Study on Tensile Properties of QLT-Treated 9%Ni Steel at Low Temperature
SU Hang1,ZHAO Xi-qing2,PAN Tao1,GAO Jian-zhong2,WANG Qing-feng2
1. Division of Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China 2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei， China
Abstract：Tensile test at room temperature and low temperatures for the QLT-treated 9%Ni steel were carried out. The amount and lattice parameters of reversed austenite and the microstructure in the vicinity of tensile fracture surfaces were analyzed using XRD and TEM. The effects of reversed austenite on tensile deformation behavior of QLT-treated 9%Ni steel were investigated. Experimental results show that the uniform elongation increases and the yield ratio decreases when the tensile temperature decreases from 20 to -196℃ in the QLT-treated 9%Ni steel. This indicate that the phase transformation of reversed austenite during the low-temperature tension improve the cryogenic plasticity of QLT-treated 9%Ni steel.
收稿日期: 2011-12-30
出版日期: 2012-07-30
引用本文:
苏航，赵希庆，潘涛，高建忠，王青峰. QLT处理9%Ni钢低温拉伸性能的研究[J]. 钢铁, 2012, 47(7): 55-58.
SU Hang1,ZHAO Xi-qing2,PAN Tao1,GAO Jian-zhong2,WANG Qing-feng2. Study on Tensile Properties of QLT-Treated 9%Ni Steel at Low Temperature. Iron and Steel, 2012, 47(7): 55-58.
2012, Vol. 47 
