CN100427633C - Hot spray surface reinforcing process for nodular cast iron plunger - Google Patents
Hot spray surface reinforcing process for nodular cast iron plunger Download PDFInfo
- Publication number
- CN100427633C CN100427633C CNB2006100315172A CN200610031517A CN100427633C CN 100427633 C CN100427633 C CN 100427633C CN B2006100315172 A CNB2006100315172 A CN B2006100315172A CN 200610031517 A CN200610031517 A CN 200610031517A CN 100427633 C CN100427633 C CN 100427633C
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- CN
- China
- Prior art keywords
- cast iron
- spheroidal graphite
- graphite cast
- spray
- nodular cast
- 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.)
- Expired - Fee Related
Links
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 78
- 239000007921 spray Substances 0.000 title claims abstract description 37
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 27
- 238000005507 spraying Methods 0.000 claims abstract description 41
- 238000005524 ceramic coating Methods 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 43
- 239000011248 coating agent Substances 0.000 claims description 32
- 238000000576 coating method Methods 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 230000003746 surface roughness Effects 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 239000010431 corundum Substances 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 26
- 229910052804 chromium Inorganic materials 0.000 abstract description 25
- 239000011651 chromium Substances 0.000 abstract description 25
- 238000005516 engineering process Methods 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract 3
- 239000004576 sand Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000011449 brick Substances 0.000 description 11
- 239000000919 ceramic Substances 0.000 description 5
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The present invention discloses a hot spray surface reinforcing technology for a nodular cast iron plunger piston, which comprises the following technological steps that the surface of the base body of nodular cast iron is purified by a solvent, and the base body of the nodular cast iron is roasted by the flames; then, the base body of the nodular cast iron is cleaned so as to remove oil, and the surface of the base body of the nodular cast iron has no invisible oil after the surface of the base body of the nodular cast iron is purified; next, sand spray is carried out to the base body of the nodular cast iron, a metal-ceramic coating layer is sprayed on the base body of the nodular cast iron, and the base body of the nodular cast iron after spray coating is ground and polished so as to obtain a finished product. The present invention is a technology for replacing forged steel by utilizing nodular cast iron, and a hot spray coating layer is used for replacing a chromium coating layer so as to improve the surface abrasion resistance of a plunger piston. The present invention has the advantages of simple technological operation, flexibility, high efficiency, environmental protection and energy saving.
Description
Technical field
The present invention relates to a kind of technology of carrying out the high-speed flame hot spray surface reinforcing, particularly relate to a kind of technology of carrying out the high-speed flame hot spray surface reinforcing ceramic automatic hydraulic brick pressing machine nodular cast iron plunger to nodular cast iron plunger.
Background technology
Pottery automatic hydraulic brick pressing machine is the high-tech key equipment on world's ceramic wall and floor bricks production line, connection raw material manufacturing procedure before it, after connect dry firing process.Press one stops stopping work completely in the production process, directly influences the production efficiency and the economic benefit of enterprise.
The pottery hydraulic press is that the most abominable, the reliability of operating mode requires higher equipment again in the existing all kinds of mechanical means.A machine is reached the standard grade, and almost 1 year 365 days, one day 24 hours all was to be in standby to recycle among the state, also will be in the face of the strong dust atmosphere of abrasion.As the hydraulic plunger of brick pressing machine key part, generally adopt the forged steel manufacturing and in its chrome-faced strengthening the wear resistance of plunger surface, but brick pressing machine is operated plunger surface and still is easy to be worn destruction under this environment.Not only cause and shut down the work-ing life that stops production but also reduce complete machine greatly.Should connect the production efficiency and the economic benefit that influence enterprise.
Spheroidal graphite cast iron has the tensile strength approaching with forged steel, adopts spheroidal graphite cast iron to make plunger and can save material, reduce processing charges and reduce cost.But the spheroidal graphite cast iron surface is difficult to chromium plating, has therefore limited the application of spheroidal graphite cast iron as plunger material.
Summary of the invention
Technical problem to be solved by this invention provides a kind of employing spheroidal graphite cast iron and substitutes forged steel, adopts hot spray coating to substitute the hot spray surface reinforcing process that chromium coating improves the nodular cast iron plunger of plunger surface wear resisting property.
