Producing Molybdenum Alloys’ Methods
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- Category: Molybdenum knowledge
- Published on 15 July 2015
- Written by yiping
- Hits: 214
Insoluble metal molybdenum having excellent high temperature strength, creep resistance, low thermal expansion coefficient, good thermal conductivity and corrosion resistance, because it has such good performance so be widely in the electronics industry, the aerospace industry and the energy industry. However, the applications of molybdenum are usually limit by crystallization temperature (1000 ℃), because once the molybdenum crystallized there will be easy to gather harmful impurity element on equiaxed grain boundaries, so that will reduce molybdenum excellent high temperature performance and greatly reduce its normal temperature performance.
In order to make molybdenum can better be applied to increase its temperature range is a necessary step process. And, like other metals, alloyed can significantly improve its high temperature performance, which solution strengthening and the second phase strengthening is the most typical methods. Solution strengthening while maintaining metal in deformable conditions, except for tungsten and rhenium, the total amount of the element added is usually not more than 1%, wherein the zirconium, titanium, and clams are the most effective and commonly used additive elements, representative alloy is Mo-0.5Ti alloys, titanium zirconium molybdenum and titanium-zirconium-carbon alloy.
When the strength of the solution strengthening close to the limit level, in order to further improve its heat intensity, it can use dispersing second phase which is usually using oxide and carbide to strengthen the molybdenum. The typical representative alloy of is molybdenum lanthanum and yttrium alloy.
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