CN103060707B - Coating material for replacing hard chromium plating and laser-cladding preparation method thereof - Google Patents
Coating material for replacing hard chromium plating and laser-cladding preparation method thereof Download PDFInfo
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- CN103060707B CN103060707B CN201310000390.8A CN201310000390A CN103060707B CN 103060707 B CN103060707 B CN 103060707B CN 201310000390 A CN201310000390 A CN 201310000390A CN 103060707 B CN103060707 B CN 103060707B
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Abstract
The invention provides a coating material for replacing a hard chromium plating and a laser-cladding preparation method thereof and relates to the field of iron-base alloy super-hard coating materials. The coating material comprises the following components in percentage by mass: 0.8-1.0 wt% of C, 4.0-8.0 wt% of Cr, 2.0-3.0 wt% of Ni, 0.4-0.8 wt% of Si, 5.0-7.0 wt% of Mo, 6.0-10.0 wt% of W, 0.3-0.6 wt% of Mn and the balance of Fe. The preparation method comprises the following steps: using metal raw materials to prepare Fe-based powder by using a water atomization or gas atomization method; screening the Fe-based powder so as to obtain powder with a particle size range of 10-50 microns; selecting a part to be reinforced as a substrate; carrying out sand blasting treatment on a part area to be reinforced or repaired; removing particle impurities of the part by using compressed air; scrubbing the surface of the part by using alcohol; preparing a Fe-based coating on the surface of the part by using a laser-cladding process based on a synchronous powder feeding technology so as to reinforce or repair the part; and carrying out follow-up mechanical grinding machining on the Fe-based coating so as to machine the part with the part size and desired roughness. According to the invention, requirements of actual production on the performance, bonding strength and production efficiency of the coating are satisfied.
Description
Technical field
The present invention relates to a kind of ferrous alloy superhard coating material and preparation method thereof, more particularly hard chrome plating coated material of a kind of alternative traditional high pollution and preparation method thereof.
Background technology
In industries such as oil production, mining machinery, engineering machinery, coal mining industry, electric power, often require component to there is excellent wear resistance and corrosion resistance, special in the higher component of measure of precision, slight wearing and tearing or corrosion, to mean scrapping of part, therefore cause the wasting of resources of a large amount of noble metal materials.Hard Chromium Plating Technology is the wear-resistant and erosion-resisting approach of the raising material that conventionally adopts of current industrial enterprise.Its advantage be that chromium coating is even, hardness is high and anticorrosive, production efficiency is high and cost is low, its shortcoming is very large to the pollution of environment, and chromium coating and basal body binding force poor, in use often there is the problems such as bubbling, peeling.
At present, under the pressure of the pressure of environmental pollution, Hard Chromium Plating Technology is marched toward just gradually and is banned.Therefore, a kind of alternative chromed hardened coating preparation method is being sought by a lot of engineering departments.There is certain defect aspect coating binding force and coating compactness in hot-spraying techniques at present, and conventional technique for overlaying is larger to the heat affecting of base material when preparation coating.Laser melting and coating technique belongs to a kind of green processing method, laser cladding layer have organize fine and closely woven, composition evenly, coating and matrix metallurgical junction the advantage such as get togather.Yet the conventional laser cladding method based on circle hot spot, low sweep velocity, because its efficiency is compared with the low needs that can not meet industrial enterprise's scale operation.Aspect material system, coating Ni-based or cobalt-based is expensive, is not suitable for a large amount of products that consume.For the problems referred to above, the present invention has designed Fe base alloy coating material with low cost, and give full play to the advantage of laser melting and coating technique aspect coating performance and coating quality, break through conventional process characteristic and working efficiency, adopt large spot, superpower rapid scanning, significantly improve laser melting coating efficiency, meet the actual needs of producing.
Summary of the invention
For problems such as the high pollution of current traditional Hard Chromium Plating Technology technology and the bubbling in use procedure, peelings, invent a kind of chromed hardened cheap coated material and high efficiency laser melting coating preparation method of substituting, high-level efficiency obtains the coated material with matrix metallurgical binding and excellent performance, meets the needs of actual production to coating performance, bonding strength and production efficiency.
