CN104878382A - Alloy powder for laser cladding and method for laser cladding alloy powder - Google Patents
Alloy powder for laser cladding and method for laser cladding alloy powder Download PDFInfo
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- CN104878382A CN104878382A CN201510276462.0A CN201510276462A CN104878382A CN 104878382 A CN104878382 A CN 104878382A CN 201510276462 A CN201510276462 A CN 201510276462A CN 104878382 A CN104878382 A CN 104878382A
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Abstract
The invention relates to the technical field of laser surface treatment and particularly discloses alloy powder for laser cladding and a method for laser cladding the alloy powder. The alloy powder for laser cladding comprises the following components in percentage by weight: 23-30% of TiC, 1-2% of free C and the balance of Ni 60. The alloy powder for laser cladding contains higher contents of C, Si, B and the like, so that a cladding layer has high temperature resistance, high abrasion resistance, high hardness, compact texture, refined grain and fewer pores and cracks; with adoption of the method for laser cladding the alloy powder, the working stability of a workpiece can be greatly improved, and the production cost can be effectively reduced.
Description
Technical field
The present invention relates to laser surface hardening technology field, particularly relate to a kind of method of laser melting coating alloy powder material and this powder of laser melting coating.
Background technology
Laser melting coating is the process for modifying surface of a kind of advanced person, it utilizes high energy laser beam to make to be added on the metal_based material on surface and the skin layer fusing of base material, formed and there is specific function and low dilution rate and be combined into the coating of metallurgical binding with base material, thus obtain the technology with the excellent properties such as wear-resisting, corrosion-resistant, anti-oxidant and high temperature resistant at surface of workpiece.Laser melting coating can prepare high performance coating on the material of low cost, so it can reduce energy consumption, cost-saving.What laser melting coating was formed is metallurgical binding, and compared with the surface-coated reinforcing process of routine, laser melting coating has following distinguishing feature:
1. cladding layer has the typical rapid solidification features such as dense structure, grain refining;
2. heat inputs and distorts less, and coating thinning ratio is low;
3. can carry out constituency cladding, materials consumption is few, has the remarkable ratio of performance to price;
4. laser beam can aim at inaccessible region and carries out cladding;
5. technological process easily is automated.
In recent years, along with the develop rapidly of Materials science, computer technology and Numeric Control Technology, the advantage that laser melting coating possesses and feature make this technology show huge application potential in the 3 D-printing direct forming etc. of part restore, function-graded material preparation and part.
The composite powder of self-fluxing alloyed powder and metal ceramic powder composition, can prepare ceramic particle reinforced metal base compound coating by laser melting and coating technique, the wear-resisting, corrosion-resistant, high temperature resistant of the obdurability of metal, good manufacturability and stupalith excellence and anti-oxidation characteristics combine by compound coating.Cladding composite powder is the study hotspot in current laser melting and coating technique field.TiC has the features such as high rigidity, high-modulus, high-melting-point, Thermodynamically stable, is thus widely used as the wild phase of matrix material.
Summary of the invention
(1) technical problem that will solve.
The object of the invention is the laser cladding method a kind of laser melting coating powdered alloy being provided for the deficiencies in the prior art and applying it, to improve the hardness on processed workpiece surface.
(2) technical scheme.
According to an aspect of the present invention, provide a kind of laser melting coating powdered alloy, it is made up of the Ni60 of the TiC of 23% ~ 30%, the free C of 1% ~ 2% and surplus by mass percentage.
Preferably, described Ni60 by mass percentage 0.6% ~ 1.0% C, 14% ~ 17% Cr, B, the Si of 3% ~ 4.5% of 2.5% ~ 4.5%, the Ni composition of the Fe of 12% ~ 15% and surplus.
According to another aspect of the present invention, additionally provide a kind of laser cladding method applying above-mentioned laser melting coating powdered alloy, the method comprises: the laser head of laser apparatus is aimed at and treated cladding workpiece surface; Coaxial carrier gas powder conveyer is utilized evenly to send into described laser melting coating powdered alloy to the workpiece surface that described laser head is aimed at; Described laser apparatus outgoing laser beam irradiation is in described cladding surface and melt described laser melting coating powdered alloy, makes described laser cladding powder form molten drop and treat cladding workpiece surface by the continuous cladding of desired trajectory in described, forms cladding coating; Described laser head scans at the workpiece surface of preset range, completes the continuous cladding of this preset range workpiece surface.
