CAJ | 학술논문

为了研究热轧 Fe -6Mn -3Al TRIP 钢组织演变和力学性能,对实验钢采用淬火+不同时间退火(ART)的热处理工艺.研究发现,随着退火时间的增加,奥氏体晶粒尺寸增大、稳定性降低,冷却过程中部分奥氏体相变为马氏体；其中退火10 min 后,实验钢性能最优,其残余奥氏体体积分数能达到50.3%,抗拉强度765 MPa,总延伸率达到49.1%；拉断后实验钢中的奥氏体含量减少,马氏体含量增加,其中,退火10 min 后的实验钢 TRIP 效应最为明显,奥氏体体积分数由变形前的50.3%降低到变形后的11%,奥氏体转化率为78%.
위료연구열알 Fe -6Mn -3Al TRIP 강조직연변화역학성능,대실험강채용쉬화+불동시간퇴화(ART)적열처리공예.연구발현,수착퇴화시간적증가,오씨체정립척촌증대、은정성강저,냉각과정중부분오씨체상변위마씨체；기중퇴화10 min 후,실험강성능최우,기잔여오씨체체적분수능체도50.3%,항랍강도765 MPa,총연신솔체도49.1%；랍단후실험강중적오씨체함량감소,마씨체함량증가,기중,퇴화10 min 후적실험강 TRIP 효응최위명현,오씨체체적분수유변형전적50.3%강저도변형후적11%,오씨체전화솔위78%.
Microstructure evolution and mechanical properties of a hot-rolled Fe-6Mn-3Al TRIP steel were studied by using the heat treatment process of quenching and annealing for different time (ART).The results showed with the increase of annealing time,the grain size of austenite increases and the stability decreases.Part of the austenite transforms into martensite in the cooling process.After annealing for 10 min,the performance of the experimental steel is optimal.The volume fraction of austenite is 50.3%,the ultimate tensile strength is 765 MPa and the total elongation is 49.1%.The content of the austenite decreases and the martensite increases after deformation.The TRIP effect is most obvious after annealing for 10 min.The volume fraction of austenite reduces from 50.3% to 1 1 % after deformation.The transformation rate of austenite is 78%.