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Powder for self-lubricating wear-resisting cobalt-base alloy clad through laser and technology method

A wear-resistant cobalt-based and cobalt-based alloy technology, which is applied in the coating process and coating of metal materials, can solve the problems of poor toughness and machinability, limited degree of surface strengthening of the roller surface, narrow application range, etc., and achieve self-lubricating Excellent wear resistance, good high temperature oxidation resistance, and broad engineering application prospects

Active Publication Date: 2018-10-26
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the induction heating quenching technology is limited to a certain depth of the surface layer, and the surface strengthening degree of the roll surface is limited, and it cannot guarantee that all quenched surfaces can obtain a uniform quenched layer
The surfacing repair technology is complicated, the productivity is low, and the heat input is large. The hot roll is prone to cracks, slag inclusions, welding spots and shedding during surfacing.
The efficiency and material utilization rate of thermal spraying repair technology are low, pores and residual stress are easy to exist on the repaired surface, the toughness and machinability are poor, and the bonding strength between the repaired layer and the hot roll is not good
The thermal spray welding repair technology requires that the thermal spray welding material must match the hot roll material, the application range is narrow, and it is easy to deform during the repair process

Method used

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  • Powder for self-lubricating wear-resisting cobalt-base alloy clad through laser and technology method
  • Powder for self-lubricating wear-resisting cobalt-base alloy clad through laser and technology method
  • Powder for self-lubricating wear-resisting cobalt-base alloy clad through laser and technology method

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preparation example Construction

[0040] A method for preparing a novel self-lubricating wear-resistant cobalt-based alloy cladding layer using the powder used for laser cladding self-lubricating wear-resistant cobalt-based alloys as described above, the steps of the preparation method are as follows:

[0041] 1) The cobalt-based alloy powder of the new cobalt-based alloy with the above components is vacuum smelted, gas atomized and sieved to obtain a spherical cobalt-based alloy powder; the spherical cobalt-based alloy powder is mixed with Ti 3 SiC 2 The powder is prepared by the solid-liquid phase reaction method and placed in the ball mill together. Use a vacuum pump to vacuumize the ball mill. When the vacuum degree reaches below -0.05MPa, fill in an inert gas. Stop injection when the pressure inside and outside the ball mill is consistent. Inert gas and ball milling, the duration of ball milling is 5-8 hours, and then the mixed powder is placed in a vacuum drying oven and dried at 80-120°C for 8-10 hours;...

Embodiment 1

[0049] Cobalt-based alloy powder by weight percentage is C: 0.2%, Cr: 23%, Ni: 2%, Si: 0.5%, Mo: 4%, Mn: 0.55%, and the rest is Co; cobalt-based alloy powder: 95% %, Ti 3 SiC 2 Powder: 5.0%; the particle size of the powder is between 80 mesh and 270 mesh. Cobalt-based alloy powder and Ti 3 SiC 2 The purity of the powder is not less than 99.9%, and the cobalt-based alloy powder and Ti 3 SiC 2 The particle size of the powder is between 80 mesh and 270 mesh.

[0050] The steps for preparing a new type of self-lubricating and wear-resistant cobalt-based alloy cladding layer using the above-mentioned powder for laser cladding self-lubricating and wear-resistant cobalt-based alloys are as follows:

[0051] 1) Spherical cobalt-based alloy powder prepared by vacuum air atomization method and Ti 3 SiC 2 The powder is 95% of cobalt-based alloy powder by weight, Ti 3 SiC 2 Proportion 5% of the powder and mix thoroughly, put them together in the ball mill, and use the vacuum pum...

Embodiment 2

[0056] Cobalt-based alloy powder by weight percentage is C: 0.22%, Cr: 25%, Ni: 2.3%, Si: 0.75%, Mo: 5%, Mn: 0.6%, and the rest is Co; cobalt-based alloy powder: 90 %, Ti 3 SiC 2 Powder: 10%; the particle size of the powder is between 80 mesh and 270 mesh. Cobalt-based alloy powder and Ti 3 SiC 2 The purity of the powder is not less than 99.9%, and the cobalt-based alloy powder and Ti 3 SiC 2 The particle size of the powder is between 80 mesh and 270 mesh.

[0057] The steps for preparing a new type of self-lubricating and wear-resistant cobalt-based alloy cladding layer using the above-mentioned powder for laser cladding self-lubricating and wear-resistant cobalt-based alloys are as follows:

[0058] 1) Spherical cobalt-based alloy powder prepared by vacuum air atomization method and Ti 3 SiC 2 The powder is 90% of cobalt-based alloy powder by weight percentage, Ti 3 SiC 2 Proportion 10% of the powder and mix thoroughly, put them together in the ball mill, and use t...

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Abstract

The invention provides powder for a self-lubricating wear-resisting cobalt-base alloy clad through laser and a technology method. The powder comprises cobalt-base alloy powder and Ti3SiC2 powder. Thecobalt-base alloy powder comprises, by weight percent, 0.2-0.25% of C, 23.0-26.0% of Cr, 2.0-2.5% of Ni, 0.50-1.0% of Si, 4-5.5% of Mo, 0.55-0.65% of Mn and the balance Co. The powder comprises 85-95%of the cobalt-base alloy powder and 5.0-15.00% of the Ti3SiC2 powder. The laser cladding technology is adopted, a CO2 laser device is utilized for carrying out laser cladding to prepare a novel self-lubricating wear-resisting cobalt-base alloy cladding layer, the prepared cobalt-base alloy cladding layer is uniform in microscopic structure, is well combined with low-alloy steel, and has the beneficial effects of being high in surface strength and hardness and excellent in wear-resisting performance, the novel powder and the corresponding technology method are provided for preparing the self-lubricating wear-resisting cobalt-base alloy cladding layer through laser cladding, and the powder and the method can be widely applied to laser preparation and re-preparation of rolling rollers in themetallurgy industry.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a self-lubricating and wear-resistant laser cladding cobalt-based alloy cladding layer suitable for the protection and re-preparation of the surface of important consumable parts such as rolls and bushings. Powder and cladding layer preparation process. Background technique [0002] Metallurgical hot roll is an important part of steel rolling equipment in iron and steel enterprises. The quality and service life of the roll directly affect the production efficiency of the rolling mill and the quality of the rolled product. Since the hot roll is in direct contact with the red hot steel at a temperature of 1000-1100°C during service, and is forced to cool by cold water at room temperature, after serving for a period of time in this thermally alternating environment, the roll will behave as follows Failure mode: surface thermal cracks caused by thermal fatigu...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/07C22C32/00
CPCC22C19/07C22C32/0052C23C24/103
Inventor 张春华李响张松赵超越徐韵华张瀚方
Owner SHENYANG POLYTECHNIC UNIV
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