CN106670977A - Steel structure shot blasting and rust removing method - Google Patents
Steel structure shot blasting and rust removing method Download PDFInfo
- Publication number
- CN106670977A CN106670977A CN201710005132.7A CN201710005132A CN106670977A CN 106670977 A CN106670977 A CN 106670977A CN 201710005132 A CN201710005132 A CN 201710005132A CN 106670977 A CN106670977 A CN 106670977A
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- steel
- bullet
- ball
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- component
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 93
- 239000010959 steel Substances 0.000 title claims abstract description 93
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005422 blasting Methods 0.000 title claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 15
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000005260 corrosion Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 10
- 239000006187 pill Substances 0.000 claims description 10
- 238000007596 consolidation process Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 238000010009 beating Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007799 dermal corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- -1 section bar Substances 0.000 description 1
- 231100000108 skin corrosion Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides and relates to a steel structure shot blasting and rust removing method to improve the rust removing efficiency of steel and reduce energy consumption. According to the method, a method for controlling surface roughness by selecting proper shot kinds and different shot grades, a method for controlling the casting time by adopting different conveying roller way speeds on steel surfaces of different rust grades and a method for controlling energy consumption through adjustment of casting angles and stopping of a casting device are adopted, and therefore the purposes of ensuring the rust removing grade, improving the rust removing quality, improving the production efficiency, reducing energy consumption and reducing the production cost are achieved. The method is suitable for construction for steel material surface cleaning and friction surface treatment of welding H steel, steel materials, sectional materials, steel pipes and steel structure nodes.
Description
Technical field
The present invention relates to a kind of steel rust removing method, particularly a kind of steel construction impeller blasting method.
Background technology
Processing of rust removing is one master operation of steel construction production link, if the bad product for directly affecting steel construction for the treatment of
Matter and quality, make the maintenance cycle of steel construction shorten or influence service life, bring the structure of steel construction validity period to pacify sometimes
Full problem, with the development of steel construction, impeller blasting has turned into the main rust cleaning of construction steel structure rust cleaning with its unique advantage
Method.
The species of bullet, shape, size and level match somebody with somebody be surface roughness after influence rust cleaning critically important factor, choosing it is too big
When bullet to get to steel surface broken, and energy absorption reduces ballistic work, choosing it is too small, bullet is beaten in steel surface mutability
It is existing, own absorption energy, and reduce ballistic work.In general, bullet is bigger, rust cleaning effect it is better, but rust cleaning after surface it is thick
Rugosity is bigger, and the bullet grain number that the component surface of same area is covered when throwing and beating is few, and effect is low.Additionally, impeller blasting be by
The bullet dished out is beaten and reaches the shot except the purpose of surface iron rust, dished out in steel surface and beat less than required steel surface, i.e.,
" sky is beaten ", can produce unnecessary energy consumption.
The content of the invention
The present invention provides a kind of steel construction impeller blasting method, at least up to improve the purpose of derusting.
To solve above technical problem, the present invention is adopted the following technical scheme that.A kind of steel construction impeller blasting method, including
The selection of bullet is matched somebody with somebody with level, the control of ball blast time and adjustment vibrating deflection, wherein, selection and the level of bullet are matched somebody with somebody, from ￠ 1, ￠
1.4 circular cast steel ball mixes with the steel pill cutting of the length 2mm of ￠ 1.2, and cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:（2.5-3.5）,
Cast steel ball and steel pill cutting ratio are 4:（5-7）；Controlled with the speed of control rollgang according to steel surface corrosion degree
The ball blast time；Structure and Height Adjustment vibrating deflection according to steel.
The present invention is matched somebody with somebody from suitable bullet and bullet level, it is ensured that steel surface roughness after rust cleaning, improves application
When paint film adhesive force.Using the method for determination rollgang speed compared with the method that the examination of traditional test specimen is thrown, it is ensured that rust cleaning
Quality, while saving process time, improves effect, reduces rust cleaning cost.Casting angle by Reasonable adjustment can subtract
Lack energy consumption and extend the service life of shot-blast apparatus.
