加热温度对管线钢奥氏体晶粒尺寸和铌固溶的影响

钢铁研究学报, 2008, 20(10): 36-0.

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 , 刘清友 , 张晓兵 , 孙新军

1.1. 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. 3. 江苏沙钢集团有限公司技术中心, 江苏张家港 215625

1.1. Technology Center, Kunming Iron and Steel Co Ltd, Kunming, 650302 Yunnan, China

2.2. Institute for Structural Materials, China Iron and Steel Research Institute Group, Beijing 100081, China

3.3. Technology Center, Jiangsu Shagang Group Co Ltd, Zhangjiagang 215625, Jiangsu, China

关键词：管线钢;加热温度;晶粒尺寸;固溶

Effect of Heating Temperature on Prior Austenite Size and Solution of Nb in Pipeline Steel

ZHANG Zhibo , LIU Qingyou , ZHANG Xiaobing , SUN Xinjun

Keywords： pipeline steel;heating temperature;grain size;solution

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。

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 option of heating temperature for controlled rolling and cooling was discussed.

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