C含量对PM-MHC合金棒组织及力学性能影响研究  

EFFECT OF CARBON CONTENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PM-MHC ALLOY RODS

作　　者：赵虎[1] 杨秦莉[1] 付静波[1] 武洲[1] 何凯[1] 安耿[1] 周新文[1] 史振琦[1] ZHAO Hu;YANG Qin-Li;FU Jing-Bo;WU Zhou;HE Kai;AN Geng;ZHOU Xin-Wen;SHI Zhen-qi(Jinduicheng Molybdenum Co.,Ltd.,Xi’an 710077,Shaanxi,China)

机构地区：[1]金堆城钼业股份有限公司,陕西西安710077

出　　处：《中国钼业》2020年第1期45-48,共4页China Molybdenum Industry

基　　金：国家重点研发计划重点专项(No.2017YFB0306003)。

摘　　要：研究了C含量对粉末冶金法制备的PM-MHC合金棒组织和力学性能的影响。结论指出:不同C/Hf比对MHC合金烧结棒坯C、O有影响,C烧损较大。C含量较高时烧结坯微观晶粒细化,进而在高温锻造后纤维组织更为细致。PM-MHC合金棒经88.6%锻造比变形,经1200℃×1 h热处理后室温强度Rp 0.2850 MPa。提高C/Hf原子比,PM-MHC合金棒材强度会相应提高但延伸率下降。The effect of carbon content on the microstructure and mechanical properties of PM-MHC alloy rods produced by powder metallurgy process was studied in this paper.The results show that different C/Hf ratios has influence on the carbon and oxygen contents of sintered MHC alloy rod billets,and C is burned out during sintering.When the content of carbon is higher,the grain size of sintered billet is refined,and the fiber structure is more detailed after forging at high temperature.The yield strength(Rp 0.2)of PM-MHC alloy rods is not less than 850 MPa at room temperature after deformed by 88.6% forging ratio and heat treatment at 1200℃×1 h.With the increase of C/Hf atomic ratio,the strength of PM-MHC alloy rods will increase correspondingly but the elongation will decrease.

关 键 词：C含量 MHC合金 组织 性能 

分 类 号：TG146.412[一般工业技术—材料科学与工程]