Iron-based memory alloy laser cladding composite coating powder

A laser cladding and memory alloy technology, which is applied in the field of laser cladding surface modification, can solve the problems of limited application range, low hardness and wear resistance of memory alloy coating, reduce the content of microporous structure and improve the coating quality. Hardness and wear resistance, the effect of improving the corrosion resistance of the coating

Inactive Publication Date: 2018-08-03
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the memory alloy coating still has disadvantages such as low hardness a

Method used

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  • Iron-based memory alloy laser cladding composite coating powder
  • Iron-based memory alloy laser cladding composite coating powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 of the present invention: a kind of iron-based memory alloy laser cladding composite coating powder, is made with the raw material of following weight composition ratio: pure iron powder 46.9kg, manganese powder 28kg, silicon powder 8kg, chromium powder 3.5kg , nickel powder 2.5kg, niobium powder 0.5kg, tungsten carbide powder 10kg, yttrium oxide powder 0.6kg.

[0027] The preparation method of the iron-based memory alloy laser cladding composite coating powder is as follows: use an electronic balance with an accuracy of 0.1mg, weigh and mix various raw material powders according to the above weight component ratio, and put the mixed powder into the stainless steel ball milling tank of the ball mill In the process, stainless steel balls are used as the ball milling medium, and absolute ethanol is used as the milling medium for ball milling, and the powder after ball milling is vacuum-dried to obtain the laser cladding coating powder.

[0028] During the bal...

Embodiment 2

[0030] Embodiment 2 of the present invention: a kind of iron-based memory alloy laser cladding composite coating powder, is made with the raw material of following weight composition ratio: pure iron powder 48.4kg, manganese powder 24.5kg, silicon powder 7kg, chromium powder 5kg , Nickel powder 6kg, niobium powder 0.9kg, tungsten carbide powder 7kg, yttrium oxide powder 1.2kg.

[0031] The preparation method of the iron-based memory alloy laser cladding composite coating powder is as follows: use an electronic balance with an accuracy of 0.1mg, weigh and mix various raw material powders according to the above weight component ratio, and put the mixed powder into the stainless steel ball milling tank of the ball mill In the process, stainless steel balls are used as the ball milling medium, and absolute ethanol is used as the milling medium for ball milling, and the powder after ball milling is vacuum-dried to obtain the laser cladding coating powder.

[0032] During the ball m...

Embodiment 3

[0034] Embodiment 3 of the present invention: a kind of iron-based memory alloy laser cladding composite coating powder, is made with the raw material of following weight composition ratio: pure iron powder 49.2kg, manganese powder 23kg, silicon powder 7.5kg, chromium powder 3kg , Nickel powder 1.6kg, niobium powder 1.3kg, tungsten carbide powder 13kg, yttrium oxide powder 2.4kg.

[0035] The preparation method of the iron-based memory alloy laser cladding composite coating powder is as follows: use an electronic balance with an accuracy of 0.1mg, weigh and mix various raw material powders according to the above weight component ratio, and put the mixed powder into the stainless steel ball milling tank of the ball mill In the process, stainless steel balls are used as the ball milling medium, and absolute ethanol is used as the milling medium for ball milling, and the powder after ball milling is vacuum-dried to obtain the laser cladding coating powder.

[0036] During the bal...

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Abstract

The invention discloses an iron-based memory alloy laser cladding composite coating powder. The powder is prepared by the following raw materials of, by weight, 44-54 parts of pure iron powder, 23-30parts of manganese powder, 7-13 parts of silicon powder, 3-15 parts of chromium powder, 1-13 parts of nickel powder, 0.5-1.5 parts of niobium powder, 4-16 parts of tungsten carbide powder and 0.1-5 parts of yttrium oxide powder. According to the powder and a using method thereof, in the process of preparing the cladding coating powder by using the method, hard particles generates solid solution strengthening, the undecomposed hard particles can generate second phase strengthening, and meanwhile, the hardness and the wear resistance of the coating can be improved; and the grain boundary is purified through rare earth, the structure content of microporous structure is reduced, the coating cracking tendency is reduced, the surface potential of the coating is promoted to be consistent, and therefore the corrosion resistance of the coating can be improved.

Description

technical field [0001] The invention relates to an iron-based memory alloy laser cladding composite coating powder and a preparation and use method thereof, belonging to the technical field of laser cladding surface modification. Background technique [0002] Laser cladding is a surface modification or repair process. By placing powder on the surface of the substrate and heating it with laser radiation, the powder and a small part of the surface of the substrate are melted at the same time. After rapid solidification, a good bond with the substrate is formed. The metallurgically bonded coating has the advantages of simple process, precious metal saving and high economic benefit. However, due to the extremely fast melting and solidification during the laser cladding process, it is easy to cause large residual tissue stress and thermal stress in the coating and substrate, which will lead to microcracks in the coating and affect the fatigue strength and processing of the workpi...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C38/02C22C38/48C22C38/58
Inventor 徐鹏陈健华刘其斌
Owner GUIZHOU UNIV
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