较短临界退火时间下中锰TRIP钢的组织及力学性能

发布时间：2018-03-17 20:33

  本文选题：连续退火　切入点：中锰TRIP钢　出处：《材料热处理学报》2017年04期 　论文类型：期刊论文

【摘要】：利用拉伸试验机、扫描电镜、透射电镜以及X射线衍射分析了临界退火温度和临界退火时间对中锰钢的微观组织以及力学性能的影响。研究结果表明:在本文所设计工艺条件下,由于临界退火时间短导致组织中的渗碳体无法完全溶解,其微观组织主要由铁素体、残留奥氏体以及渗碳体所构成;试样在650~700℃之间退火能获得良好性能,但是不同临界退火温度出现良好力学性能所需要的时间不一样,温度越高,所需要时间越短;675℃退火5 min时有最佳的力学性能,抗拉强度约为980 MPa,断后伸长率约为30%,强塑积接近30 GPa·%。
[Abstract]:Using a tensile tester, a scanning electron microscope, The effects of critical annealing temperature and critical annealing time on the microstructure and mechanical properties of medium manganese steel were analyzed by transmission electron microscopy and X-ray diffraction. Due to the short critical annealing time, the cementite in the microstructure can not be completely dissolved, and the microstructure is mainly composed of ferrite, retained austenite and cementite. However, the time required for the appearance of good mechanical properties at different critical annealing temperatures is different. The higher the temperature, the shorter the time required for annealing for 5 min at 675 鈩，

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