铸造技术2018，Vol.39Issue(1)：186-188,201,4.DOI:10.16410/j.issn1000-8365.2018.01.050
不同淬火回火处理工艺对Q345钢冲击韧度的影响
Effect of Different Quenching and Tempering Treatments on Impact Toughness of Q345 Steel
王会芳1
作者信息
- 1. 扬州工业职业技术学院建筑工程学院,江苏扬州225127
- 折叠
摘要
Abstract
With microstructure observation and hardness measurement,relationship between microstructure and properties of Q345 steel and heat treatment was studied.The results show that the microstructure of Q345 steel exhibits martensite and banded ferrite after quenching-intercritical quenching-tempering heat treatment.And the microstructure of Q345 steel exhibits martensite and equiaxed ferrite after thermo mechanical control process-intercritical quenching-tempering heat treatment.There are two models of the crack propagation after quenching-intercritical quenching-tempering heat treatment.One model is along the long axis direction of ferrite and the interface of the two phases,and the other is across the banded ferrite.After thermo mechanical control process-intercritical quenching-tempering heat treatment,the crack propagation is across ferrite and martensite by transgranular mode.The impact property at low temperature is improved after quenching-intercritical quenching-tempering heat treatment.关键词
Q345钢/热处理/冲击韧度/组织/裂纹Key words
Q345 steel/heat treatment/impact toughness/microstructure/crack propagation分类
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王会芳..不同淬火回火处理工艺对Q345钢冲击韧度的影响[J].铸造技术,2018,39(1):186-188,201,4.
