CN105499835A - Welding material and welding method for repairing straightening rolls of hot-rolling separators - Google Patents
Welding material and welding method for repairing straightening rolls of hot-rolling separators Download PDFInfo
- Publication number
- CN105499835A CN105499835A CN201610099802.1A CN201610099802A CN105499835A CN 105499835 A CN105499835 A CN 105499835A CN 201610099802 A CN201610099802 A CN 201610099802A CN 105499835 A CN105499835 A CN 105499835A
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- Prior art keywords
- welding
- weight
- repairing
- percentage
- smoothing roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000005098 hot rolling Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 23
- 239000000126 substance Substances 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000009499 grossing Methods 0.000 claims description 27
- 239000010410 layer Substances 0.000 claims description 14
- 230000004907 flux Effects 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000011229 interlayer Substances 0.000 claims description 8
- 229910000679 solder Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a welding material for repairing straightening rolls of hot-rolling separators. Welding wires for transition layers comprise, by weight, 0.02%-0.08% of C, 0.1%-0.6% of Si, 1%-3% of Mn, 11%-15% of Cr, 0.5%-2.5% of Mo, 1%-4% of Ni, 0.1%-0.5% of V and the balance Fe, and the sum of the weight percentages of various chemical components of the welding wires is 100%; welding wires for abrasion-resistant layers comprise, by weight, 0.5%-0.8% of C, 0.1%-0.6% of Si, 2%-4% of Mn, 4%-8% of Cr, 1%-4% of Mo, 4%-7% of W, 0.2%-0.5% of V and the balance Fe, and the sum of the weight percentages of various chemical components of the welding wires is 100%. The welding material has the advantages that the straightening rolls of the hot-rolling separators can be successfully repaired by the welding material, performance requirements of normal work can be met by the repaired straightening rolls, a shortcut can be provided for repairing waste and utilizing old facilities of steel mills, the service lives of the straightening rolls of the hot-rolling separators can be prolonged, the cost can be lowered, and capital can be saved.
Description
Technical field
The present invention relates to welding technology field, particularly relating to a kind of welding material for repairing hot rolling reel smoothing roll and welding method.
Background technology
Hot rolling reel smoothing roll reaches last footpath through Long-Time Service, can not continue to use.Quality of parent material due to reel smoothing roll is SUJ II, and carbon equivalent is very high, very easily occurs the weld defects such as crackle during welding; And, the roll surface working lining hardness of this smoothing roll is higher, reach HRC60 ± 2, also very high to the performance requirement of roll surface, conventional welding method is difficult to make overlay cladding reach hardness and the serviceability requirement of mother metal, and its difficulty of repairing is very large, and the success rate of reparation is very low, so hot rolling mill is mainly to purchase new product, uses footpath, work end and namely scrap.
Application number be 201010618648.7 patent document disclose a kind of medication core welding wire built-up welding and repair the method for flattener backing roll.The method is the Bead weld repair for flattener backing roll, and mother metal is 50CrMnMo or 60CrMnMo.The hardness of the welding material adopted can reach HRC52 ~ 54, meets the job requirement of flattener backing roll, but can not reach the job requirement of reel smoothing roll.
Summary of the invention
The object of this invention is to provide a kind of welding material for repairing hot rolling reel smoothing roll and welding method, the successful reparation of reel smoothing roll can be realized, repair useless reusing for steel mill and provide a shortcut, for enterprise has saved fund.
For achieving the above object, the present invention realizes by the following technical solutions:
A kind of welding material for repairing hot rolling reel smoothing roll, component of weld wire percentage by weight for transition zone is: C0.02%-0.08%, Si0.1%-0.6%, Mn1%-3%, Cr11%-15%, Mo0.5%-2.5%, Ni1%-4%, V0.1%-0.5%, all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%; Component of weld wire percentage by weight for wearing layer is: C0.5%-0.8%, Si0.1%-0.6%, Mn2%-4%, Cr4%-8%, Mo1%-4%, W4%-7%, V0.2%-0.5%, and all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%.
The flux material that described transition zone and wearing layer adopt is F308-H0Cr21Ni10 solder flux.
