HTP X80管线钢的晶粒细化与组织控制

钢铁, 2009, 44(3): 62-0.

HTP X80管线钢的晶粒细化与组织控制

缪成亮 , 尚成嘉 , 曹建平 , 王学敏 , 贺信莱

北京科技大学材料科学与工程学院，北京 100083

Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China

关键词： HTP;X80管线钢;再结晶;等温转变;连续冷却转变

Grain Refinement and Microstructure Control of HTP X80 Pipeline Steel

MIAO Chengliang , SHANG Chengjia , CAO Jianping , WANG Xuemin , HE Xinlai

Keywords： HTP;X80 pipeline steel;recrystallization;isothermal transformation;continuous cooling transformation

通过热模拟实验研究了HTP X80管线钢的晶粒细化与组织控制的工艺要点，确定了奥氏体再结晶温度区和非再结晶温度区，揭示了高Nb含量的HTP钢在连续冷却过程中的相变特点。所得到的技术要点对细化奥氏体晶粒，避免混晶的出现，以及通过控制冷却得到理想的相变产物具有指导性。

The technologyical points of grain refinement and microstructure control of HTP X80 were investigated by means of thermal simulation trial. Austenite recrystallization temperature zone and nonrecrystallization temperature zone were determined. The characteristics of phase transformation of high Nb HTP steel in continuous cooling process were disclosed. The research results have instructional significance to refine austenite grain, prohibit duplex grain structure, obtain ideal microstructure by cooling control.

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