Further, cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:3, cast steel ball and steel pill cutting ratio are 4:6.
Further, the hardness of the bullet of the selection（Rockwell hardness）HRC5-25 bigger than component surface hardness.
Further, the bullet hardness of the selection（Rockwell hardness）Control is in HRC40-50.
Further, when the present invention is 60m/min according to ejection velocity, the steel surface of following table difference rusting grade is thrown
The speed that the rollgang speed interval corresponding to different rusting grades determines rollgang is reached during ball,
Material surface hardness is relatively large to get the small value, and case hardness is relatively small to take large values, and is got the small value after just mending ball, bullet abrasion
It is serious to tend to be taken large values when mending ball.
Further, after adjusting vibrating deflection, component is hung to roller-way, steel for clearance or component purlin is hung and sling
It is stably placed on roller-way, and puts consolidation, it is not collided with shot-blasting machine during spraying, then start is sprayed, structure
After part rust cleaning is finished, roller-way is hung with purlin in time, hung to specified position, and carry out finished product protection.
The method that the present invention is provided can be summarized as " three control reinforcement ", and the method is by selecting suitable bullet species and not
Match somebody with somebody the method for carrying out control surface roughness with bullet level, the steel surface of different rusting grades uses different rollgang speed
Method to control the projectile time, the method that control energy consumption is closed down with the adjustment and flinger of vibrating deflection, reaching ensures rust cleaning etc.
Level, the purpose for improving derusting, improve production efficiency, saving energy consumption and reduction production cost.The method is applied to steel table
Face is cleared up, and removes the construction of welded H steel, steel, section bar, steel pipe and steel structure node friction surface treatment.
Specific embodiment
Steel construction impeller blasting is that the intensive bullet throwing dished out from different directions using the impeller head of shot-blasting machine is beaten in steel
Material surface, removal oxide skin thereon, rusty scale and and dirt and obtains the derusting method of certain surface roughness.In a kind of typical case
Implementation method in, steel construction impeller blasting method, including selection and the level of bullet are matched somebody with somebody, the control of ball blast time and adjustment cast
Angle.
1. the selection of bullet is matched somebody with somebody with level
The size of surface roughness influences very big on coating adhesion before steel structure coating, and surface roughness is too small, and paint film lacks
Necessary anchor point, the adhesive force after being fully cured is small, and coating is it may happen that early damage, decortication, cracking occurs or be layered
Deng if surface roughness is excessive, the timing of paint film consumption one then causes film thickness skewness, particularly at crest
Film thickness is less than design requirement, causes the corrosion of early stage, also often interior retain bubble, will turn into and paint deeper paddy is recessed in addition
The root of film foaming, so must be controlled by the steel surface roughness after rust cleaning during construction.And species, the shape of bullet
Shape, size and level are with the critically important factor for being surface roughness after influence eliminates rust.The selection of bullet and level are matched somebody with somebody, after should beating throwing
Steel surface roughness Ry（Maximum height of the profile）Control is detected at 40 μm -60 μm using surface coarseness profiling instrument.
Bullet is bigger, and rust cleaning effect is better, but surface roughness after rust cleaning is bigger, and the component surface of same area is being thrown
The bullet grain number covered when beating is few, and effect is low, because excessive roughness has a negative impact to japanning, so straight to bullet
Footpath is any limitation as.The selection of bullet is matched somebody with somebody with level, and the steel pill cutting from ￠ 1, the circular cast steel ball of ￠ 1.4 and the length 2mm of ￠ 1.2 is mixed
Close, cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:（2.5-3.5）, cast steel ball and steel pill cutting ratio are 4:（5-7）.Steel pill cutting is steel
Silk is cut into chunks the cylinder-shaped bullet to be formed, and cylinder corner angle have certain scraping action, both will not damaged member surface, can carry again
Rust cleaning efficiency high.
In a preferred embodiment, cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:3, cast steel ball and steel pill cutting ratio
It is 4:6.
