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Tough high-temperature-oxidation-resistant molybdenum alloy and preparation method thereof

A technology of high temperature resistance and molybdenum oxide, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems that limit the development and application of molybdenum alloys, and achieve the effect of good room temperature fracture toughness

Active Publication Date: 2020-04-21
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different composition systems, forming processes and doping elements have a key influence on the metallographic structure of the alloy. The balance of good fracture toughness and high temperature oxidation resistance is a key problem, which limits the development and application of molybdenum alloys.

Method used

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  • Tough high-temperature-oxidation-resistant molybdenum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 2520g of Mo powder, 75.6g of Si powder, 25.2g of B powder, and 20.16g of Zr powder and put it into a mixer for mixing for 15 hours, then put the mixture into a planetary ball mill (QM-3SP4) for ball milling for 20 hours. 5:1, speed 300r / min, the ball mill rotates once an hour to make it evenly milled and obtain pre-alloyed powder. Among them, the median particle size of the selected molybdenum powder particles is 1-3 μm, and the purity is not lower than 99.95%; the median particle size of the silicon powder particles is 2-4 μm, and the purity is not lower than 99.90%; The median particle size is 2-4 μm, and the purity is not lower than 99.50%; the median particle size of zirconium powder particles is 20-40 μm, and the purity is not lower than 99.90%.

[0026] Put the pre-alloyed powder into the graphite mold, and use graphite paper in the graphite mold to isolate the powder from the mold; after wrapping, put it into the cold isostatic pressing equipment, set the p...

Embodiment 2

[0030] Weigh 2548g of Mo powder, 39.6g of Si powder, 26.4g of B powder, and 25.8g of Zr powder and put it into a mixer for mixing for 20 hours, then put the mixture into a planetary ball mill (QM-3SP4) for ball milling for 20 hours. 5:1, speed 300r / min, the ball mill rotates once an hour to make it evenly milled and obtain pre-alloyed powder. Among them, the median particle size of the selected molybdenum powder particles is 1-3 μm, and the purity is not lower than 99.95%; the median particle size of the silicon powder particles is 2-4 μm, and the purity is not lower than 99.90%; The median particle size is 2-4 μm, and the purity is not lower than 99.50%; the median particle size of zirconium powder particles is 20-40 μm, and the purity is not lower than 99.90%.

[0031] Put the pre-alloyed powder into the graphite mold, and use graphite paper in the graphite mold to isolate the powder from the mold; after wrapping, put it into the cold isostatic pressing equipment, set the pr...

Embodiment 3

[0035] Weigh 2551g of Mo powder, 44.9g of Si powder, 21.6g of B powder, and 22.3g of Zr powder and put it into a mixer for mixing for 15 hours, then put the mixture into a planetary ball mill (QM-3SP4) for ball milling for 20 hours. 5:1, speed 300r / min, the ball mill rotates once an hour to make it evenly milled and obtain pre-alloyed powder. Among them, the median particle size of the selected molybdenum powder particles is 1-3 μm, and the purity is not lower than 99.95%; the median particle size of the silicon powder particles is 2-4 μm, and the purity is not lower than 99.90%; The median particle size is 2-4 μm, and the purity is not lower than 99.50%; the median particle size of zirconium powder particles is 20-40 μm, and the purity is not lower than 99.90%.

[0036] Put the pre-alloyed powder into the graphite mold, and use graphite paper in the graphite mold to isolate the powder from the mold; after wrapping, put it into the cold isostatic pressing equipment, set the pr...

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Abstract

The invention provides a tough high-temperature-oxidation-resistant molybdenum alloy and a preparation method thereof. The molybdenum alloy is composed of molybdenum, silicon, boron and zirconium, andthe molybdenum alloy comprises, by mass percentage, 2.2%-4% of silicon, 0.8%-1% of boron, 0.8%-1% of zirconium and the balance molybdenum. According to the preparation method, a solid-solid mixing mode is adopted for material mixing, pre-alloyed powder with uniform particles is prepared through mechanical ball milling or high-energy ball milling, the alloyed ball-milled powder is sintered to obtain a molybdenum alloy material, and then embedding siliconizing treatment is carried out to obtain the tough and antioxidant molybdenum alloy. The molybdenum alloy prepared through the method has goodcompactness, high toughness and high-temperature oxidation resistance, and thus the molybdenum alloy has wide application prospects and popularization value.

Description

technical field [0001] The invention relates to the field of powder metallurgy, and relates to a strong and tough high-temperature oxidation-resistant molybdenum alloy and a preparation method thereof. Background technique [0002] Molybdenum-silicon-boron alloy is a refractory material with high melting point, high temperature strength and high hardness, and has very important application prospects. However, different composition systems, forming processes and doping elements have a key influence on the metallographic structure of the alloy. The balance of good fracture toughness and high temperature oxidation resistance is a key problem, which limits the development and application of molybdenum alloys. . Therefore, the research and development of molybdenum alloys with excellent properties and the improvement of forming process and product quality are important directions for researchers. Contents of the invention [0003] In order to solve the problems existing in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/04C23C10/44B22F9/04B22F3/10
CPCB22F3/1007B22F9/04B22F2009/041B22F2009/043B22F2998/10C22C1/045C22C27/04C23C10/44B22F3/04
Inventor 汪诚王雷郭振平李秋良安志斌李彬
Owner AIR FORCE UNIV PLA
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