Transactions of Materials and Heat Treatment

Title：Influence of forging temperature on the microstructure and properties of Cr12Mo1V1

Authors： Sun Maoyin Zhao Yisheng Jiang Keda Deng Yunlai

Unit： Central South University

KeyWords： forging temperature Cr12Mo1V1 M7C3 carbide cold-work die steel impact toughness

ClassificationCode：TG319

year,vol(issue):pagenumber：2017,42(3):130-136

Abstract：

For Cr12Mo1V1 used as pipe cutting blade, the influences of different forging processes on hardness and impact toughness were analyzed, and their microstructures under different forging process tests were observed by OM，XRD and SEM. Experimental results show that the peak hardness of air cooling after forging is shifted to the right compared with the normal quenching and obtains 887 HV at 1100 ℃. With the increase of forging temperature, the impact toughness of tempering at 650 ℃ decreases. So the amount of martensite reduces, and the amount of retained austenite increases. The carbide of air cooling after forging is mainly M7C3. Comprehensive analysis shows that the blade can get better microstructure and properties when the forging temperature is from 1100 ℃ to 1160 ℃.

Funds：

国家自然科学基金资助项目（51375503）；国家重点研发计划（2016YFB0300901）；广西八桂学者项目（2013A017）

孙茂银 (1991-)，男，硕士研究生邓运来(1969-)，男，博士，教授

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