In a preferred embodiment, the hardness of the bullet of the selection（Rockwell hardness）It is bigger than component surface hardness
HRC5-25.Further, the bullet hardness of the selection（Rockwell hardness）Control is in HRC40-50.To common buildings steel construction
With the component impeller blasting of Q235, Q345 steel, the hardness of the bullet of selection（Rockwell hardness）HRC5- bigger than component surface hardness
25 because choosing it is too big when bullet to get to steel surface broken, and energy absorption reduces ballistic work, choosing it is too small, bullet is beaten
Easily cashed in steel surface, own absorption energy, and reduce ballistic work, the moderate bullet of hardness is least good, rust cleaning effect is good,
Therefore, the bullet hardness of selection（Rockwell hardness）Control is in HRC40-50.
2. the control of ball blast time, ball blast is controlled according to steel surface corrosion degree with the speed of control rollgang
Time.
Component is positioned on rollgang, and component slowly is transported into projectile room, component termination or end with certain speed
The flinger that tail actuated shot is cast to component surface at the beginning of between to exit cast room and leave shot throw beat surface
Time be the ball blast time, the ball blast time is controlled with the speed of control rollgang, reaching rust cleaning effect.
For different corrosions steel surface by certain adopting projectile casting technology, when reaching same derusting grade, corrosion is serious
The speed of the rollgang for using wants smaller, and the speed of the not serious rollgang for using will be more greatly.For same corrosion etc.
, by certain adopting projectile casting technology, when reaching different derusting grades, the speed of derusting grade rollgang high will for the steel surface of level
Smaller, the speed of the low rollgang of derusting grade will be more greatly.Combined by rust cleaning steel surface corrosion situation according to principles above
With the derusting grade of design requirement, the determination method of rollgang speed has been formulated.
The rusting grade of steel surface is first judged with method faster than sample, then with the derusting grade of design requirement, determines conveying roller
The suitable overall travel speed in road.
Steel surface corrosion is generally divided into three layers, and outermost layer is Fe2O3, state labile, next Fe3O4It is in stable condition,
Innermost FeO state labiles, so the rust cleaning of general steel construction will destroy innermost FeO layers.The corrosion of steel surface
Grade is judged with than sample block method.
Steel surface rusting grade A, B, tetra- kinds of rusting grades of C, D, are described as follows：A grades：Comprehensively covering oxide skin and it is several
Steel surface without iron rust；B grades：Have occurred and that corrosion, and the steel surface that partial oxidation skin has been peeled off；C grades：
Oxide skin is peeled off because of corrosion or can struck off, and has the steel surface of a small amount of point rust；D grades：Oxide skin corrosion and whole
Coming off, and the steel surface of point rust has generally occurred does not allow to use；The judgement of impeller blasting grade is compared with than sample block method
National standard samples pictures.Derusting grade explanatory note is as follows：
The impeller blasting that Sa1- is slight.Steel surface should be without visible grease or dirt, and without attachment oxidation loosely
The attachments such as skin, iron rust and painting layer.Sa2- thoroughly impeller blastings.Steel surface should without visible grease or dirt, and
And the attachment such as oxide skin, iron rust and painting layer is removed substantially, its residue should be firm attachment.Steel after impeller blasting
The indenture that surface is formed, rubbing surface anti-slip coefficient can reach 0.35-0.45.sa21/ 2- very thoroughly impeller blastings.Steel
Material surface should only should be without the attachment such as visible grease or dirt, oxide skin, iron rust and painting layer, the vestige of any residual
The slight color spot of point-like or strip.The indenture that steel surface is formed after impeller blasting, rubbing surface anti-slip coefficient can reach 0.45-
0.50.Sa3- makes the clean impeller blasting of steel surface.Steel surface should without visible grease or dirt, oxide skin, iron rust and
The attachments such as painting layer, show uniform metallic luster.The indenture that steel surface is formed after impeller blasting, rubbing surface resistant slide
Coefficient can reach more than 0.50.Evaluation steel surface rusting grade and derusting grade should be in good scattering daylight or in illumination bar
Carried out under part, steel surface to be detected is visually compared with corresponding photo.Shone with the more serious grade of corresponding corrosion
Rusting grade shown by piece during evaluation derusting grade, is marked as evaluation result with the immediate photo of steel surface outward appearance
The derusting grade shown is used as evaluation result.
