Method for preparing dual-scale iron-based composite gradient coating based on high-speed laser cladding method

A technology of laser cladding and gradient coating, applied in coating, metal material coating process, etc., can solve the problem of low bonding force of dual-scale gradient coating, and achieve good structural stability, high overall hardness and high hardness Effect

Pending Publication Date: 2021-09-03
XIAN UNVERSITY OF ARTS & SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to provide a method for preparing a dual-scale iron-based composite gradient coating based on a high-speed laser cladding method, which solves the difficulty in regulating the structure of the composite gradient cladding layer prepared by traditional laser cladding, and the surface shape The problems of low precision and easy cracking of the coating overcome the problems of low bonding force and large porosity of the dual-scale gradient coating prepared by thermal spraying, and significantly improve the wear resistance of the coating, thereby prolonging the life of the clad part;

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  • Method for preparing dual-scale iron-based composite gradient coating based on high-speed laser cladding method
  • Method for preparing dual-scale iron-based composite gradient coating based on high-speed laser cladding method
  • Method for preparing dual-scale iron-based composite gradient coating based on high-speed laser cladding method

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Embodiment 1

[0045] In this embodiment, the material of the base material is 27SiMn steel, which is mostly used in hydraulic supports for coal mining, and is prone to wear and failure during service. The traditional treatment method is to use electroplating Cr for surface protection, but the bonding between the coating and the base is poor. , At the same time, the electroplating technology pollutes the environment a lot.

[0046] In this embodiment, by performing high-speed laser cladding surface strengthening on 27SiMn steel, a high wear-resistant composite gradient coating can be formed to improve the performance of 27SiMn steel and prolong the service life, including the following steps:

[0047] (1) Fe-based powder, TiC powder, Ti powder and C powder are selected for doping in different proportions. The parts by weight of each component in the mixed powder are as follows: 90 parts of Fe-based powder (17.0% Cr, 0.03% C, 0.8% Si , 0.3% Mn, 1.3% B, 80.57% Fe), 5 parts of TiC powder, 4 par...

Embodiment 2

[0059] In this embodiment, the base material is H13 die steel, which is used to manufacture forging dies, hot extrusion dies, precision forging dies with large impact loads; die-casting dies of aluminum, copper and their alloys. During use, it needs to withstand high wear-resistant conditions, and it is often local wear. The replacement of the whole mold due to partial damage caused a lot of waste, and at the same time, the shutdown of production greatly reduced the production efficiency of the enterprise.

[0060] In this embodiment, high-speed laser cladding surface strengthening is performed on H13 die steel to form a highly wear-resistant composite gradient coating to improve the performance of H13 die steel and prolong the service life, including the following steps:

[0061] (1) Fe-based powder, TiC powder, Ti powder and C powder are selected for doping in different proportions. The parts by weight of each component in the mixed powder are as follows: 80 parts of Fe-base...

Embodiment 3

[0072] In this embodiment, the material of the base body is GCr15 high-carbon chromium bearing steel, and the GCr15 high-carbon chromium bearing is used for rolling strip steel. The online service period is very short, and the failure of the roll causes a lot of waste. Greatly reduced the production efficiency of the enterprise.

[0073] In this embodiment, high-speed laser cladding surface strengthening is performed on the GCr15 cold roll to form a high wear-resistant composite gradient coating to improve the performance of the GCr15 cold roll and extend the service life, including the following steps:

[0074] (1) Fe-based powder, TiC powder, Ti powder and C powder are selected for doping in different proportions. The parts by weight of each component in the mixed powder are as follows: 70 parts of Fe-based powder (16.5% Cr, 0.12% C, 0.8% Si , 0.9% B, 81.68% Fe), 15 parts of TiC powder, 12 parts of Ti powder and 3 parts of C powder;

[0075] In the above mixed powder, the p...

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Abstract

The invention belongs to the technical field of coating processing, and particularly relates to a method for preparing a dual-scale iron-based composite gradient coating based on a high-speed laser cladding method. According to the method for preparing the dual-scale iron-based composite gradient coating based on the high-speed laser cladding method, the synergistic effect of two thermal fields of powder transportation and deposition in the high-speed laser cladding process is fully utilized, the microstructure of the TiC / Fe-based gradient composite coating can be accurately regulated and controlled, TiC ceramic particle density gradient distribution in the growth direction of the coating can be achieved, the TiC grain size in the surface direction of the coating is a micron-nanoscale coexisting dual-scale composite gradient coating, and the whole coating is high in hardness and excellent in wear resistance.

Description

technical field [0001] The invention belongs to the technical field of coating processing, and in particular relates to a method for preparing a dual-scale iron-based composite gradient coating based on a high-speed laser cladding method. Background technique [0002] In order to adapt to the strong pressure faced by key components of high-end equipment such as oil well drilling, coal hydraulic supports, rolling rollers, large molds, roadheader hobs, high-speed wire finishing mill rollers and turbine blades in metallurgy, energy and petrochemical industries To meet the needs of wear engineering, the composite gradient coating with ceramic particles as the reinforcing phase has always been the focus of research in the industrial field at home and abroad. Among them, gradient materials represented by TiC / Fe-based coatings are of great application value because of their low cost, high hardness, high wear resistance and excellent thermal stability. At present, with the rapid in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00B22F9/04
CPCC23C24/103B22F9/04B22F2009/043
Inventor 刘明霞肖坤宇谢燕翔畅庚榕张秀萍尹志福马飞徐可为
Owner XIAN UNVERSITY OF ARTS & SCI
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