Hot rolling reel smoothing roll is carried out to a method for REPAIR WELDING, comprises following method:
1) welding condition: welding wire specification Φ 3.2, speed of welding: 300-400mm/min, electric current: 300-500A, voltage: 25-35V, electrode extension: 15-40mm, eccentric throw 30mm, amount of lap 30-60mm, interlayer temperature 400-450 DEG C;
2) weld preheating: material carbon equivalent is high, tendency of hardenability is large, must carry out the pre-heat treatment.Rise to 400 DEG C with the programming rate of 50 DEG C/h, be incubated 6 hours;
3) in order to ensure interlayer temperature and welding uniformity, welding process is carried out in temperature automatically controlled bell furnace, and carries out expedite circumference rotation;
4) post weld heat treatment: in order to reduce welding stress as much as possible, adjustment postwelding tissue and hardness, need to carry out finished heat treatment.Rise to 550-600 DEG C with the programming rate of 50 DEG C/h, be incubated 10 hours, cool with stove.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of welding material for repairing hot rolling reel smoothing roll and welding method, the successful reparation of reel smoothing roll can be realized, the smoothing roll after reparation is enable to reach the performance requirement required for normally working, repair useless reusing for steel mill and provide a shortcut, effectively extend the service life of hot rolling reel smoothing roll, for enterprise reduces cost, saved fund.
Detailed description of the invention
Below in conjunction with specific embodiment, embodiments of the present invention are further illustrated:
A kind of welding material for repairing hot rolling reel smoothing roll, component of weld wire percentage by weight for transition zone is: C0.02%-0.08%, Si0.1%-0.6%, Mn1%-3%, Cr11%-15%, Mo0.5%-2.5%, Ni1%-4%, V0.1%-0.5%, all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%; Component of weld wire percentage by weight for wearing layer is: C0.5%-0.8%, Si0.1%-0.6%, Mn2%-4%, Cr4%-8%, Mo1%-4%, W4%-7%, V0.2%-0.5%, and all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%.
The flux material that described transition zone and wearing layer adopt is F308-H0Cr21Ni10 solder flux.The solder flux trade mark is: SJ612.
Hot rolling reel smoothing roll is carried out to a method for REPAIR WELDING, comprises following method:
1) welding condition: welding wire specification Φ 3.2, speed of welding: 300-400mm/min, electric current: 300-500A, voltage: 25-35V, electrode extension: 15-40mm, eccentric throw 30mm, amount of lap 30-60mm, interlayer temperature 400-450 DEG C;
2) weld preheating: mother metal carbon equivalent is high, tendency of hardenability is large, must carry out the pre-heat treatment.Rise to 400 DEG C with the programming rate of 50 DEG C/h, be incubated 6 hours;
3) in order to ensure interlayer temperature and welding uniformity, welding process is carried out in temperature automatically controlled bell furnace, and carries out expedite circumference rotation;
4) post weld heat treatment: in order to reduce welding stress as much as possible, adjustment postwelding tissue and hardness, need to carry out finished heat treatment.Rise to 550-600 DEG C with the programming rate of 50 DEG C/h, be incubated 10 hours, cool with stove.
The duty of hot rolling reel smoothing roll is cold rectifying, align under normal temperature, be different from high-temperature straightening, very high to the working face requirement of strength of smoothing roll, therefore the quality of parent material of reel smoothing roll is SUJ II, its working lining hardness is HRC60 ± 2, the welding material of weld seam wearing layer of the present invention and the control to welding process, weld seam wearing layer hardness can be made to reach HRC60 ± 2, with mother metal working lining, there is equal mechanical property.The welding material of weld seam transition zone of the present invention and the control to welding process, effectively can control the uniformity of weld seam, prevent the generation of crackle, improves wearability, the corrosion resistance of weld seam.The hot rolling reel smoothing roll after Bead weld repair is made to meet need of production.
Embodiment 1:
For repairing a welding material for hot rolling reel smoothing roll, the component of weld wire percentage by weight for transition zone is: C0.02%, Si0.4%, Mn1.5%, Cr11%, Mo0.6%, Ni1%, V0.1%, all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%; Component of weld wire percentage by weight for wearing layer is: C0.56%, Si0.1%, Mn2%, Cr4%, Mo1%, W4%, V0.2%, and all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%.
The flux material that described transition zone and wearing layer adopt is F308-H0Cr21Ni10 solder flux.