In a preferred embodiment, during according to ejection velocity for 60m/min, the steel of following table difference rusting grade
The speed that the rollgang speed interval corresponding to different rusting grades determines rollgang is reached during material shotblasting
Material surface hardness is relatively large to get the small value, and case hardness is relatively small to take large values, and is got the small value after just mending ball, bullet abrasion
It is serious to tend to be taken large values when mending ball.
3. vibrating deflection, the vibrating deflection of structure and Height Adjustment shot-blasting machine according to steel are adjusted.
Because impeller blasting is that the bullet that will be dished out is beaten and reaches the steel except the purpose of surface iron rust, dished out in steel surface
Ball is beaten less than required steel surface, i.e. " sky is beaten ", can produce unnecessary energy consumption, so to be adjusted according to the structure of component and height
The jet angle of whole shot-blasting machine.
First by bullet valve closing, component is transported to projectile region, roller-way is out of service, checks safe and punctual rear opening
, manually be put into a small amount of bullet in stream ball pipe by impeller head, transports workpiece after waiting impeller head out of service, checks that position is beaten in its throwing
Put, it is such as undesirable, vibrating deflection is adjusted.
During adjustment, positioning sleeve is rotated counterclockwise, vibrating deflection is upward；Positioning sleeve is rotated clockwise, vibrating deflection is downward.
If there is the steel surface without casting, its corresponding flinger is closed.
In a kind of relative specific embodiment, after adjusting vibrating deflection, component is hung to roller-way, by steel for clearance
Material or component purlin are sling and are stably placed on roller-way, and put consolidation, start the orbit transports machine for being adjusted to corresponding speed,
Make by thrown beat object along track slowly into shot-blasting machine throw beat room, start is sprayed, component eliminate rust finish after, hung with purlin in time
Roller-way is hung, is hung to specified position, and carry out finished product protection.
Relatively specific operating procedure is as follows：
4. component is hung to roller-way
Steel for clearance or component purlin are sling and are stably placed on roller-way, and puts consolidation.It is set to spray process
In will not be collided with shot-blasting machine.
5. start is sprayed
The situation easy to wear such as backplate, rubber curtain is checked before operating, is changed in time.The cooperation of each moving component is checked, bolt connects
Connect and whether loosen, tighten in time.Check whether there is debris to fall into machine, cleaning in time prevents blocking, check that each component lubrication is
It is no to meet specification.Should determine that indoor, inlet port is unmanned before start could start.Check bullet level with whether meet derusting grade will
Ask, can cast angle reach requirement.Elevator belt will in time check whether loosening, be adjusted in time if any loosening.Observed in operating
Workpiece whether sideslip, in time adjustment.Roller-way running speed control in strict accordance with require conveying.Machine should be removed periodically in operation
Waste in separator, deduster, it is ensured that equipment runs well.Whether just to note impeller head vibrations in operation and sound equipment
Often, bearing and motor ramp case, when there is abnormal timely shutdown inspection, fix a breakdown or change blade.
6. component hangs out roller-way
After component rust cleaning is finished, roller-way is hung with purlin in time, hung to specified position, and carry out finished product protection.
7. inspect for acceptance
After component rust cleaning is finished, component surface roughness and derusting grade are checked according to code requirement, and carry out inspection
Record of acceptance.
Claims (6)
1. a kind of steel construction impeller blasting method, it is characterised in that：Selection including bullet is matched somebody with somebody with level, the control of ball blast time and
Adjustment vibrating deflection, wherein, selection and the level of bullet are matched somebody with somebody, from the steel of ￠ 1, the circular cast steel ball of ￠ 1.4 and the length 2mm of ￠ 1.2
Pill cutting mixes, and cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:（2.5-3.5）, cast steel ball and steel pill cutting ratio are 4:（5-7）；According to
Steel surface corrosion degree with the speed of control rollgang controls the ball blast time；According to the structure and Height Adjustment of steel
Vibrating deflection.
