K60、X80管线钢连铸坯的高温塑性
High Temperature Plasticity of Continuous Casting Slabs for K60 and X80 Pipeline Steels
摘 要
采用Gleeble 1500型热模拟试验机研究了K60、X80管线钢连铸坯在1 350～650℃、1.0×10-3 s-1应变速率下拉伸时的高温塑性.结果表明:两种钢坯的第Ⅰ脆性区间为熔点～1 300℃;在高温区1 300～900℃时两种钢的塑性均很好,没有产生明显脆化;第Ⅲ脆性区间为900～700℃,该区域可分为γ单相区和γ+α两相区两部分.
高温塑性
γ→α相变
动态再结晶
pipeline steel
high temperature plasticity
γ→α transformation
dynamic recrystallization
Abstract
The high temperature plasticities of continuous casting slabs for K60 and X80 pipeline steels were studied by Gleeble 1500 thermomechanical simulator in the temperature range 1 350℃ to 650℃ at a low strain rate of 1.0×10-3 s-1.The results show that the embrittlement region Ⅰ of the two steel slabs was between melting point and 1 300℃.In the high temperature range(between 1 300℃ and 900℃),the plasticities of both the steels were excellent and there was no evident embrittlement.The embrittlement temperature region III was between 900℃ and 700℃,Which was consist of single γ phase region and γ+α phase region.
中图分类号 TG124.14
所属栏目 材料性能及其应用
基金项目
收稿日期 2009/4/16
修改稿日期 2009/10/23
网络出版日期
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备注张双平(1983-),男,江西上饶人,硕士研究生.
引用该论文: ZHANG Shuang-ping,LIU Jing,ZHANG Yan,ZHANG Bei,HAN Jing-tao,PENG Jie. High Temperature Plasticity of Continuous Casting Slabs for K60 and X80 Pipeline Steels[J]. Materials for mechancial engineering, 2010, 34(7): 49～51
张双平,刘靖,张艳,张备,韩静涛,彭杰. K60、X80管线钢连铸坯的高温塑性[J]. 机械工程材料, 2010, 34(7): 49～51
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【7】王新华,昌波,李景捷,等.700~1000℃间含Nb钢铸坯的延塑性降低与Nb(C,N)析出[J].金属学报,1997,33(5):485-491.
【8】王新华,刘新宇,吕文景,等.含Nb、V、Ti钢连铸坯中碳、氮化物的析出及钢的高温塑性[J].钢铁研究学报,1998,10(6):32-36.
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