In order to solve the problems of the technologies described above, as follows to the step of carrying out hot spray surface reinforcing process of nodular cast iron plunger:
A, workpiece surface purify
Adopt flame baking and solvent phase in conjunction with the spheroidal graphite cast iron matrix is carried out surface cleaning, the spheroidal graphite cast iron matrix is carried out flame baking; The spheroidal graphite cast iron matrix is carried out the oil removing wiping, and the spheroidal graphite cast iron matrix surface purifies the rear surface does not have the visible oil stain of naked eyes;
B, surface preparation
The spheroidal graphite cast iron matrix is carried out sandblast;
C, spray coating metal ceramic coating
To spheroidal graphite cast iron matrix spray coating metal ceramic coating;
D, coating machine processing
Spheroidal graphite cast iron matrix after the spraying is carried out grinding, polishing, be finished product.
It is with the oxy-acetylene flame rifle spheroidal graphite cast iron matrix to be carried out flame baking that described workpiece surface purifies, 100 ℃～200 ℃ of workpiece surface temperatures; Adopt acetone solvent that the spheroidal graphite cast iron matrix is carried out the oil removing wiping.
Described surface preparation is to adopt 20# palm fibre corundum the spheroidal graphite cast iron matrix to be carried out sandblast, compressed air pressure 0.5～0.7kg/cm
2, the surfaceness after the sandblast reaches the Sa3 level.
Described spray coating metal ceramic coating is to adopt supersonic spray gun to spheroidal graphite cast iron matrix spray coating metal ceramic coating, and material is the WC-12Co dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 200～250mm; Parameter control O
2: 15～18SCFM, C
3H
6: 200～240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.
Described coating machine procedure of processing is as follows:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m～Ra1.0 μ m;
B, on lathe, reach Ra0.3 μ m～Ra0.6 μ m with boart boart band polishing machine glazed surface roughness;
C, on lathe, the honed surface roughness reaches Ra0.1 μ m～Ra0.4m.
Adopt the hot spray surface reinforcing process of the nodular cast iron plunger of technique scheme, improved the plunger surface wear resisting property.Because hot-spraying techniques is a kind of production technique of cleaning, can eliminate the severe contamination that electrodeposited chromium technology causes environment.This technological operation is easy, flexible and efficient, and coated material is of a great variety.Hot spray coating not only can reach the mirror-finishing of chromium coating, and also substantially exceeds chromium coating at aspects such as hardness and wear resisting propertys.Adopt nodular iron casting to substitute forged steel pieces; adopt the HVOF (High Velocity Oxygen Fuel) hard wear-resistant coating to substitute the plunger that chromium coating is made ceramic hydraulic press; the present invention not only saves manufacturing cost; and substitute the electrodeposited chromium technology of serious environment pollution with the hot spray production technique of cleaning, also have the great social effect of protection environment.The manufacturing cost of the nodular cast iron plunger that the hard, wear-resistant hot spray coating is strengthened reduces 10-20% than chromium plating forged steel plunger.
In sum, the present invention is that a kind of employing spheroidal graphite cast iron substitutes forged steel, and the alternative chromium coating of employing hot spray coating improves the plunger surface wear resisting property and technological operation is easy, flexible and efficient, the hot spray surface reinforcing process of the nodular cast iron plunger of environmental protection and energy saving.
