Transactions of Materials and Heat Treatment

Title：Forging process for N-containing CoCrMo alloy

Authors： Wang Lei Gu Huaizhang Sun Yuelai Deng Jun Ma Buyang

Unit： Kaili University Metalink Special Alloys Corp.

KeyWords： N-containing CoCrMo alloy sectional forging hot wrap and heat preservation mechanical properties nitrides

ClassificationCode：TG319

year,vol(issue):pagenumber：2022,47(5):1-4

Abstract：

Through the method of hot wrap and heat preservation, the blanking and forging test of N-containing CoCrMo alloy electroslag ingot was carried out by rapid forging machine, and the malleability of the alloy under the condition of hot wrap and heat preservation at the initial forging temperature of 1150 ℃ was studied. Then, the forging method of rounding and streching was adopted in the test, and the two ends of N-containing CoCrMo alloy bar blank were forged in sections. The test results show that the N-containing CoCrMo alloy is forged in sections after being hot wrapped at 1150 ℃ for 2.5 h, its yield strength is 623.9 MPa, tensile strength is 933.9 MPa, elongation is 20.3%, and hardness is 27.5 HRC, and all mechanical properties meet the requirements. The nitrides in the alloy is beneficial to improve the properties of material and the grain refinement degree. After forging, the grain size of N-containing CoCrMo alloy after forging is not greater than grade 5.5, and the grain size meets the requirements. Thus, the electroslag ingot of N-containing CoCrMo alloy is successfully forged by the method of hot wrap and sectional forging.

Funds：

凯里学院博士启动项目（BS201814）；省教育厅自然科学研究项目（黔教合KY字［2020］069）；国家自然科学基金资助项目（31760191）

作者简介：王雷(1970-)，男，博士，副教授，E-mail：2015163582@qq.com

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