摘要
采用CCT-AY-Ⅱ热处理连退模拟机,研究了不同配分时间下,两相区退火温度淬火和碳再分配热处理工艺对低碳硅-锰系Q&P钢的显微组织、精细结构、力学性能及残留奥氏体含量的影响。结果表明,采用不同配分时间的两相区连续退火的Q&P工艺室温组织为板条马氏体、铁素体、薄膜状或块状残留奥氏体;随配分时间的增加,钢的抗拉强度和残留奥氏体含量呈下降趋势,伸长率和强塑积呈上升趋势;当配分时间为300 s时,试验钢抗拉强度达到1000 MPa,其伸长率为27.3%,强塑积高达27 300 MPa.%。
Effect of the different partitioning time heat treatment process on microstructure and mechanical properties of the low carbon Si- Mn Q＆P steel were investigated by using a thermo-mechanical simulator CCT-AY-lI. The results show that lath martensite, ferrite and retained austenite are obtained in the tested steel. With the partitioning time going up, the tensile strength and retained austenite of the tested steel decrease, while the elongation and TS ~ TEL （ tensile strength × total elongation ） of the tested steel increase. When the partition time is 300 s, the tested steel exhibits high ultimate tensile strength exceeding 1000 MPa and fine elongation of 27.3% and TS x TEL of 27 300 MPa · %.
出处
《金属热处理》
CAS
CSCD
北大核心
2012年第11期95-99,共5页
Heat Treatment of Metals
关键词
Q&P工艺
板条马氏体
残留奥氏体
TRIP效应
配分时间
quenching and partitioning（Q＆P） process
lath martensite
retained austenite
TRIP effect
partitioning time