Embodiment
Hydraulic plunger in ceramic hydraulic press substitutes forged steel with spheroidal graphite cast iron, adopts hot spray coating to substitute chromium coating and improves the plunger surface wear resisting property, and is as follows to the step of carrying out hot spray surface reinforcing process of nodular cast iron plunger:
One, workpiece surface purifies
Adopt flame baking and solvent phase in conjunction with the spheroidal graphite cast iron matrix is carried out surface cleaning, with the oxy-acetylene flame rifle spheroidal graphite cast iron matrix is carried out flame baking, 100 ℃～200 ℃ of workpiece surface temperatures; Adopting solvent is acetone oil removing wiping to the spheroidal graphite cast iron matrix, and the spheroidal graphite cast iron matrix surface purifies the rear surface does not have the visible oil stain of naked eyes;
Two, surface preparation
Adopt 20# palm fibre corundum the spheroidal graphite cast iron matrix to be carried out sandblast, compressed air pressure 0.5～0.7kg/cm
2, the surfaceness after the sandblast reaches the Sa3 level;
Three, spray coating metal ceramic coating
Adopt supersonic spray gun to spheroidal graphite cast iron matrix spray coating metal ceramic coating, material is the WC-12Co dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 200～250mm; Parameter control O
2: 15～18SCFM, C
3H
6: 200～240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.
Four, coating machine processing
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m～Ra1.0 μ m.
B, on lathe, reach Ra0.3 μ m～Ra0.6 μ m with boart boart band polishing machine glazed surface roughness.
C, on lathe, the honed surface roughness reaches Ra0.1 μ m～Ra0.4 μ m.
Ductile cast iron material is different from fine and close forged steel material, has pore and some casting flaws more, after must repairing and repair its surface before the spraying, could obtain satisfactory coating.
Include a certain amount of free graphite in the spheroidal graphite cast iron, influence combining of coating and matrix.Therefore, go out in conjunction with firm high-quality coating, must before coating spraying, carry out aforementioned technology one, two and carry out pre-treatment and select aforementioned technology three to spray, could satisfy the specification of quality that ceramic hydraulic press uses in the spheroidal graphite cast iron surface preparation.
The characteristics of hot spray coating are to have hole, in order to obtain the minute surface roughness as chromium coating, must prepare the coating (optimization by powder size, spray parameters realizes) of high compaction and make rational coating after-processing technology.
Below in conjunction with specific embodiment the present invention is elaborated.
Embodiment 1:
One, workpiece surface purifies
Adopt flame baking and solvent phase in conjunction with the spheroidal graphite cast iron matrix is carried out surface cleaning, with the oxy-acetylene flame rifle spheroidal graphite cast iron matrix is carried out flame baking, 100 ℃ of workpiece surface temperatures; Adopt acetone solvent that the spheroidal graphite cast iron matrix is carried out the oil removing wiping, the spheroidal graphite cast iron matrix surface purifies the rear surface does not have the visible oil stain of naked eyes;
Two, surface preparation
Adopt 20# palm fibre corundum the spheroidal graphite cast iron matrix to be carried out sandblast, compressed air pressure 0.5kg/cm
2Kg/cm
2, the surfaceness after the sandblast reaches the Sa3 level.
Three, spray coating metal ceramic coating
Adopt supersonic spray gun to spheroidal graphite cast iron matrix spray coating metal ceramic coating, material is the WC-12Co dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 250mm; Parameter control O
2: 15SCFM, C
3H
6: 200SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.
Four, coating machine processing
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m.
B, on lathe, reach Ra0.3 μ m with boart boart band polishing machine glazed surface roughness.
C, on lathe, the honed surface roughness reaches Ra0.4 μ m.
Be 3 times of chromium coating the friction durability of adopting its coating of plunger of spraying abrasion-proof metal-ceramic coating.
Embodiment 2:
One, workpiece surface purifies
Adopt flame baking and solvent phase in conjunction with the spheroidal graphite cast iron matrix is carried out surface cleaning, with the oxy-acetylene flame rifle spheroidal graphite cast iron matrix is carried out flame baking, 100 ℃ of workpiece surface temperatures; Adopt acetone solvent that the spheroidal graphite cast iron matrix is carried out the oil removing wiping, the spheroidal graphite cast iron matrix surface purifies the rear surface does not have the visible oil stain of naked eyes;
Two, surface preparation
Adopt 20# palm fibre corundum the spheroidal graphite cast iron matrix to be carried out sandblast, compressed air pressure 0.7kg/cm
2, the surfaceness after the sandblast reaches the Sa3 level.
Three, spray coating metal ceramic coating
Adopt supersonic spray gun to spheroidal graphite cast iron matrix spray coating metal ceramic coating, material is the WC-12Co dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 200mm; Parameter control O
2: 18SCFM, C
3H
6: 240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.