A kind of alternative chromed hardened coated material, it is characterized in that, each constituent mass per-cent of this coated material is as follows: C:0.8-1.0 wt%, Cr:4.0-8.0 wt%, Ni:2.0-3.0 wt%, Si:0.4-0.8 wt%, Mo:5.0-7.0 wt%, W:6.0-10.0 wt%, Mn:0.3-0.6 wt%, surplus Fe.
Above-mentioned a kind of laser melting coating preparation method who substitutes chromed hardened coated material, is characterized in that, comprises the following steps:
(1) by the mass percent of said components, choose raw metal;
(2) adopt the mode of water atomization or aerosolization to prepare Fe based powders with above-mentioned raw metal, after sieving, obtain the powder of 10-50 μ m size range;
(3) choose using the component that need to strengthen as matrix, to part wait strengthen or sandblasting is carried out in area to be repaired, and adopt pressurized air to remove degranulation foreign material, then use alcohol scrub surfaces;
(4) utilize the laser melting and coating process based on synchronous powder feeding system technology to prepare Fe base coating at piece surface, realize strengthening or the reparation of component, concrete technology parameter is set to: laser melting coating power is 8～10KW, adopt rectangular light spot, spot size is 12-20mm at length direction, and width is 2-4mm, and beam flying linear velocity is 1000～1500mm/min, powder feeder powder feeding rate is 80-120g/min, and laser cladding process adopts the argon shield that flow is 15～20L/min;
(5) follow-up abrasive machine processing, is machined to accessory size and desired roughness.
Positively effect of the present invention:
A kind of chromed hardened coated material and laser melting coating preparation method thereof of substituting provided by the invention, coating and body material are metallurgical binding, have overcome the shortcoming of chromium plating, and by high efficiency large-area laser cladding, meet the needs of actual production.Meanwhile, the designed cheap and high efficiency technological process of Fe base high-performance material price can be accepted by user, for manufacturing enterprise creates larger profit margin.
Embodiment
Embodiment 1
(1) choose typical Fe sill formula, C:0.8 wt%, Cr:4.0wt%, Ni:2.0wt%, Si:0.4wt%, Mo:5.0 wt%, W:6.0 wt%, Mn:0.3 wt%, surplus Fe;
(2) adopt the mode of argon gas atomization to obtain Fe base alloy powder, after sieving, obtain the powder of 10-50 μ m size range;
(3) choose heavy duty engine piston ring groove for strengthening object, piston material is 16CrMo4-4, to piston ring groove wait strengthen or sandblasting is carried out in area to be repaired, and adopt pressurized air to remove degranulation foreign material, then use alcohol scrub surfaces;
(4) utilize the laser melting and coating process based on synchronous powder feeding system technology to prepare Fe base coating at piece surface, realize strengthening or the reparation of piston ring groove, concrete technology parameter is set to: semiconductor laser output rating is 8 KW, rectangular light spot is of a size of 12 * 2 mm, beam flying linear velocity is 1500 mm/min, powder feeder powder feeding rate is 80 g/min, and it is the argon shield of 15 L/min that laser cladding process adopts flow;
(5) adopt diamond forming wheel grinding machining piston annular groove, laser melting coating district is machined to part technical requirements size, roughness reaches Ra0.4.
The Fe base alloy coat below the present embodiment being obtained carries out performance test.
1, corrosion experiment
To in YW/R-150 salt mist experiment case, carry out corrosion test without magnetic coating material, the mass concentration of NaCl is (5 ± 0.1) %, and pH value is 6.5 ~ 7.2, and the corrosion rate that obtains coated material is 0.38g/m
2h(test condition: 25 ℃ * 168h), there is good corrosion resistance nature.
2, microhardness
With HR-150A type Rockwell hardometer, coating sample is carried out to hardness test, multi-point sampler calculating mean value are carried out in laser cladding layer surface, its hardness value is HRC63.
