摘要
通过I&Q&P(两相区退火+淬火+配分)处理工艺,采用场发射扫描电子显微镜(SEM)和X射线衍射仪(XRD)等手段,研究了低碳硅锰钢中Mn元素的配分行为及其配分工艺参数对I&Q&P处理后组织与性能的影响。结果表明:经I&Q&P工艺处理,奥氏体化后并未消除I&Q工艺Mn配分效果,室温组织为板条状马氏体、残余奥氏体及少量块状马氏体。在相同配分温度下,随着配分时间延长,残余奥氏体含量是先增加后减小。材料抗拉强度总体呈现下降趋势;伸长率变化与残余奥氏体量的变化趋势基本一致。其综合性能最佳的强塑积可达29046.65 MPa·%。
Through treatment process of intercritical annealing ＆ quenching ＆ partitioning （I＆Q＆P）, the effects of the partitioning behavior of Mn elements and its partitioning parameters on microstructure and properties of low-carbon steel were investigated by using scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results show that after I＆Q＆P treatment process, the effect of Mn partitioning of I＆Q process is not eliminated, and the microstructure at room temperature is lath martensite, retained austenite and a small amount of block martensite. Under the same partitioning temperature, with partitioning time lengthening, the content of retained austenite increases at first and then decreases. The tensile strength of the material decreases in general. The changing trend of elongation is the same with that of retained austenite. The product of strength and elongation of optimal comprehensive performance can reach 29046.65 MPa. %.
出处
《热加工工艺》
CSCD
北大核心
2016年第16期161-164,共4页
Hot Working Technology
基金
河北省自然科学基金资助项目(E2014209191)
河北省教育厅科研资助项目(YQ2013003)
唐山市科学技术研究资助项目(14130228B)
