摘要
利用SEM和室温拉伸试验,研究了两相区温度对IQ&P处理0.1C-7Mn钢组织和力学性能的影响。结果表明,随两相区温度升高,试样的力学性能先升高后降低,两相区温度为660℃时,试样的力学性能最优,得到最高强塑积21.2 GPa·%。在较高和较低的两相区温度下进行IQ&P处理时,残留奥氏体由于稳定性过高均不会发生马氏体相变。除此之外,两相区温度为660℃时,试样的拉伸曲线存在明显的屈服平台,温度升高后,屈服平台消失。
Effect of intercritical temperature on the microstructure and mechanical properties of IQ&P treated 0.1C-7Mn steel was investigated by means of scanning electron microscope and room temperature tensile testing.The results show that the mechanical properties of the steel first increase and then decrease with intercritical temperature increasing.When the intercritical temperature is 660℃,the mechanical properties of the steel are optimal,with the strength-elongation product reaching the maximum of 21.2 GPa·%.When the IQ&P process is carried out at higher and lower intercritical temperature,there is no martensite transformation due to the high stability of the retained austenite.In addition,when the intercritical temperature is 660℃,there is a clear yield platform in the tensile stress-strain curve,while it disappears when the intercritical temperature goes higher.
作者
田亚强
曹仲乾
潘红波
宋进英
郑小平
陈连生
Tian Yaqiang;Cao Zhongqian;Pan Hongbo;Song Jinying;Zheng Xiaoping;Chen Liansheng(Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan Hebei 063009,China;Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education,Anhui University of Technology,Ma'anshan Anhui 243002,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期37-41,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51574107)
国家自然科学基金钢铁联合基金(U1860105)
河北省高等学校科学技术研究项目(ZD2019064)
华北理工大学研究生创新项目(2019S05)。
关键词
中锰钢
两相区温度
IQ&P工艺
残留奥氏体
力学性能
medium manganese steel
intercritical temperature
IQ&P process
retained austenite
mechanical properties
