钨合金冲击韧性随温度变化的演变规律及断裂方式研究  

Evolution of Impact Toughness with Different Temperature of Tungsten Alloy

作　　者：王玲 秦颖楠 熊宁[2] 刘桂荣 刘国辉 WANG Ling;QIN Yingnan;XIONG Ning;LIU Guirong;LIU Guohui(ATTL.Advanced Materials Co.,Ltd.,Beijing 100094,China;Advanced Technology&Materials Co.,Ltd.,Beijing 100081,China)

机构地区：[1]安泰天龙钨钼科技有限公司,北京100094 [2]安泰科技股份有限公司,北京100081

出　　处：《中国钨业》2020年第2期51-55,共5页China Tungsten Industry

基　　金：国家重点研发计划专项资助(2017YFB0306000)。

摘　　要：选用粉末冶金法制备93W-5Ni-2Fe合金,通过低温冲击韧性试验测试合金在常温到-60℃之间的冲击韧性,探索材料在低温环境下冲击韧性演变规律,通过扫描电镜观察低温冲击韧性断口,研究材料在低温环境下的断裂机制演变规律。结果表明:93WNiFe合金材料随着材料环境温度的降低,材料的冲击韧性开始基本维持不变,当环境温度低于-30℃之后,材料冲击韧性开始下降,材料的断裂模式逐渐由钨颗粒的穿晶断裂、粘结相撕裂演变为钨-钨界面分离、钨-粘结相的界面分离,材料开始变脆,随着温度进一步的降低材料越来越脆。The 93W-5Ni-2Fe alloy was prepared by powder metallurgy method.The impact toughness of the alloy between normal temperature and-60℃was tested by low-temperature impact toughness test,and the evolution rule of impact toughness at low temperature was explored.the fracture of low-temperature impact toughness was observed by scanning electron microscope,and the evolution rule of fracture mechanism at low temperature was studied.The results show that the impact toughness of 93WNiFe alloy basically keeps unchanged with the decrease of environmental temperature.When the environmental temperature is lower than-30℃,the impact toughness of the material begins to decrease.The fracture mode of the material gradually changes from transgranular fracture of tungsten particles and tearing of bonding phase to tungsten-tungsten interface separation and tungsten-bonding phase interface separation,and the material begins to become brittle.

关 键 词：粉末冶金 钨合金 冲击韧性 低温脆性 

分 类 号：TG146.4[一般工业技术—材料科学与工程]