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第 20 卷第 10 期钢铁研究学报 Vol. 20 , No. 10
2008 年 10 月 Journal of Iron and Steel Research October 2008
加热温度对管线钢奥氏体晶粒尺寸和铌固溶的影响
张志波1 ,2 , 刘清友2 , 张晓兵3 , 孙新军2
(1. 昆明钢铁股份公司技术中心, 云南昆明 650302 ; 2. 钢铁研究总院结构材料研究所, 北京 100081 ;
3. 江苏沙钢集团有限公司技术中心, 江苏张家港 215625)
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摘要:研究了 X70 管线钢的原始奥氏体晶粒尺寸随加热温度的变化。通过测试淬火后回火硬度的方法分析了
加热过程中铌的固溶。结果表明,随加热温度升高,原始奥氏体晶粒尺寸逐渐增大,并在 1 200 ℃附近出现粗大
晶粒,而钢中铌在 1 150 ℃左右已基本固溶,由此对 X70 管线钢在控轧控冷工艺中加热温度的选择进行了探讨。
关键词:管线钢;加热温度;晶粒尺寸;固溶
中图分类号: T G142 41 文献标识码:A 文章编号:1001 0963 (2008) 10 0036 04
Effect of Heating Temperature on Prior Austenite Size and
Solution of Nb in Pipeline Steel
ZHAN G Zhi bo1 ,2 , L IU Qing you2 , ZHAN G Xiao bing3 , SUN Xin jun2
(1. Technology Center , Kunming Iron and Steel Co Ltd , Kunming , 650302 Yunnan , China ; 2. Institute for
Structural Materials , China Iron and Steel Research Institute Group , Beijing 100081 , China ; 3. Technology
Center , Jiangsu Shagang Group Co Ltd , Zhangjiagang 215625 , Jiangsu , China)
Abstract :Effect of heating temperature on prior austenite size of X70 pipeline steel has been studied by quenching
and tempering experiments , and the solution of Nb has been analyzed. The results showed that the prior austenite
size increased with increasing the heating temperature , and coarse grains were found at around 1 200 ℃, Nb has
dissolved at around 1 150 ℃. In addition , the