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材料研究学报  2014, Vol. 28 Issue (9): 675-681    DOI: 10.11901/1005.3093.2014.024
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30Cr2Ni4MoV钢铸态加热过程中奥氏体晶粒的长大行为*
党淑娥1(),宿展宁1,刘志龙2,何艳1,赵禛1,刘燕1
1. 太原科技大学材料科学与工程学院 太原 030024
2. 山西省产品质量监督检验研究院 太原 030012
Austenite Grain Growth Behavior During Heating Process of As-cast 30Cr2Ni4MoV Steel
Shue DANG1,**(),Zhanning SU1,Zhilong LIU2,Yan HE1,Zhen ZHAO1,Yan LIU1
1. School of Materials Science and Technology, Taiyuan University of Science and Technology, Taiyuan 030024
2. Shanxi Province Institute of Product Quality Supervision and Inspection, Taiyuan 030012
引用本文:

党淑娥,宿展宁,刘志龙,何艳,赵禛,刘燕. 30Cr2Ni4MoV钢铸态加热过程中奥氏体晶粒的长大行为*[J]. 材料研究学报, 2014, 28(9): 675-681.
Shue DANG, Zhanning SU, Zhilong LIU, Yan HE, Zhen ZHAO, Yan LIU. Austenite Grain Growth Behavior During Heating Process of As-cast 30Cr2Ni4MoV Steel[J]. Chinese Journal of Materials Research, 2014, 28(9): 675-681.

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摘要: 

采用KBF1400箱式电阻炉模拟大锻件的实际加热速度, 研究了30Cr2Ni4MoV钢铸态组织在重新加热过程中奥氏体晶粒的长大行为。结果表明: 保温时间一定, 奥氏体的平均晶粒尺寸随着温度的升高呈指数增大; 加热温度一定, 奥氏体的平均晶粒尺寸随着保温时间的延长呈近似抛物线变化; 当温度升高到1100℃时晶粒急剧长大; 得到了描述30Cr2Ni4MoV铸态组织在加热过程中奥氏体的平均晶粒尺寸与保温时间关系的Beck方程, 并建立了在等温条件及非等温条件下的晶粒长大模型。

关键词 金属材料30Cr2Ni4MoV铸态组织重新加热奥氏体晶粒晶粒长大模型    
Abstract

Effect of heating process with a designed heating rate on the austenite grain growth behavior of the as-cast 30Cr2Ni4MoV steel was studied, which aims to simulate the actual heating process during production of large-sized forging. The results show that for a fixed holding time the average size of austenitic grains increases exponentially with the increasing heating temperature; for a fixed heating temperature the average size of austenite grains changes approximate parabolically with the increasing holding time; when the heating temperature is increased to 1100℃, the grains grow up sharply; The Beck equation which describes the dependence of the average size of austenite grains on holding time during heating process of the as-cast 30Cr2Ni4MoV steel was acquired and models of the grain growth under the conditions of isothermal and non-isothermal respectively were also established.

Key wordsmetallic materials    as-cast microstructure of 30Cr2Ni4MoV steel    reheat    austenitic grain    grain growth model
收稿日期: 2014-01-14     
基金资助:* 国家自然科学基金51275330;山西省自然科学基金2012011022-4资助项目。
图1  30Cr2Ni4MoV低压转子钢铸态的显微组织
图2  在不同温度保温1 h试样的显微组织
Heating temperature/℃ 1000 1050 1100 1150 1200 1250
Average austenite grain size/μm 157 182 219 278 347 412
表1  在不同温度保温1 h奥氏体的平均晶粒尺寸
图3  在不同温度保温1 h 奥氏体的平均晶粒尺寸与温度的关系
图4  在不同温度下30Cr2Ni4MoV的显微组织
图5  在不同温度下平均晶粒尺寸与保温时间的关系
图6  在不同温度下ln(d-d0)-lnt关系曲线
图7  误差平方和随n值的变化
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