Above data all illustrate Fe base alloy property excellence prepared by laser melting coating.
Embodiment 2
(1) choose typical Fe sill formula, C:0.90 wt%, Cr:6.0 wt%, Ni:2.5 wt%, Si:0.6 wt%, Mo:6.0 wt%, W:8.0 wt%, Mn:0.45wt%, surplus Fe;
(2) adopt the mode of water atomization to obtain Fe base alloy powder, after sieving, obtain the powder of 10-50 μ m size range;
(3) choose construction machinery industry piston rod as the object that need to strengthen, material is 45 steel, to part wait strengthen or sandblasting is carried out in area to be repaired, and adopt pressurized air to remove degranulation foreign material, then use alcohol scrub surfaces;
(4) utilize the laser melting and coating process based on synchronous powder feeding system technology to prepare Fe base coating at piston rod piece surface; realize strengthening or the reparation of component; concrete technology parameter is set to: laser melting coating power is 9 KW; adopt rectangular light spot; spot size is 16 * 3 mm at length direction; beam flying linear velocity is 1200 mm/min, and powder feeder powder feeding rate is 100 g/min, and it is the argon shield of 17 L/min that laser cladding process adopts flow.
(5) adopt diamond wheel grinding machining piston bar surface, laser melting coating district is machined to part technical requirements size, roughness reaches Ra0.4.
The Fe base alloy sample below the present embodiment being obtained carries out performance test:
1, corrosion experiment
Fe base coated material sample is placed in YW/R-150 salt mist experiment case and carries out corrosion test, and the mass concentration of NaCl is (5 ± 0.1) %, and pH value is 6.5 ~ 7.2, and the corrosion rate that obtains coated material is 0.32g/m
2h(test condition: 25 ℃ * 168h), there is good corrosion resistance nature.
2, microhardness
With HR-150A type Rockwell hardometer, coating sample is carried out to hardness test, multi-point sampler calculating mean value are carried out in laser cladding layer surface, its hardness value is HRC65.
Above data all illustrate Fe base alloy property excellence prepared by laser melting coating.
Embodiment 3
(1) choose typical Fe sill formula, C:1.0 wt%, Cr:8.0 wt%, Ni:3.0 wt%, Si:0.8 wt%, Mo:7.0 wt%, W:10.0 wt%, Mn:0.6 wt%, surplus Fe;
(2) adopt the mode of argon gas atomization to obtain Fe base alloy powder, after sieving, obtain the powder of 10-50 μ m size range;
(3) choosing coal machine profession hydraulic prop is laser reinforcing object, and material is 27SiMn, to part wait strengthen or sandblasting is carried out in area to be repaired, and adopt pressurized air to remove degranulation foreign material, then use alcohol scrub surfaces;
(4) utilize the laser melting and coating process based on synchronous powder feeding system technology to prepare Fe base coating at hydraulic prop piece surface laser melting coating; realize strengthening or the reparation of component; concrete technology parameter is set to: CO2 laser output power is 10 KW; rectangular light spot is of a size of 20 mm * 4 mm; beam flying linear velocity is 1000 mm/min; powder feeder powder feeding rate is 120 g/min, and it is the argon shield of 20 L/min that laser cladding process adopts flow.
(5) adopt diamond wheel grinding machining piston bar surface, laser melting coating district is machined to part technical requirements size, roughness reaches Ra0.4.
The Fe base alloy sample below the present embodiment being obtained carries out various performance tests.
1, corrosion experiment
Fe base coated material sample is placed in YW/R-150 salt mist experiment case and carries out corrosion test, and the mass concentration of NaCl is (5 ± 0.1) %, and pH value is 6.5 ~ 7.2, and the corrosion rate that obtains coated material is 0.29g/m
2h(test condition: 25 ℃ * 168h), there is good corrosion resistance nature.
2, microhardness
With HR-150A type Rockwell hardometer, coating sample is carried out to hardness test, multi-point sampler calculating mean value are carried out in laser cladding layer surface, its hardness value is HRC67.
