Transactions of Materials and Heat Treatment

Title：Influence of forging on microstructures and properties of steel 30CrNi2MoV under air cooling and tempering

Authors： Zhang Xiaoyu Xu Xiaojing Chen Ruifang Du Donghui Tong Hao Liu Zhigang Huang Jindong

Unit： Jiangsu University

KeyWords： steel 30CrNi2MoV forging process heavy forgings tempering and air cooling microstructure mechanical property

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2018,43(1):25-29

Abstract：

The influences of forging method on the microstructures and properties of steel 30CrNi2MoV under the conditions of tempering and air cooling were studied by tensile tes, impact test, metallographic corrosion test and hardness test. The results show that the tensile strength of steel 30CrNi2MoV is increased from 1173.007 MPa to 1215.5 MPa and 1260.3 MPa respectively by the forging process of two-time upsetting and stretching and then the forging process of one-time upsetting or one-time upsetting and one-time stretching, the impact toughness is significantly improved from 26.67 J to 87.67 J and 56 J respectively, and the hardness is strengthened to a certain extent which is increased from 393 HB to 405.13 HB and 377.9 HB respectively. The strength of forging comes from refinement and uniformity of grain inside the material, and the strengthening effect of latter forging processes is obviously higher than that of the forging process of two-time upsetting and stretching.

Funds：

江苏省产学研前瞻联合研究项目（BY2014123-04）

作者简介：张晓宇(1991-)，男，硕士研究生，E-mail: Mrxiaoyu910928@163.com；通讯作者：许晓静（1967-），男，博士，教授，E-mail:xjxu67@126.com

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