Q&P工艺对20Si2Mn钢组织和力学性能的影响  

Influence of Q&P process on microstructure and mechanical properties of 20Si2Mn steel

作　　者：于燕[1] 刘洋[1] 刘刚[1] 

机构地区：[1]长春工业大学先进结构材料省部共建教育部重点实验室,吉林长春130012

出　　处：《金属热处理》2015年第1期120-123,共4页Heat Treatment of Metals

摘　　要：对经不同Q&P工艺处理后的20Si2Mn钢静拉伸性能进行研究。结果表明,Q&P处理过程中,随着淬火终点温度的升高,试验钢的抗拉强度逐渐降低,伸长率逐渐升高且普遍高于10%;随着配分时间的延长,试验钢的抗拉强度随之降低,但伸长率随之升高,最高达到16.8%。在TA=900℃、TQ=270℃、TP=400℃、tP=300 s的条件下,其显微组织组成相为减碳马氏体、富碳的残留奥氏体时最终获得了21 430 MPa·%的最高强塑积。The static tensile properties of 20Si2Mn steel treated by the different Q&P processes were studied.The results indicate that with the increasing of quenching temperature, the tensile strength of test steel gradually decreases, the elongation increases and higher than 10%. With the duration of partitioning, the tensile strength of steel decreases, while the elongation increases and reaches 16.8%.Under the condition of TA =900 ℃,TQ =270 ℃,TP =400 ℃,tP =300 s,the microstructure of the tested steel is composed of carbon-poor martensite and carbon-rich retained austenite.The highest product of strength and elongation of the steel at last reaches 21 430 MPa· %.

关 键 词：Q&P工艺 显微组织 力学性能 残留奥氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]