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High-temperature wear-resistant molybdenum alloy coating and preparation method thereof

A high-temperature anti-wear, molybdenum alloy technology, applied in the direction of metal material coating technology, coating, metal processing equipment, etc., can solve the problem of severe wear and tear of high-temperature parts, achieve high-temperature anti-wear performance, reduce production costs, composition simple effect

Active Publication Date: 2022-07-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the serious wear problem of high-temperature parts in my country's aviation, nuclear power and other fields; realize the integrated design of structure and function of molybdenum alloy workpieces in the aerospace field, reduce its economic cost, and thus propose a high-temperature anti-wear molybdenum alloy coating

Method used

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  • High-temperature wear-resistant molybdenum alloy coating and preparation method thereof

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Effect test

Embodiment 1

[0027] A high-temperature wear-resistant molybdenum alloy coating in this embodiment is composed of the following components in parts by weight: Mo79%, Cr14%, and Co7%.

[0028] The preparation steps of the high-temperature wear-resistant molybdenum alloy coating of the present embodiment are as follows:

[0029] According to each component and weight in the coating ratio, use a balance to weigh the corresponding components of spherical molybdenum powder, spherical chromium powder and spherical cobalt powder, place the weighed metal powder in a Y-type mixer, and set the rotating speed. was 26 rpm, and the mixing time was 5 hours to obtain a uniformly mixed powder. The obtained powder was dried in a vacuum drying oven, the temperature was set to 100°C, and the drying time was 15 minutes. The surface of GH4169 nickel alloy cladding was ground and shot blasted, then the cladding surface was cleaned in acetone solution and air-dried. The substrate was preheated to 200°C prior to...

Embodiment 2

[0035] A high-temperature wear-resistant molybdenum alloy coating in this embodiment is composed of the following components in parts by weight: Mo82%, Cr14%, and Co4%.

[0036] The preparation steps of the high-temperature wear-resistant molybdenum alloy coating of the present embodiment are as follows:

[0037] According to each component and weight in the coating ratio, use a balance to weigh the corresponding components of spherical molybdenum powder, spherical chromium powder and spherical cobalt powder, place the weighed metal powder in a Y-type mixer, and set the rotating speed. was 26 rpm, and the mixing time was 5 hours to obtain a uniformly mixed powder. The obtained powder was dried in a vacuum drying oven, the temperature was set to 100°C, and the drying time was 15 minutes. The surface of GH4169 nickel alloy cladding was ground and shot blasted, then the cladding surface was cleaned in acetone solution and air-dried. The substrate was preheated to 200°C prior to...

Embodiment 3

[0043] A high-temperature wear-resistant molybdenum alloy coating in this embodiment is composed of the following components in parts by weight: Mo72%, Cr18%, and Co10%.

[0044] The preparation steps of the high-temperature wear-resistant molybdenum alloy coating of the present embodiment are as follows:

[0045] According to each component and weight in the coating ratio, use a balance to weigh the corresponding amount of spherical molybdenum powder, spherical chromium powder and spherical cobalt powder, place the weighed metal powder in the Y-type mixer, and set the rotation speed. was 26 rpm, and the mixing time was 5 hours to obtain a uniformly mixed powder. The obtained powder was dried in a vacuum drying oven, the temperature was set to 100°C, and the drying time was 15 minutes. The cladding surface of GH4169 nickel alloy was ground and shot blasted, then the cladding surface was cleaned in acetone solution and air-dried. The substrate was preheated to 200°C prior to ...

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Abstract

The invention discloses a high-temperature wear-resistant molybdenum alloy coating and a preparation method thereof, and belongs to the technical field of wear-resistant coatings, and the high-temperature wear-resistant molybdenum alloy coating comprises the following components in parts by weight: 70-86% of Mo, 10-20% of Cr and 4-10% of Co. The invention aims to solve the problem of short service life caused by abrasion of the working surface of the high-temperature bearing shaft sleeve. And preparing the high-temperature wear-resistant molybdenum alloy coating by adopting a synchronous laser cladding technology. The high-temperature wear-resistant coating is compact in internal structure and is tightly combined with the substrate. High-temperature solid lubricants such as molybdate can be generated on the surface in situ in the high-temperature friction process, the excellent high-temperature wear resistance is achieved at the temperature of 600-1000 DEG C, and the hardness is 1.5-2.0 times or above that of a ZTM alloy. The preparation process is simple, the production efficiency is high, the cost is low, and the prepared high-temperature wear-resistant coating can effectively solve the problem of wear of high-temperature parts in the fields of aviation, nuclear power and the like under the condition of not changing the property of a base material of the parts.

Description

technical field [0001] The invention belongs to the technical field of anti-wear coatings, in particular to a high-temperature anti-wear molybdenum alloy coating prepared by using a laser cladding technology and a preparation method thereof. Background technique [0002] Compared with superalloys such as nickel-based, molybdenum and molybdenum alloys have the characteristics of high hardness, high electrical conductivity, low expansion coefficient, and low temperature creep. Research is lacking. The molybdenum content of the microalloyed molybdenum-based alloys currently used is basically above 97%. When the temperature is above 500 °C, the surface of the alloy is obviously oxidized, which reduces the surface strength of the workpiece. When the temperature reaches above 700℃, volatile MoO is formed on the surface 3 , resulting in serious loss of alloy surface quality, resulting in severe wear and reduced service life. In order to strengthen the high-temperature anti-wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C23C24/10B22F1/14
CPCC22C27/04C23C24/106
Inventor 崔功军寇子明高贵军张鹏焦少妮韩文鹏崔昊天
Owner TAIYUAN UNIV OF TECH