(3) beneficial effect.
As can be seen from technique scheme, the method for laser melting coating powdered alloy of the present invention and this powder of laser melting coating has following beneficial effect:
(1) elements such as C, Si, B containing high level in laser melting coating powdered alloy of the present invention, effectively can improve cladding layer hardness, the cladding layer hardness of acquisition can reach more than HRC50;
(2) Ni, Cr element containing high level in laser melting coating powdered alloy of the present invention, effectively can improve the rotproofness of cladding layer;
(3) laser melting coating powdered alloy element proportioning of the present invention and melting and coating process proper, the coating formation of acquisition is good, flawless and form good metallurgical binding with matrix.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the method for cladding alloy powder of the present invention.
Embodiment
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
Embodiment 1.
The laser melting coating powdered alloy of the present embodiment is made up of the Ni60 of the TiC of 30%, the free C and 68% of 2% by mass percentage, and wherein Ni60 is made up of the C of 1%, Cr, B, the Si of 4% of 3%, the Ni of the Fe of 14% and 64% of 14% by massfraction.
Embodiment 2.
The cladding alloy powder of the present embodiment is made up of the Ni60 of the TiC of 28%, the free C and 71% of 1% by mass percentage, and wherein Ni60 is made up of the C of 1%, Cr, B, the Si of 4.5% of 4.5%, the Ni of the Fe of 12% and 63% of 15% by massfraction.
Embodiment 3.
The cladding alloy powder of the present embodiment is made up of the Ni60 of the TiC of 25%, the free C and 73% of 2% by mass percentage, and wherein Ni60 is made up of the C of 2%, Cr, B, the Si of 3% of 3%, the Ni of the Fe of 13% and 63% of 16% by massfraction.
The element added in described laser melting coating powdered alloy has respective effect, Ni can dissolve a lot of alloying elements, and can good structure stability be kept, it can form the orderly intermetallic compound of coherence, makes cladding layer have higher hot strength; Cr unit have solution strengthening and passivation, and it can improve corrosion resistance nature and high temperature oxidation resistance, unnecessary Cr easily and C, B form hard phase, thus hardness and the wear resistance of cladding layer can be improved; A small amount of Si and B element have deoxidation and reduction and slag making function, have sclerosis strengthening effect to cladding layer; TiC is the main hard phase of cladding layer, can significantly improve hardness and the wear resistance of cladding layer; The uncombined carbon of trace can crystal grain thinning, reduces pore and the crackle of cladding layer, improves a lot to the overall performance of cladding layer.
Described in the laser melting coating of the embodiment of the present invention, the particular content of the method for powdered alloy is.
Steps A, the surface of the laser head alignment pieces of laser apparatus.
Laser apparatus can select diode pumped solid state laser, CO
2laser apparatus and semiconductor laser.
Step B, the workpiece surface aimed to laser head evenly sends into laser melting coating powdered alloy.
Laser melting coating powdered alloy is preheated to 120 DEG C of insulation 2-4 hour before sending, carry out drying and processing.
Powdered alloy can select synchronous side to or synchronous coaxial powder-feeding mode send.When synchronous side is to powder feeding, the direction of relative movement of powder feeding direction, laser incident direction, workpiece is in same plane.During coaxial powder-feeding, powder feeding direction is identical with laser incident direction.
According to sweep velocity adjustment powder sending quantity, keep powder sending quantity/sweep velocity substantially to remain unchanged, thus ensure to form good cladding coating, make individual layer cladding thickness maintain between 0.5mm ~ 1mm, so can suppress the formation of the defect such as coating crack, pore.Preferably, laser scanning speed is 120 ~ 300mm/min, and the rate of delivery of powdered alloy is 20 ~ 40g/min.
Step C, laser apparatus sends the above-mentioned laser melting coating powdered alloy of laser fusion, forms cladding coating on the surface of workpiece.
Laser output power needs to be greater than 3000W.When laser power increases, can suitably increase laser scanning speed and defocusing amount, guaranteed power/facula area and power/sweep velocity keep stable.Preferably, the power of laser apparatus is between 3000W ~ 6000W, and laser facula is the round spot of diameter 3mm ~ 5mm.
