CN104195546A - High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding - Google Patents
High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding Download PDFInfo
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- CN104195546A CN104195546A CN201410423422.XA CN201410423422A CN104195546A CN 104195546 A CN104195546 A CN 104195546A CN 201410423422 A CN201410423422 A CN 201410423422A CN 104195546 A CN104195546 A CN 104195546A
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Abstract
The invention relates to the technical field of metal surface hardening treatment and in particular relates to high-hardness cobalt-based alloy powder for laser cladding and a preparation technology of the high-hardness cobalt-based alloy powder for laser cladding. According to the technical scheme, the high-hardness cobalt-based alloy powder for the laser cladding is prepared from the following components in percentage by weight: 1.2-1.55% of C, 28-31% of Cr, less than or equal to 3% of Fe, less than or equal to 0.5% of Mn, less than or equal to 1% of Mo, less than or equal to 3% of Ni, 0.7-1.5% of Si, 3.5-6.5% of W and the balance of Co. The preparation technology of the high-hardness cobalt-based alloy powder for the laser cladding comprises the following steps: a, preparing the components, and smelting; b, slagging and deoxidizing the smelted components obtained in the step a; c, preparing the components obtained in the step b into powder; d, collecting the powdery components obtained in the step c; and e, sieving the cooled powdery components obtained in the step d. By adopting the technical scheme, the high-hardness cobalt-based alloy powder, which hardly cracks, is hardly oxidized, is extremely low in porosity, has good self fluxing performance, is used for the laser cladding, and a preparation technology of the high-hardness cobalt-based alloy powder are provided.
Description
Technical field
The present invention relates to technique for hardening treatment field, a kind of metallic surface, particularly high rigidity Co-based alloy powder and preparation technology thereof for a kind of laser melting coating.
Background technology
The general environment being all oxidized for corrosion-resistant and high-temperature resistant of cobalt base alloy, but because the production cost of cobalt is higher, whole material is selected cobalt base alloy, will make the product prices such as valve higher.In order to retain cobalt base alloy erosion resistance high temperature oxidation resisting and high rigidity (wear resistance), reduce the market competitiveness of component.The technique of employing laser melting coating in metallic surface, makes cobalt base alloy remelting metallic surface obtain hardening treatment, thereby has had wear resistance and the high temperature oxidation resisting erosion resistance of cobalt base alloy.In addition, for the life cycle that extends cobalt base alloy parts is to reach the object of reduction equipment use cost, generally adopt laser melting and coating technique to repair the equipment of these wearing and tearing.
Laser melting and coating technique refers to different addition meanss carries the coated material of selecting on by the matrix of cladding, after laser irradiation, make it and matrix surface fusing, through rapid solidification form low dilution rate, be the technological process of the top coat of metallurgical binding with matrix.Compare as plating, oxyacetylene welding, supersonic spray coating etc. with traditional surface hardening treatment technology, laser melting and coating technique has that microstructure of surface cladding layer crystal grain is tiny, cladding layer be combined into the advantages such as metallurgical binding, heat affected zone and distorted area are little.Particularly laser melting coating can obtain high performance alloy cladding layer, have the features such as wear resistance, hardness, corrosion resistance nature, antioxidant property, thermal boundary performance, anti-cavitation erosion and erosive wear, so this technology has broad application prospects industrial.But cobalt base alloy cladding layer will keep higher hardness, so be prone to cracking during cladding, be oxidized, occur pore, the problem such as self-fluxing nature is poor.
Summary of the invention
The deficiency existing for prior art, the invention provides a kind of difficult pore that ftractures, is oxidized, produces, high rigidity Co-based alloy powder and preparation technology thereof for laser melting coating that self-fluxing nature is good.
For achieving the above object, the invention provides following technical scheme: a kind of laser melting coating high rigidity cobalt-based alloy powder, is characterized in that: each composition weight percent concentration is: C:1.2-1.55%; Cr:28-31%; Fe :≤3%; Mn :≤0.5%; Mo :≤1%; Ni :≤3%; Si:0.7-1.5%; W:3.5-6.5%; Surplus Co.
