Development Practice of Large Scale Bainite Non-quenched and Tempered Steel XGMnVS
Author of the article:XIAN Fenqiang , WANG Zhilin , QIAN Cairang , WANG Leiying , YANG Guo ,MA Juan, LIU Peiqiang
Author's Workplace： Xining Special Steel Co., Ltd., ; Qinghai Xigang Special Steel Technology Development Co., Ltd.,
Key Words：XGMnVS steel; large scale; bainite; mechanical properties
Abstract：
φ175 mm steel XGMnVS (mass fraction,% ： 0.12~0.14 C ， 0.80~0.90 Si ， 2.65~2.75 Mn ， 0.010~0.020 S 0.08~0.15 V ， 0.64~0.72 Cr ， 0.19~0.25 Ni ， 0.015~0.025 Ti ， 0.010~0.030 Nb) was designed. The structure of the steel is a mixture of slab bainite and granular bainite with good mechanical properties, tensile strength of 1 100~1 200 MPa, yield strength of 780~880 MPa, elongation ≥15% , section shrinkage ≥35% , impact work ≥35 J, and Brinell hardness of 300~330 HB. Large scale bainitic non-quenched and tempered steel XGMnVS can be widely used in the manufacture of hydraulic poles of plastic machines and front axles of automobiles.