Step D, laser head scans at the workpiece surface of preset range, realizes the continuous cladding of this preset range workpiece surface.
When workpiece is cylindrical: workpiece first should be made to rotate along X axle, and then make laser head along the surface of X axle moving sweep workpiece again, wherein, X axle is the direction of Workpiece length.
When workpiece is plate shaped: laser head moves to designated length along X axle, laser shutdown, and laser head moves to next starting point, continue Emission Lasers scanning workpiece, the coating that laser single pass is formed is single track cladding coating, and wherein, X axle is the direction being parallel to workpiece.Scanning pattern is the line segment of side by side parallel.
Preferably, current pass cladding coating meeting front road, cover part coating, forms overlap joint.Overlapping rate is 30%.
In addition, the above-mentioned definition to each element, method is not limited in various concrete structures, shape or the method mentioned in embodiment, those of ordinary skill in the art can replace it with knowing simply, such as: laser melting coating powdered alloy of the present invention also can be used for the laser melting coating of other shaped metal matrix.
In sum, the invention provides a kind of laser melting coating powdered alloy and apply its laser cladding method.Column that cladding obtains has good plasticity to utilize laser melting coating powdered alloy of the present invention to carry out, coating not easily cracks defect, good metallurgical binding can be formed with metallic matrix, there is higher hardness and corrosion resistance nature, especially, coating hardness can reach more than HRC50, has a good application prospect.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a laser melting coating powdered alloy, is characterized in that, it is made up of the Ni60 of the TiC of 23% ~ 30%, the free C of 1% ~ 2% and surplus by mass percentage.
2. laser melting coating powdered alloy according to claim 1, is characterized in that, described Ni60 is made up of the C of 0.6% ~ 1.0%, Cr, B, the Si of 3% ~ 4.5% of 2.5% ~ 4.5%, the Ni of the Fe of 12% ~ 15% and surplus of 14% ~ 17% by mass percentage.
3. laser melting coating powdered alloy according to claim 1, is characterized in that, its granularity is between-140 ~+320 orders.
4. according to the laser cladding method of the powdered alloy of laser melting coating described in claim 1, it is characterized in that, meet following steps:
The laser head of laser apparatus is aimed at and is treated cladding workpiece surface;
Coaxial carrier gas powder conveyer is utilized evenly to send into described laser melting coating powdered alloy to the workpiece surface that described laser head is aimed at;
Described laser apparatus outgoing laser beam irradiation is in described cladding surface and melt described laser melting coating powdered alloy, makes described laser cladding powder form molten drop and treat cladding workpiece surface by the continuous cladding of desired trajectory in described, forms cladding coating;
Described laser head scans at the workpiece surface of preset range, completes the continuous cladding of this preset range workpiece surface.
5. laser cladding method according to claim 4, it is characterized in that, the described workpiece surface aimed to laser head is evenly sent in the step of described laser melting coating powdered alloy, and the amount sending into powdered alloy meets individual layer cladding thickness between 0.5mm ~ 1mm.
6. laser cladding method according to claim 4, is characterized in that, laser scanning speed is 120 ~ 300mm/min, and the powder feeding rate of described laser melting coating powdered alloy is 20 ~ 40g/min.
7. laser cladding method according to claim 4, is characterized in that, described laser power is greater than 3000W, and laser facula is the round spot of diameter 3mm ~ 5mm.
8. laser cladding method according to claim 4, is characterized in that, is argon gas to the shielding gas of cladding layer in described laser cladding process.