Powdered alloy particle diameter is 100/270 order.
The preparation method of high rigidity cobalt-based alloy powder for laser melting coating, is characterized in that: step is as follows: the batching of each composition in a, preparation power 1, and adopt special furnace to implement melting to this batching;
B, the batching of entering melting in step a is carried out to slag making and deoxidation treatment;
C, the batching that process step b is processed adopt powder by atomization method batching to be manufactured Powdered;
D, the powdered ingredient in step c is collected, and it is implemented cooling under the environment of anaerobic or hypoxemia;
E, will in steps d, through overcooled powdered ingredient, sieve, for metal-powder of the same race, screen underflow can be used as and melts down powder and be used.
Wherein, the melting in step a is to carry out under 1-10Pa condition in vacuum tightness, and temperature is 1800 ℃-2700 ℃.
While adopting powder by atomization method in step c, take nitrogen as atomizing medium, and under 8-10 normal atmosphere, atomization is 5-10 minutes.
In order to guarantee the overall performance of cladding layer, as wear resistance, mechanical property, physicals and chemical property etc., and effectively prevent crackle, consider the cost of cladding alloy simultaneously, determine that selected alloying constituent is C, Cr, Fe, Mn, Mo, Ni, Si, W, Co and a small amount of rare earth oxide.Wherein, for effect and the erosion resistance of warranty test, for Co-based alloy powder, wherein the content of Cr, Co, C is strictly controlled; In order to improve the hardness of cladding layer and to increase wear resistance, and self-fluxing nature, determine to add appropriate B, Si, Mn and rare earth oxide in powdered alloy.Laser melting coating of the present invention is not only corrosion-resistant but also have higher hardness with high rigidity Co-based alloy powder, laser cladding layer after processing has the advantages such as flawless, pore-free, inclusion-free, dense structure, grain refining, and the surface hardening that is widely used in the component such as valve sealing face, the rotor diameter of axle, rotor of helical lobe compressor is processed and maintenance.The consumption that can reduce strategic rare elements simultaneously, significantly reduces laser melting coating cost.
Embodiment
Embodiment 1:
1, test materials: base material is ASTM A182 F304.
2, laser cladding of material:
Composition is (by weight percentage): C:1.2%; Cr:28%; Fe: 3%; Mn:0.04%; Mo:1%; Ni:3%; Si:0.7%; W:3.5%; Surplus Co.
3, ready batching is carried out to melting, melting is to carry out under 1Pa condition in vacuum tightness,
Temperature is 1800 ℃, and every stove Melting Quality is 50KG.Batching after melting is carried out to slag making and deoxidation treatment, then adopt powder by atomization method that batching is manufactured Powdered, in this process, take nitrogen as atomizing medium, under 8Pa normal atmosphere, atomization is 5 minutes, then under anaerobic or hypoxia, implement cooling, final sizing, obtains high rigidity Co-based alloy powder.
4, laser melting and coating process, adopts laser melting coating machine, and power is 3km, and speed is 5mm/s,
Spot diameter is 5mm, and overlapping rate is 30%, and laser melting coating layer thickness 1.0mm synchronously sends into the high rigidity Co-based alloy powder completing of processing.
5, cladding layer use properties detects.
The microhardness of cladding layer, concrete data see the following form.
The wear resisting property of cladding layer, concrete data see the following form.
The corrosion resistance nature of cladding layer, concrete data see the following form.
The quality of laser cladding layer: appearance surfaces is smooth, smooth; Colour check(test): do not find crackle, pore and slag inclusion.
Embodiment 2:
1, test materials: base material is ASTM A182 F304.
2, laser cladding of material:
Composition is (by weight percentage): C:1.55%; Cr:31%; Fe: 3%; Mn:0.05%; Mo:2%; Ni:4%; Si:1.5%; W:6.5%; Surplus Co.