Four, coating machine processing
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra1.0 μ m.
B, on lathe, reach Ra0.6 with boart boart band polishing machine glazed surface roughness.
C, on lathe, the honed surface roughness reaches Ra0.1 μ m.
Be 5 times of chromium coating the friction durability of adopting its coating of plunger of spraying abrasion-proof metal-ceramic coating.
The present invention carries out hot spray surface reinforcing process to the spheroidal graphite cast-iron matrix, and is as follows in order to the effect that replaces forged steel:
One, adopts the hot-spraying technique replacing electroplating chromium process of cleaning, eliminated environment Severe contamination.
Two, adopt spheroidal graphite cast-iron to substitute forged steel, adopt hot-spraying technique replacing electroplating chromium to make The hydraulic press plunger can reduce manufacturing cost. Take diameter as 1.3m, about 8 tons of weight 4800 tons of brick machine plungers be example, if adopt the Forging Technology manufacturing, forging blank is heavily about 10 tons, add processing and chromium plating expense, about 120,000 yuan of total cost (than import parts low 20%). If heavily about 8 tons of employing nodular iron casting, strand, about 100,000 yuan of total cost. Save cost Nearly 20%.
Three, the wearability of hot-spraying coating be electrodeposited chromium layers 3-5 doubly, can significantly improve pressure The wearability of brick column plug prolongs service life of brick machine, reduce enterprise because shut down, The economic loss that maintenance of equipment brings is carried out in stopping production. Chromium plating forged steel plunger all will be torn open general every year Unload maintenance once, cost with several ten thousand yuan at every turn. In addition, the minimizing of output also will affect enterprise The income of industry.
Four, need to adopt the post of hot-spraying coating reinforcement except annual about 500 new machine Beyond the Great Wall, the press of more than 4000 on-line operation all can adopt hot-spraying coating repair and Strengthen, prolong its service life, bring certain economic benefit to enterprise.
Five, electrodeposited chromium layers is a kind of wearing layer that is widely used in component of machine, adopts clear It is the inexorable trend of social development that clean thermal spraying replaces chromium coating. The mirror that anti-wear performance is good The application that the face hot-spraying coating substitutes chromium coating is very wide.
The present invention adopts HVOF method and suitable substrate pretreated technology, The preparation of spheroidal graphite cast-iron brick machine plunger surface is combined well with matrix, good being coated with of anti-wear performance Layer, the wearability of raising brick machine is in order to replace chrome faced forged steel plunger. The present invention Replace forged steel with spheroidal graphite cast-iron, with the technology of hot-spraying coating replacement chromium coating, press at hydraulic pressure Brick machine manufacturing industry is a kind of new trial, is a kind of innovation to former manufacturing process. The present invention Enforcement, can not only reduce hydraulic press manufacturing cost, improve plunger anti-wear performance, Prolong the service life of complete machine. And, adopt the hot-spraying technique of cleaning to replace the electrodeposited chromium worker Skill has been eliminated the severe contamination of electrodeposited chromium technology to environment, is conducive to environmental protection.
Claims (2)
1, a kind of hot spray surface reinforcing process of nodular cast iron plunger, its processing step is as follows:
A, workpiece surface purify
Adopt flame baking and solvent phase in conjunction with the spheroidal graphite cast iron matrix is carried out surface cleaning, the spheroidal graphite cast iron matrix is carried out flame baking; The spheroidal graphite cast iron matrix is carried out the oil removing wiping, and the spheroidal graphite cast iron matrix surface purifies the rear surface does not have the visible oil stain of naked eyes;
B, surface preparation
The spheroidal graphite cast iron matrix is carried out sandblast, adopt 20# palm fibre corundum the spheroidal graphite cast iron matrix to be carried out sandblast, compressed air pressure 0.5～0.7kg/cm
2, the surfaceness after the sandblast reaches the Sa3 level;
C, spray coating metal ceramic coating
To spheroidal graphite cast iron matrix spray coating metal ceramic coating, adopt supersonic spray gun to spheroidal graphite cast iron matrix spray coating metal ceramic coating, material is the WC-12Co dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 200～250mm; Parameter control O
2: 15～18SCFM, C
3H
6: 200～240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process;
D, coating machine processing, procedure of processing is as follows:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m～Ra1.0 μ m,
B, on lathe, reach Ra0.3 μ m～Ra0.6 μ m with boart boart band polishing machine glazed surface roughness,
C, on lathe, the honed surface roughness reaches Ra0.1 μ m～Ra0.4 μ m.
