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Method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC

A technology of al4sic4-hfc and molybdenum alloy, which is applied in the field of preparing low-oxygen metal alloys, can solve problems such as poor compatibility, shedding, coating cracking, etc., and achieve excellent hardness and wear resistance, excellent oxidation resistance, and high bonding strength Effect

Active Publication Date: 2014-08-13
XIAN RUIKE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using electroplating, spraying, cladding, vapor deposition and other coating processes, the bonding strength between the coating and the substrate is low, and the compatibility is poor, causing the coating to crack or even fall off during use, thus affecting the oxidation resistance of the coating to the substrate.

Method used

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  • Method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC
  • Method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Will Al 4 SiC 4 Powder and HfC powder are Al by mass fraction percentage 4 SiC 4 : HfC=55% : 45% mixed evenly to get Al 4 SiC 4 -HfC powder, Al 4 SiC 4 -HfC powder and composite binder are mixed at a volume ratio of 1:3, stirred evenly, and prepared into a viscous coating filling slurry.

[0027] First, the coating filling slurry is evenly spread to the bottom of the cavity of the pressing mold, and the coating thickness of the coating filling slurry on the bottom of the cavity of the pressing mold is 1 mm. Then adopt lightweight filling block to be placed on the top of the coating, the filling block is coaxial with the cavity of the pressing mold, so that the side of the filling block and the cavity inner wall of the pressing mold enclose a semi-closed trough with a side length of 1 mm, and then Fill the trough with coating filling slurry by injection;

[0028] After the coating and filling slurry in the trough is solidified, remove the lightweight filling bloc...

Embodiment 2

[0032] Will Al 4 SiC 4 Powder and HfC powder are Al by mass fraction percentage 4 SiC 4 : HfC=60% : 40% mixed evenly to get Al 4SiC 4 -HfC powder, Al 4 SiC 4 -HfC powder and composite binder are mixed at a volume ratio of 1:3, stirred evenly, and prepared into a viscous coating filling slurry.

[0033] First, the coating filling slurry is evenly spread to the bottom of the cavity of the pressing mold, and the coating thickness of the coating filling slurry on the bottom of the cavity of the pressing mold is 2mm. Then adopt lightweight filling block to be placed on the coating top, the filling block is coaxial with the cavity of the pressing mold, so that the side of the filling block and the cavity inner wall of the pressing mold enclose a semi-closed trough with a side length of 2mm, and then Fill the trough with coating filling slurry by injection;

[0034] After the coating and filling slurry in the trough is solidified, remove the lightweight filling block; charge ...

Embodiment 3

[0037] Will Al 4 SiC 4 Powder and HfC powder are Al by mass fraction percentage 4 SiC 4 : HfC=70%: 30% mixed evenly to get Al 4 SiC 4 -HfC powder, Al 4 SiC 4 -HfC powder and composite binder are mixed at a volume ratio of 1:2, stirred evenly, and prepared into a viscous coating filling slurry.

[0038] First, the coating filling slurry is evenly spread to the bottom of the cavity of the pressing mold, and the coating thickness of the coating filling slurry on the bottom of the cavity of the pressing mold is 2mm. Then adopt lightweight filling block to be placed on the coating top, the filling block is coaxial with the cavity of the pressing mold, so that the side of the filling block and the cavity inner wall of the pressing mold enclose a semi-closed trough with a side length of 2mm, and then Fill the trough with coating filling slurry by injection.

[0039] After the coating and filling slurry in the trough is solidified, remove the lightweight filling block; charge ...

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Abstract

The invention discloses a method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC. The method for preparing low-oxygen molybdenum and molybdenum alloy clad with Al4SiC4-HfC adopts an injection filling method, and specifically comprises that Al4SiC4-HfC powder and a compound binding agent are mixed in a volume ratio of 1:(3-2) into slurry, and the slurry is injected and filled at the periphery of molybdenum and molybdenum alloy powder in a pressing mould with the filling thickness of 1-3mm; pressing at a pressure of 50-100KN is carried out, so that a molybdenum and molybdenum alloy pressed blank clad with Al4SiC4-HfC is formed; then the conventional sintering and annealing are carried out on molybdenum and molybdenum alloy, so that a Al4SiC4-HfC clad low-oxygen molybdenum and molybdenum alloy material is prepared. The prepared Al4SiC4-HfC clad low-oxygen molybdenum and molybdenum alloy material has the advantages of excellent oxidation resistance, long service life, high bonding strength between a cladding layer and a matrix, good compatibility, low cost and simple technology.

Description

technical field [0001] The invention relates to a method for preparing a low-oxygen metal alloy, in particular to an Al 4 SiC 4 A method for preparing low-oxygen molybdenum and molybdenum alloys by coating with HfC. Background technique [0002] Molybdenum has the characteristics of high strength, high hardness, wear resistance, and good thermal and electrical conductivity. In addition to the characteristics of molybdenum, molybdenum alloys also have the advantages of small expansion coefficient and good corrosion resistance. They are often used as high-temperature structural materials and functional Materials, thus widely used in metallurgy, machinery, petroleum, chemical industry, national defense, aerospace, electronics, nuclear industry and many other fields. However, due to the oxidation of molybdenum and molybdenum alloys when the temperature reaches 400°C, MoO 2 ;Rapidly oxidized to MoO at 500℃~600℃ 3 Volatile. Therefore, the oxidation behavior of molybdenum affe...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10
Inventor 胡平王快社于志涛杨帆谭江飞何欢承康轩齐
Owner XIAN RUIKE NEW MATERIAL CO LTD
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