3, ready batching is carried out to melting, melting is to carry out under 10Pa condition in vacuum tightness, and temperature is 2700 ℃, and every stove Melting Quality is 50KG.Batching after melting is carried out to slag making and deoxidation treatment, then adopt powder by atomization method that batching is manufactured Powdered, in this process, take nitrogen as atomizing medium, under 10Pa normal atmosphere, atomization is 8 minutes, then under anaerobic or hypoxia, implement cooling, final sizing, obtains high rigidity Co-based alloy powder.
4, laser melting and coating process, adopts laser melting coating machine, and power is 4km, and speed is 10mm/s, and spot diameter is 6mm, and overlapping rate is 40%, and laser melting coating layer thickness 1.0mm synchronously sends into the high rigidity Co-based alloy powder completing of processing.
5, cladding layer use properties detects.
The microhardness of cladding layer, concrete data see the following form.
The wear resisting property of cladding layer, concrete data see the following form.
The corrosion resistance nature of cladding layer, concrete data see the following form.
The quality of laser cladding layer: appearance surfaces is smooth, smooth; Colour check(test): do not find crackle, pore and slag inclusion.
The product that adopts batching of the present invention and complete processing to obtain, the hardness of laser cladding layer is HV (0.2) 450-600; Wear resisting property is 3-4 times of base material; Corrosion resistance nature, significantly better than base material, has improved approximately 30%.
6, practical application example:
The present invention is widely used in the surface hardening of the component such as valve sealing face, the rotor diameter of axle, rotor of helical lobe compressor and processes and maintenance.
Claims (5)
1. a laser melting coating high rigidity cobalt-based alloy powder, is characterized in that: each composition weight percent concentration is: C:1.2-1.55%; Cr:28-31%; Fe :≤3%; Mn :≤0.5%; Mo :≤1%; Ni :≤3%; Si:0.7-1.5%; W:3.5-6.5%; Surplus Co.
2. laser melting coating according to claim 1 high rigidity cobalt-based alloy powder, is characterized in that: described powdered alloy particle diameter is 100/270 order.
3. the preparation method of high rigidity cobalt-based alloy powder for laser melting coating according to claim 1, is characterized in that: step is as follows: the batching of each composition in 1 is weighed in a, preparation, and adopts special furnace to implement melting to this batching;
B, the batching of entering melting in step a is carried out to slag making and deoxidation treatment;
C, the batching that process step b is processed adopt powder by atomization method batching to be manufactured Powdered;
D, the powdered ingredient in step c is collected, and it is implemented cooling under the environment of anaerobic or hypoxemia;
E, will in steps d, through overcooled powdered ingredient, sieve, for metal-powder of the same race, screen underflow can be used as and melts down powder and be used.
4. the preparation method of high rigidity cobalt-based alloy powder for laser melting coating according to claim 3, is characterized in that: the melting in step a is to carry out under 1-10Pa condition in vacuum tightness, and temperature is 1800 ℃-2700 ℃.
