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《Iron & Steel》 2013-01
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Effect of Heating Temperature After TMCP on Microstructure and Mechanical Properties for X80 Steel Plate With High Nb Content

ZHANG Chuan-guo,ZHENG Lei(Research and Development Center,Baoshan Iron and Steel Co.,Ltd.,Shanghai 201900,China)  
Using trial manufactured X80 pipeline steel plate with high Nb content by TMCP(thermo-mechanical control process),the heat treatment experiments under different temperature were conducted in the laboratory,and the influence rules of heating temperature on microstructure and mechanical properties were studied.The results show that in the heating temperature range from 150 ℃ to 600 ℃,the steel plate microstructure,the tensile and DWTT(drop weight tear test) performance changes not obviously,while ductile-brittle transition temperature slightly rise.After 650 ℃ heat treatment,the coarse microstructure was observed,and the mechanical properties was characterized by DBTT(ductile to brittle transition temperature) rising and DWTT performance dropping.
【CateGory Index】: TG335.1
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