Influence ofNiobium on the Microstructure And Properties of CrMo Cast Steel For Liner Plate
The influence of heat-treatment and Nb on the microstructure and properties of a low alloy CrMo wear-resistant steel lining plate were investigated.Based onan appropriate chemical composition design,excellent combinations of hardness and impact toughness have been achieved for the lining plate application.It is found that,with the double heat treatment of 920℃(8h)+550℃(20h),adding 0.025wt.% Nb improved the tensile strength and hardness of the low alloy CrMo wear-resistant steel by 13% and 16% respectively,while the impact toughness was slightly reduced.With aheat treatment of 880℃(8h)+550℃(20h),adding 0.028wt.% Nbincreased the tensile strength and hardness of the low alloy CrMo wear-resistant steel by 10% and 16% respectively,while the elongation and reduction of area were raised from 2% to 4% and 0.5% to 2% respectively,and the impact toughness was only slightly reduced.Analysis of the microstructure after heat treatment revealedthe inter-lamellar spacing of the pearliticmatrix after the higher temperature processing is smaller than it isafter the lowertemperature processing
CrMo steel Heat Treatment Nb Impact Toughness Ductility Yield Strength
Xiangru Chen Ming You Ai’min Guo Wei Zhang Hiacheng Li Yang Xu Qijie Zhai
State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, China CITIC Heavy Machinery Ltd, Luoyang, China CITIC Metal, Capital Mansion 1903,Beijing,China
国际会议
北京
英文
1-1
2016-05-18（万方平台首次上网日期，不代表论文的发表时间）