离心压缩机转子用A470 Class 7钢低温性能的研究  

Study on Low Temperature Properties of A470 Class 7 Steel Used on Rotor of Centrifugal Compressor

作　　者：翁吉铭 陈炜[1] 邵帅[1] 包翠敏[1] 耿延朝 聂娜娜 WENG Ji-ming;CHEN Wei;SHAO Shuai;BAO Cui-min;GENG Yan-zhao;NIE Na-na(Shenyang Blower Group Co.,Ltd.,Shenyang Liaoning 110869,China)

机构地区：[1]沈阳鼓风机集团股份有限公司,辽宁沈阳110869

出　　处：《热处理技术与装备》2020年第1期17-20,共4页Heat Treatment Technology and Equipment

摘　　要：本文对常温以及低温下A470 Class 7钢的力学性能以及金相组织进行了研究。结果表明:淬火+回火处理后,A470 Class 7钢的金相组织主要为回火索氏体;随着冲击试验温度的降低,A470 Class 7钢的剪切断面的面积比例在逐渐减少,解理断面的面积所占的比例在逐渐增大,在-196℃时拉伸断裂后为明显的脆性断口;通过测试证明A470 Class 7钢经过580~610℃稳定处理后的力学性能和金相组织没有明显的变化,可以满足使用要求。The mechanical properties and microstructure of A470 Class 7 steel at room temperature and low temperature have been researched in this paper.The results show that the microstructure of A470 Class 7 steel is mainly tempered sorbite after quenching and tempering.With the decrease of the impact test temperature,the area ratio of shear section of A470 Class 7 steel decrease gradually,conversely the proportion of cleavage section area is gradually increasing,and it is obvious brittle fracture after tensile fracture at-196℃.The test shows that the mechanical properties and microstructure of A470 Class 7 steel have not changed significantly after stable treatment at 580~610℃,which can meet the service requirements.

关 键 词：A470 CLASS 7钢 冲击功 剪切断面 力学性能 

分 类 号：TG156[金属学及工艺—热处理] TG113.35[金属学及工艺—金属学]