon steel wire |
| CN115679082B (en) * | 2022-11-09 | 2025-02-14 | 强芯科技(南通)有限公司 | A production process of brass alloy carbon steel wire |
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