Spheroidal graphite cast iron matrix after the spraying is carried out grinding, polishing, be finished product.
2, the hot spray surface reinforcing process of a kind of nodular cast iron plunger according to claim 1 is characterized in that: it is with oxygen one acetylene torch rifle the spheroidal graphite cast iron matrix to be carried out flame baking that described workpiece surface purifies, 100 ℃～200 ℃ of workpiece surface temperatures; Adopt acetone solvent that the spheroidal graphite cast iron matrix is carried out the oil removing wiping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315172A CN100427633C (en) | 2006-04-14 | 2006-04-14 | Hot spray surface reinforcing process for nodular cast iron plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315172A CN100427633C (en) | 2006-04-14 | 2006-04-14 | Hot spray surface reinforcing process for nodular cast iron plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851033A CN1851033A (en) | 2006-10-25 |
| CN100427633C true CN100427633C (en) | 2008-10-22 |
Family
ID=37132535
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100315172A Expired - Fee Related CN100427633C (en) | 2006-04-14 | 2006-04-14 | Hot spray surface reinforcing process for nodular cast iron plunger |
Country Status (1)
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| CN (1) | CN100427633C (en) |
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| CN102212772A (en) * | 2011-05-24 | 2011-10-12 | 德清县武康镇创智热喷涂厂 | Method for preparing thermally sprayed ceramic coating of plunger of high-pressure cleaning machine |
| CN102330049A (en) * | 2011-09-05 | 2012-01-25 | 广州市天河区金棠表面工程技术有限公司 | Door rod strengthening technology for air pump recycling regulation door |
| CN102431240B (en) * | 2011-09-23 | 2015-12-02 | 湖州标立节能技术有限公司 | There is the Cast Iron Products of protective decoration coating layer |
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| CN102776464A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Manufacture method of iron-base part ceramic coating |
| CN102774088A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Novel iron-base ceramic coating |
| CN103147033B (en) * | 2013-04-02 | 2015-06-03 | 南阳淅减汽车减振器有限公司 | Vehicle shock absorber piston rod spraying technology |
| US9067282B2 (en) * | 2013-05-14 | 2015-06-30 | Caterpillar Inc. | Remanufacturing cast iron component with steel outer layer and remanufactured component |
| CN104233167A (en) * | 2013-06-21 | 2014-12-24 | 上海宝钢工业技术服务有限公司 | Modification treatment method for surface of automobile die through thermal spraying |
| CN103789714B (en) * | 2014-02-18 | 2016-03-09 | 北京工业大学 | A kind of preparation method of hydrostatic transmission component surface protective coating |
| CN105290719A (en) * | 2014-07-20 | 2016-02-03 | 安庆市亿豪工贸发展有限公司 | Method for machining hydraulic piston rod for forklift |
| CN109253080B (en) * | 2017-07-12 | 2021-11-02 | 上海宝钢工业技术服务有限公司 | Long-life composite coating plunger for plunger pump |
| CN111500964A (en) * | 2020-04-30 | 2020-08-07 | 三一石油智能装备有限公司 | Preparation method of nodular cast iron plunger and plunger |
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| CN1413774A (en) * | 2002-09-09 | 2003-04-30 | 金科 | Preparation method of powder hot spray nano-material coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286646A (en) * | 1978-02-22 | 1981-09-01 | Goetze Ag | Method for inoculating or refining metal melts |
| JPS62161946A (en) * | 1986-01-10 | 1987-07-17 | Okamoto:Kk | Corrosion resistant structural parts |
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| Publication number | Publication date |
|---|---|
| CN1851033A (en) | 2006-10-25 |
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