5. the preparation method with high rigidity cobalt-based alloy powder according to the laser melting coating described in claim 3 or 4, is characterized in that: while adopting powder by atomization method in step c, take nitrogen as atomizing medium, under 8-10 normal atmosphere, atomization is 5-10 minutes.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779995A (en) * | 2014-12-25 | 2016-07-20 | 丹阳宏图激光科技有限公司 | Laser repairing process for flat department collar |
| CN106676518A (en) * | 2016-12-25 | 2017-05-17 | 首钢总公司 | Laser remanufacturing method for metal structural part |
| CN106702371A (en) * | 2015-07-15 | 2017-05-24 | 昆山鑫昌泰模具科技有限公司 | Laser cladding technology capable of prolonging life of H13 hot forging die |
| CN106756255A (en) * | 2016-11-30 | 2017-05-31 | 沈阳大陆激光成套设备有限公司 | A kind of wear-resistant coating that express elevator traction sheave is manufactured for laser |
| CN106756256A (en) * | 2016-12-29 | 2017-05-31 | 沈阳大陆激光工程技术有限公司 | One kind is used for big-and-middle-sized section roll laser composite manufacturing anti-attrition heat resistanceheat resistant Co-base alloy material |
| CN108555277A (en) * | 2018-04-19 | 2018-09-21 | 杭州盛镭激光科技有限公司 | A kind of cobalt-based alloy powder powder material for turbine blade Laser Alloying Treatment |
| CN110418688A (en) * | 2017-03-14 | 2019-11-05 | Vbn组件有限公司 | High-carbon content cobalt-base alloys |
| CN112760640A (en) * | 2020-12-25 | 2021-05-07 | 重庆机电增材制造有限公司 | Valve core of regulating valve and laser strengthening manufacturing method thereof |
| CN113604709A (en) * | 2021-08-18 | 2021-11-05 | 沈阳大陆激光先进制造技术创新有限公司 | High-temperature-resistant press-in functional layer alloy material for laser composite manufacturing furnace roller and process method |
| CN115627389A (en) * | 2022-10-20 | 2023-01-20 | 河北安迪模具有限公司 | Manufacturing process for laser cladding of cobalt-based alloy powder by using small-opening pressure-blowing glass die punch |
| CN116411205A (en) * | 2023-03-10 | 2023-07-11 | 上海中洲特种合金材料股份有限公司 | Cobalt-base alloy powder for build-up welding of chain saw guide plate |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779995B (en) * | 2014-12-25 | 2018-08-07 | 丹阳宏图激光科技有限公司 | The laser repairing process of flat department's axle sleeve |
| CN105779995A (en) * | 2014-12-25 | 2016-07-20 | 丹阳宏图激光科技有限公司 | Laser repairing process for flat department collar |
| CN106702371A (en) * | 2015-07-15 | 2017-05-24 | 昆山鑫昌泰模具科技有限公司 | Laser cladding technology capable of prolonging life of H13 hot forging die |
| CN106756255A (en) * | 2016-11-30 | 2017-05-31 | 沈阳大陆激光成套设备有限公司 | A kind of wear-resistant coating that express elevator traction sheave is manufactured for laser |
| CN106676518A (en) * | 2016-12-25 | 2017-05-17 | 首钢总公司 | Laser remanufacturing method for metal structural part |
| CN106676518B (en) * | 2016-12-25 | 2019-07-02 | 首钢集团有限公司 | A kind of hardware laser remanufacturing method |
| CN106756256A (en) * | 2016-12-29 | 2017-05-31 | 沈阳大陆激光工程技术有限公司 | One kind is used for big-and-middle-sized section roll laser composite manufacturing anti-attrition heat resistanceheat resistant Co-base alloy material |
| CN110418688A (en) * | 2017-03-14 | 2019-11-05 | Vbn组件有限公司 | High-carbon content cobalt-base alloys |
| CN108555277A (en) * | 2018-04-19 | 2018-09-21 | 杭州盛镭激光科技有限公司 | A kind of cobalt-based alloy powder powder material for turbine blade Laser Alloying Treatment |
| CN112760640A (en) * | 2020-12-25 | 2021-05-07 | 重庆机电增材制造有限公司 | Valve core of regulating valve and laser strengthening manufacturing method thereof |
| CN113604709A (en) * | 2021-08-18 | 2021-11-05 | 沈阳大陆激光先进制造技术创新有限公司 | High-temperature-resistant press-in functional layer alloy material for laser composite manufacturing furnace roller and process method |
| CN115627389A (en) * | 2022-10-20 | 2023-01-20 | 河北安迪模具有限公司 | Manufacturing process for laser cladding of cobalt-based alloy powder by using small-opening pressure-blowing glass die punch |
| CN116411205A (en) * | 2023-03-10 | 2023-07-11 | 上海中洲特种合金材料股份有限公司 | Cobalt-base alloy powder for build-up welding of chain saw guide plate |
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Application publication date: 20141210 |