Hot rolling reel smoothing roll is carried out to the method for REPAIR WELDING, comprises following method:
1) welding condition: welding wire specification Φ 3.2, speed of welding: 300-400mm/min, electric current: 300-500A, voltage: 25-35V, electrode extension: 15-40mm, eccentric throw 30mm, amount of lap 30-60mm, interlayer temperature 400-450 DEG C;
2) weld preheating: mother metal carbon equivalent is high, tendency of hardenability is large, must carry out the pre-heat treatment.Rise to 400 DEG C with the programming rate of 50 DEG C/h, be incubated 6 hours;
3) in order to ensure interlayer temperature and welding uniformity, welding process is carried out in temperature automatically controlled bell furnace, and carries out expedite circumference rotation;
4) post weld heat treatment: in order to reduce welding stress as much as possible, adjustment postwelding tissue and hardness, need to carry out finished heat treatment.Rise to 550-600 DEG C with the programming rate of 50 DEG C/h, be incubated 10 hours, cool with stove.
Build-up wear-resistant layer (i.e. roll surface working lining) hardness HRC60 ± 2.
Embodiment 2:
For repairing a welding material for hot rolling reel smoothing roll, the component of weld wire percentage by weight for transition zone is: C0.08%, Si0.6%, Mn3%, Cr15%, Mo2.5%, Ni4%, V0.5%, all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%; Component of weld wire percentage by weight for wearing layer is: C0.8%, Si0.2%, Mn4%, Cr8%, Mo4%, W7%, V0.5%, and all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%.
The flux material that described transition zone and wearing layer adopt is F308-H0Cr21Ni10 solder flux.
Hot rolling reel smoothing roll is carried out to the method for REPAIR WELDING with reference to embodiment 1.Build-up wear-resistant layer (i.e. roll surface working lining) hardness HRC60 ± 2.
Claims (3)
1. one kind for repairing the welding material of hot rolling reel smoothing roll, it is characterized in that, component of weld wire percentage by weight for transition zone is: C0.02%-0.08%, Si0.1%-0.6%, Mn1%-3%, Cr11%-15%, Mo0.5%-2.5%, Ni1%-4%, V0.1%-0.5%, all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%; Component of weld wire percentage by weight for wearing layer is: C0.5%-0.8%, Si0.1%-0.6%, Mn2%-4%, Cr4%-8%, Mo1%-4%, W4%-7%, V0.2%-0.5%, and all the other are Fe, and the percentage by weight summation of each chemical analysis is 100%.
2. a kind of welding material for repairing hot rolling reel smoothing roll according to claim 1, is characterized in that, the flux material that described transition zone and wearing layer adopt is F308-H0Cr21Ni10 solder flux.
3. adopt welding material as claimed in claim 1 hot rolling reel smoothing roll to be carried out to a method for REPAIR WELDING, it is characterized in that, comprise following method:
1) welding condition: welding wire specification Φ 3.2, speed of welding: 300-400mm/min, electric current: 300-500A, voltage: 25-35V, electrode extension: 15-40mm, eccentric throw 30mm, amount of lap 30-60mm, interlayer temperature 400-450 DEG C;
2) weld preheating: rise to 400 DEG C with the programming rate of 50 DEG C/h, is incubated 6 hours;
3) in order to ensure interlayer temperature and welding uniformity, welding process is carried out in temperature automatically controlled bell furnace, and carries out expedite circumference rotation;
4) post weld heat treatment: rise to 550-600 DEG C with the programming rate of 50 DEG C/h, is incubated 10 hours, cools with stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099802.1A CN105499835A (en) | 2016-02-23 | 2016-02-23 | Welding material and welding method for repairing straightening rolls of hot-rolling separators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099802.1A CN105499835A (en) | 2016-02-23 | 2016-02-23 | Welding material and welding method for repairing straightening rolls of hot-rolling separators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105499835A true CN105499835A (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610099802.1A Pending CN105499835A (en) | 2016-02-23 | 2016-02-23 | Welding material and welding method for repairing straightening rolls of hot-rolling separators |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105499835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772985A (en) * | 2016-05-05 | 2016-07-20 | 江苏星源电站冶金设备制造有限公司 | Surface wire build-up welding material |
| CN114535751A (en) * | 2022-04-08 | 2022-05-27 | 西安理工大学 | Mining scraper CMT gradient surfacing layer and preparation method thereof |
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| CN114535751A (en) * | 2022-04-08 | 2022-05-27 | 西安理工大学 | Mining scraper CMT gradient surfacing layer and preparation method thereof |
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