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Powder used for laser cladding self-lubricating wear-resistant cobalt-based alloy and its process 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 roll 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: 2020-07-10
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 used for laser cladding self-lubricating wear-resistant cobalt-based alloy and its process method
  • Powder used for laser cladding self-lubricating wear-resistant cobalt-based alloy and its process method
  • Powder used for laser cladding self-lubricating wear-resistant cobalt-based alloy and its process method

Examples

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preparation example Construction

[0040] A method for preparing a self-lubricating and wear-resistant cobalt-based alloy cladding layer using the powder used for laser cladding self-lubricating and 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 above-mentioned cobalt-based alloy 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; the cobalt-...

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 by weight The percentage is: 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 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 ...

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 by weight The percentage is: 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 self-lubricating and wear-resistant cobalt-based alloy cladding layer using the powder used 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 u...

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Abstract

The invention provides a powder and a process method for laser cladding self-lubricating and wear-resistant cobalt-based alloys, including cobalt-based alloy powder and Ti 3 SiC 2 Powder, cobalt-based alloy powder by weight percentage is C: 0.2‑0.25%, Cr: 23.0‑26.0%, Ni: 2.0‑2.5%, Si: 0.50‑1.0%, Mo: 4‑5.5%, Mn: 0.55 ‑0.65%, the rest is Co; cobalt-based alloy powder by weight percentage: 85‑95%, Ti 3 SiC 2 Powder: 5.0‑15.00%. Using laser cladding technology, using CO 2 The self-lubricating and wear-resistant cobalt-based alloy cladding layer is prepared by laser laser cladding. The prepared cobalt-based alloy cladding layer has a uniform microstructure, is well combined with low-alloy steel, and has high surface strength, hardness, and excellent wear resistance. Features, providing a powder and corresponding process method for preparing self-lubricating wear-resistant cobalt-based alloy cladding layer by laser cladding, which can be widely used in laser preparation and re-preparation of rolls in the metallurgical 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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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/07C22C32/00
CPCC22C19/07C22C32/0052C23C24/103
Inventor 张春华张瀚方张松李响赵超越徐韵华
Owner SHENYANG POLYTECHNIC UNIV
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