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钼对钨基合金砧块性能的影响

INFLUENCE OF MOLYBDENUM ON PROPERTIES OF TUNGSTEN BASE ALLOYED ANVIL

  • 摘要: 研究了烧结温度及合金成分对合金的室温、高温力学性能以及合金成分对合金导电性能的影响。结果表明,对于含W90%(wt)、Ni:Fe为2:1的合金,在1450℃烧结保温1.5h,合金性能最好,Mo的加入有利于合金的强度、硬度及高温性能的提高,较好地改善了钨基合金砧块的综合性能。Mo有助于W晶粒的细化,它固溶到W相和粘结相中从而达到强化两相的目的。当两相的延性相差不大时,断口大多出现沿W-粘结相的界面断裂,W穿晶断裂数目有所减少。

     

    Abstract: The influences of sintering temperature and the alloy composition on the properties of the alloys both at room and high temperature and of the alloy composition on the electric conductive properties of the alloys have been studied. The results have shown that the alloy containing W 90wt% and with Ni:Fe=2:1 and sintered at 1450℃ for 1.5h has optimum properties. The addition of Mo offers the advantages for increasing the strength, hardness and high temperature properties of the alloys, and improving the combined properties of tungsten base alloyed anvil. Mo is help to make W grains fine. Mo dissolves into W phase and binder phase with the result that strengthens the two phases. In case of no obvious difference of elongation between W phase and binder phase, breaks along interface of W-binder phase will be revealed in most of the fracture surface with the decreasement of the amount of fracture surface through grains.

     

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