Austenite Grain Growth Behavior of X80 Pipeline Steel in Heating Process

钢铁研究学报(英文版), 2010, 17(3): 62-66.

^1, , ^2, , ^3, , ^4, , ^5,

1.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

2.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

3.Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

4.Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

5.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China

基金项目: National Key Technology Research and Development Program of China(2006BAE03A15) 云南省自然科学基金(2006E0017Q)

Austenite Grain Growth Behavior of X80 Pipeline Steel in Heating Process

DUAN Lin-na ^1, , WANG Ji-man ^2, , LIU Qing-you ^3, , SUN Xin-jun ^4, , CAO Jian-chun ^5,

1.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

2.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

3.Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

4.Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China

5.Faculty of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China

Keywords： soaking temperature

Through changing soaking temperature and soaking time, austenite grain growth behavior of X80 pipeline steel under different heating conditions was studied. Relationships of average grain size to soaking temperature and time were obtained respectively. The results show that the prior austenite grains grow with the increase of soaking temperature and time. When soaking temperature is lower than 1 180 ℃, austenite grain size and growth rate are small; when it higher than 1 200 ℃, austenite grains grow rapidly and abnormal grain growth appears. For soaking at 1 180 ℃, austenite grain growth rate is initially high and then decreases when soaking time exceeds 1 h.

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