9. laser cladding method according to claim 4, is characterized in that, the described workpiece surface aimed to laser head also comprises before evenly sending into the step of described laser melting coating powdered alloy:
Described laser melting coating powdered alloy is preheated to 120 DEG C of insulation 2-4 hour, carries out drying and processing;
Described workpiece surface is carried out oil removing, rust cleaning and thermal pretreatment.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420723A (en) * | 2015-11-24 | 2016-03-23 | 平高集团有限公司 | Laser-cladding material and preparation method thereof, aluminum bronze base surface modification material and preparation method thereof |
| CN105624470A (en) * | 2015-12-09 | 2016-06-01 | 机械科学研究总院先进制造技术研究中心 | Iron-nickel-based composite alloy powder for laser cladding and laser cladding method of powder |
| CN107502891A (en) * | 2017-09-27 | 2017-12-22 | 杨沁玥 | A kind of laser melting and coating process |
| CN109371393A (en) * | 2018-11-05 | 2019-02-22 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind of laser melting coating gear reconstruction restorative procedure |
| CN109576603A (en) * | 2019-01-30 | 2019-04-05 | 沈阳大陆激光工程技术有限公司 | A kind of laser melting coating repairs the functional layer alloy powder and method of finish rolling De-scaling box pinch roller |
| CN112144056A (en) * | 2020-08-28 | 2020-12-29 | 西安交通大学 | Nickel-based composite coating applied to austenitic stainless steel and preparation method thereof |
| CN112322996A (en) * | 2020-10-19 | 2021-02-05 | 中国科学院半导体研究所 | Alloy powder for steel rail laser cladding strengthening and laser cladding method |
| CN115613028A (en) * | 2022-07-06 | 2023-01-17 | 北京机科国创轻量化科学研究院有限公司 | Laser cladding alloy powder based on aluminum bronze alloy surface and laser cladding method |
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| JP2004018886A (en) * | 2002-06-12 | 2004-01-22 | Toshiba Mach Co Ltd | Corrosion resistant and wear resistant member and method of producing the same |
| CN102962447A (en) * | 2012-11-20 | 2013-03-13 | 汕头大学 | Titanium carbide metal ceramic powder and method for laser cladding of powder |
| CN102978444A (en) * | 2012-11-27 | 2013-03-20 | 大连理工大学 | Nanocarbon clad titanium carbide enhanced nickel-based composite coating material and laser cladding process thereof |
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| JP2004018886A (en) * | 2002-06-12 | 2004-01-22 | Toshiba Mach Co Ltd | Corrosion resistant and wear resistant member and method of producing the same |
| CN102962447A (en) * | 2012-11-20 | 2013-03-13 | 汕头大学 | Titanium carbide metal ceramic powder and method for laser cladding of powder |
| CN102978444A (en) * | 2012-11-27 | 2013-03-20 | 大连理工大学 | Nanocarbon clad titanium carbide enhanced nickel-based composite coating material and laser cladding process thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420723A (en) * | 2015-11-24 | 2016-03-23 | 平高集团有限公司 | Laser-cladding material and preparation method thereof, aluminum bronze base surface modification material and preparation method thereof |
| CN105420723B (en) * | 2015-11-24 | 2018-11-02 | 平高集团有限公司 | A kind of laser cladding of material and preparation method thereof, aluminium bronze primary surface modified material and preparation method thereof |
| CN105624470A (en) * | 2015-12-09 | 2016-06-01 | 机械科学研究总院先进制造技术研究中心 | Iron-nickel-based composite alloy powder for laser cladding and laser cladding method of powder |
| CN107502891A (en) * | 2017-09-27 | 2017-12-22 | 杨沁玥 | A kind of laser melting and coating process |
| CN109371393A (en) * | 2018-11-05 | 2019-02-22 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind of laser melting coating gear reconstruction restorative procedure |
| CN109576603A (en) * | 2019-01-30 | 2019-04-05 | 沈阳大陆激光工程技术有限公司 | A kind of laser melting coating repairs the functional layer alloy powder and method of finish rolling De-scaling box pinch roller |
| CN109576603B (en) * | 2019-01-30 | 2020-07-24 | 沈阳大陆激光工程技术有限公司 | Functional layer alloy powder and method for repairing pinch roll of finish rolling descaling box through laser cladding |
| CN112144056A (en) * | 2020-08-28 | 2020-12-29 | 西安交通大学 | Nickel-based composite coating applied to austenitic stainless steel and preparation method thereof |
| CN112144056B (en) * | 2020-08-28 | 2021-12-28 | 西安交通大学 | Nickel-based composite coating applied to austenitic stainless steel and preparation method thereof |
| CN112322996A (en) * | 2020-10-19 | 2021-02-05 | 中国科学院半导体研究所 | Alloy powder for steel rail laser cladding strengthening and laser cladding method |
| CN115613028A (en) * | 2022-07-06 | 2023-01-17 | 北京机科国创轻量化科学研究院有限公司 | Laser cladding alloy powder based on aluminum bronze alloy surface and laser cladding method |
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