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Preparation method of molybdenum-based alloy coating

A molybdenum-based alloy and coating technology, which is applied in the field of preparation of molybdenum-based alloy coatings, can solve problems such as inconsistent thermal expansion coefficients and high bonding strength, and achieve the effects of solving inconsistent thermal expansion coefficients, high bonding strength, and reducing sintering temperature

Active Publication Date: 2019-09-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the existing SPS technology for coating preparation, it is difficult to prepare a high temperature resistant coating on a low melting point substrate, and the thermal expansion coefficients between the coating and the substrate are inconsistent, resulting in low bonding strength or even difficulty in bonding. The invention provides A method for preparing a molybdenum-based alloy coating, which can effectively solve the problem of inconsistent thermal expansion coefficients between the coating and the substrate when preparing a high-temperature coating on a low-melting point substrate, and has high bonding strength

Method used

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  • Preparation method of molybdenum-based alloy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The chemical composition and mass percentage of the molybdenum-based alloy coating in this embodiment are: Cu: 5%, Zr: 0.15%, Ti: 0.6%, C: 0.06%, Mo: 94.19%.

[0069] 1. Pretreatment

[0070] Mo powder, Cu powder, TiH 2 , ZrH 2 , Graphite powder is batched according to the ratio of mass ratio 94.19: 5: 0.6: 0.15: 0.06. Mix in a planetary ball mill for 10 hours at a ball-to-material ratio of 10:1, and add a little absolute ethanol during mixing;

[0071] Take the 304 stainless steel to be sintered, pre-grind, polish and ultrasonically clean the 304 stainless steel surface to be bonded, and vacuum dry;

[0072] Select nickel foil with a thickness of 100um and a purity of not less than 99.0% as the intermediate transition layer, and polish and polish both sides of the nickel foil;

[0073] 2. Modeling

[0074] Take the graphite mold, put the processed 304 stainless steel substrate, nickel foil, and Mo-Ti-Zr-Cu-C alloy powder into the graphite female mold from bottom t...

Embodiment 2

[0085] The chemical composition and mass percentage of the molybdenum-based alloy coating in this embodiment are: Cu: 10%, Zr: 0.08%, Ti: 0.5%, C: 0.02%, Mo: 89.4%.

[0086] 1. Pretreatment

[0087] Mo powder, Cu powder, TiH 2 , ZrH 2 , Graphite powder is batched according to the ratio of mass ratio 89.4: 10: 0.5: 0.08: 0.02. Mix in a planetary ball mill for 10 hours at a ball-to-material ratio of 10:1, and add a little absolute ethanol when mixing.

[0088] Take the 304 stainless steel to be sintered, pre-grind, polish and ultrasonically clean the 304 stainless steel surface to be bonded, and vacuum dry;

[0089] Select nickel foil with a thickness of 100um and a purity of not less than 99.0% as the intermediate transition layer, and polish and polish both sides of the nickel foil;

[0090] 2. Modeling

[0091] Take the graphite mold, put the processed 304 stainless steel substrate, nickel foil, and Mo-Ti-Zr-Cu-C alloy powder into the graphite female mold from bottom to ...

Embodiment 3

[0102] The chemical composition and mass percentage of the molybdenum-based alloy coating in this embodiment are: Cu: 30%, Zr: 0.12%, Ti: 0.4%, C: 0.04%, Mo: 69.44%.

[0103] 1. Pretreatment

[0104] Mo powder, Cu powder, TiH 2 , ZrH 2 , Graphite powder is batched according to the ratio of mass ratio 69.44: 30: 0.4: 0.12: 0.04. Mix in a planetary ball mill for 10 hours at a ball-to-material ratio of 10:1, and add a little absolute ethanol when mixing.

[0105] Take the 304 stainless steel to be sintered, pre-grind, polish and ultrasonically clean the 304 stainless steel surface to be bonded, and vacuum dry;

[0106] Select nickel foil with a thickness of 100um and a purity of not less than 99.0% as the intermediate transition layer, and polish and polish both sides of the nickel foil;

[0107] 2. Modeling

[0108] Take the graphite mold, put the processed 304 stainless steel substrate, nickel foil, and Mo-Ti-Zr-Cu-C alloy powder into the graphite female mold from bottom t...

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Abstract

The invention discloses a preparation method of a molybdenum-based alloy coating, and belongs to the field of preparation of alloy coatings. The method comprises the following steps of, 1, an iron base and a metal foil are taken, and pretreatment is carried out on the iron base and the metal so as to making the iron base and the metal foil reach the use requirements; 2, a graphite die is taken, and the graphite die comprises an upper pressure head, a lower pressure head and a hollow female die; and the iron base, the metal foil and molybdenum-containing metal powder are put into the female die successively, and the graphite die is pressed by the upper pressure head and the lower pressure head; and 3, the graphite die is placed into a hearth of a discharge plasma sintering system, the current is introduced, and sintering and bonding are carried out on the iron base and the molybdenum-containing metal powder. According to the preparation method, the problem that the thermal expansion coefficient between the coating and a base body is not consistent when a high-temperature coating is prepared on a low-melting-point base body is effectively solved, and the bonding strength is relatively high.

Description

technical field [0001] The invention belongs to the field of alloy coating preparation, and more specifically relates to a preparation method of a molybdenum-based alloy coating. Background technique [0002] Molybdenum is widely used in many fields such as metallurgy, machinery, petroleum, chemical industry, electronics and nuclear industry because of its high melting point, good high temperature performance, excellent electrical and thermal conductivity, thermal shock resistance, wear resistance and corrosion resistance. However, due to its low-temperature brittleness and poor high-temperature oxidation resistance, its use as a structural material is limited. In order to solve this problem, people usually alloy it to improve its performance. [0003] Molybdenum alloy is a non-ferrous alloy composed of molybdenum as the matrix and adding other elements. It has excellent high-temperature mechanical properties, low thermal expansion coefficient and high thermal conductivity....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04B22F3/02B22F3/105B22F7/04
CPCB22F3/02B22F3/105B22F7/04B22F2007/042B22F2999/00C22C27/04B22F2201/20
Inventor 黄贞益马玉康侯清宇唐木生马啸宇光剑锋伍厚玲郭爱民吴金泉
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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