2. method according to claim 1, it is characterised in that：Cast steel ball ￠ 1, the ratio of ￠ 1.4 are 2:3, cast steel ball with
Steel pill cutting ratio is 4:6.
3. method according to claim 1 and 2, it is characterised in that：The hardness of the bullet of the selection（Rockwell hardness）Than
The big HRC5-25 of component surface hardness.
4. method according to claim 3, it is characterised in that：The bullet hardness of the selection（Rockwell hardness）Control exists
HRC40-50。
5. method according to claim 1, it is characterised in that：During according to ejection velocity for 60m/min, the different rust of following table
The rollgang speed interval reached corresponding to different rusting grades during the steel surface ball blast for losing grade determines rollgang
Speed,
Material surface hardness is relatively large to get the small value, and case hardness is relatively small to take large values, and is got the small value after just mending ball, bullet abrasion
It is serious to tend to be taken large values when mending ball.
6. the method according to claim 1,2,4 or 5, it is characterised in that：After adjusting vibrating deflection, component is hung to roller
Road, steel for clearance or component purlin are sling and are stably placed on roller-way, and put consolidation, make it during spraying
Will not be collided with shot-blasting machine, then start is sprayed, after component rust cleaning is finished, hang roller-way with purlin in time, hung to specified
Position, and carry out finished product protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005132.7A CN106670977A (en) | 2017-01-04 | 2017-01-04 | Steel structure shot blasting and rust removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005132.7A CN106670977A (en) | 2017-01-04 | 2017-01-04 | Steel structure shot blasting and rust removing method |
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| Publication Number | Publication Date |
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| CN106670977A true CN106670977A (en) | 2017-05-17 |
Family
ID=58849044
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710005132.7A Pending CN106670977A (en) | 2017-01-04 | 2017-01-04 | Steel structure shot blasting and rust removing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900915A (en) * | 2017-11-29 | 2018-04-13 | 中石化石油机械股份有限公司沙市钢管分公司 | A kind of simple energy-efficient steel tube surface derusting process |
| CN109079103A (en) * | 2018-08-17 | 2018-12-25 | 江苏华滋海洋工程有限公司 | A kind of construction new process of novel water conservancy project steel-pipe pile connection lock |
| CN109333369A (en) * | 2018-10-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | The method for reducing hot plate Shot Blasting rear surface roughness |
| CN110039454A (en) * | 2019-04-03 | 2019-07-23 | 北京科技大学 | A kind of pellet partial size based on ball blast de-scaling and motor speed optimization method |
| CN115135451A (en) * | 2020-03-24 | 2022-09-30 | 日立安斯泰莫株式会社 | Determination method of projectile projection conditions and manufacturing method of coil spring |
| CN115502896A (en) * | 2022-08-17 | 2022-12-23 | 武汉钢铁有限公司 | Steel plate defect processing method and related equipment |
| CN116394166A (en) * | 2023-04-04 | 2023-07-07 | 保定天威保变电气股份有限公司 | Steel plate sanding front-rear corresponding grade comparison template and method |
| WO2024187532A1 (en) * | 2023-03-14 | 2024-09-19 | 中冶南方工程技术有限公司 | Hot-rolled strip steel plate treatment method and treatment unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900915A (en) * | 2017-11-29 | 2018-04-13 | 中石化石油机械股份有限公司沙市钢管分公司 | A kind of simple energy-efficient steel tube surface derusting process |
| CN109079103A (en) * | 2018-08-17 | 2018-12-25 | 江苏华滋海洋工程有限公司 | A kind of construction new process of novel water conservancy project steel-pipe pile connection lock |
| CN109333369A (en) * | 2018-10-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | The method for reducing hot plate Shot Blasting rear surface roughness |
| CN110039454A (en) * | 2019-04-03 | 2019-07-23 | 北京科技大学 | A kind of pellet partial size based on ball blast de-scaling and motor speed optimization method |
| CN115135451A (en) * | 2020-03-24 | 2022-09-30 | 日立安斯泰莫株式会社 | Determination method of projectile projection conditions and manufacturing method of coil spring |
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