Above data all illustrate Fe base alloy property excellence prepared by laser melting coating.
Claims (1)
1. a preparation method who substitutes chromed hardened coated material, each constituent mass per-cent of this coated material is as follows: C:0.8-0.9wt%, Cr:4.0-8.0wt%, Ni:2.0-3.0wt%, Si:0.4-0.8wt%, Mo:5.0-7.0wt%, W:6.0-10.0wt%, Mn:0.3-0.6wt%, surplus Fe; It is characterized in that, comprise the following steps:
(1) by the mass percent of said components, choose raw metal;
(2) adopt the mode of water atomization or aerosolization to prepare Fe based powders with above-mentioned raw metal, after sieving, obtain the powder of 10-50 μ m size range;
(3) choose using the component that need to strengthen as matrix, to part wait strengthen or sandblasting is carried out in area to be repaired, and adopt pressurized air to remove degranulation foreign material, then use alcohol scrub surfaces;
(4) utilize the laser melting and coating process based on synchronous powder feeding system technology to prepare Fe base coating at piece surface, realize strengthening or the reparation of component, concrete technology parameter is set to: laser melting coating power is 8～10kW, adopt rectangular light spot, spot size is 12-20mm at length direction, and width is 2-4mm, and beam flying linear velocity is 1000～1500mm/min, powder feeder powder feeding rate is 80-120g/min, and laser cladding process adopts the argon shield that flow is 15～20L/min;
(5) follow-up abrasive machine processing, is machined to accessory size and desired roughness.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103436878B (en) * | 2013-07-29 | 2016-01-06 | 燕山大学 | A kind of laser melting coating strengthening jaw and preparation method thereof |
| CN104120424B (en) * | 2013-08-01 | 2016-10-05 | 天津大学 | Iron based laser cladding powder and cladding layer preparation method |
| CN105316569A (en) * | 2015-12-02 | 2016-02-10 | 苏州莱测检测科技有限公司 | High-strength cast iron alloy for milling machine |
| CN111485137B (en) * | 2020-05-19 | 2021-11-05 | 北京工业大学 | Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod |
| CN112553618A (en) * | 2020-12-02 | 2021-03-26 | 江西省科学院应用物理研究所 | Method for repairing surface pits of cathode titanium roller for electrolytic copper foil forming machine |
| CN112575325B (en) * | 2020-12-10 | 2022-07-19 | 北京工业大学 | Laser online composite regulation and control method for improving rolling contact fatigue strength of steel rail |
| CN114875401B (en) * | 2022-06-20 | 2023-08-08 | 济宁学院 | Surface modification method for high-pressure hydraulic pump gear shaft |
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| CN101338428A (en) * | 2008-08-07 | 2009-01-07 | 沈阳大陆激光成套设备有限公司 | Strengthen process for pick head by laser fusing and coating wear-resistant coating |
| CN101403085A (en) * | 2008-11-14 | 2009-04-08 | 北京工业大学 | WC-FeNiCr superhard non-magnetic coating composite material and method of producing the same |
| CN102560222A (en) * | 2012-01-05 | 2012-07-11 | 北京工业大学 | WC-NiCrMoAl ultrahard non-magnetic coating composite and preparation method thereof |
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| JP2006326596A (en) * | 2005-05-23 | 2006-12-07 | Hitachi Metals Ltd | Sleeve for compacting machine |
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| EP1897650A2 (en) * | 2006-09-08 | 2008-03-12 | Vacuumschmelze GmbH & Co. KG | Nickel-iron based soldering material and soldering method |
| CN101338428A (en) * | 2008-08-07 | 2009-01-07 | 沈阳大陆激光成套设备有限公司 | Strengthen process for pick head by laser fusing and coating wear-resistant coating |
| CN101403085A (en) * | 2008-11-14 | 2009-04-08 | 北京工业大学 | WC-FeNiCr superhard non-magnetic coating composite material and method of producing the same |
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