低氧MHC合金板材的制备及力学性能  

Preparation and mechanical properties of low oxygen MHC alloy sheet

作　　者：张新[1] 梁静[1] 林小辉[1] 高选乔 薛建嵘 杨毅超 ZHANG Xin;LIANG Jing;LIN Xiaohui;GAO Xuanqiao;XUE Jianrong;YANG Yichao(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《粉末冶金工业》2023年第1期56-59,72,共5页Powder Metallurgy Industry

基　　金：陕西省重点研发项目(2020ZDLGY12-08)。

摘　　要：采用粉末冶金方法和热轧工艺制备了低氧MHC合金轧制板材,通过化学分析、金相分析、硬度测试、拉伸力学性能测试研究了低氧MHC合金的显微组织和力学性能。研究表明:通过调节C/Hf原子比、钼粉还原并结合真空烧结等手段,可以有效降低合金中的氧含量。不同温度下退火后样品显微组织分析和力学性能测试结果对比表明,合金板材在1 300℃以下为回复阶段,随着退火温度的增加,1 300℃开始发生再结晶,强度和硬度逐渐下降,塑性提高,在1 600℃时再结晶完成,完全再结晶的低氧MHC合金板材塑性优异。The low oxygen MHC alloy plates were prepared by powder metallurgy and hot rolling method. The microstructure, and mechanical properties of low oxygen MHC alloy rolled plates were studied by chemical analysis,metallographic analysis, hardness test, and tensile mechanical property test. The results show that molybdenum powder reduction, and vacuum sintering, the oxygen content in the alloy can be effectively reduced by adjusting C/Hf atomic ratio. The comparison of microstructure analysis and mechanical property test results of samples annealed at different temperatures, the recovery stage of the alloy is below 1 300 ℃. With the increase of annealing temperature, recrystallization begins at 1 300 ℃, the strength and hardness gradually decrease, and the plasticity increases. The recrystallization is completed at 1 600 ℃. The low oxygen MHC alloy with complete recrystallization has excellent plasticity.

关 键 词：MHC合金 退火处理 轧制 微观组织 再结晶 

分 类 号：TG146.412[一般工业技术—材料科学与工程]