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《China Mechanical Engineering》 2015-06
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Manufacture and Properties on Prototype for Multi-metal Hot Forging Die Based on Cobalt Alloy Coating

Wang Huajun;Li Xiangchao;Zhao Kun;Xie Bing;Wuhan University of Technology;Wuhan Railway Bureau;  
Multilayer metal hot forging die is an effective method to improve the service life of the die based on the idea of FGM. The samples of multi metal hot forging die were prepared through shielded metal arc welding herein. After post weld heat treatment,the microstructure analysis,microhardness test,wear test and impact toughness test were done. The test results show that,interface of cobalt alloy surfacing layer and W6Mo5Cr4V2 surfacing layer bonds in good condition. The microhardness of cross section is in gradient distribution and the surface hardness of cobalt alloy reaches 492 HV. Wear resistance is 2. 5 times that of H13 and the impact toughness is in a rational range.
【Fund】: 国家自然科学基金资助项目(51475346);; 湖北省自然科学基金资助项目(2012FFB05108)
【CateGory Index】: TG315.2
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