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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 the I & Q & P (two-phase annealing + quenching + partitioning) processing technology, field emission scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the partitioning behavior of Mn in low carbon Si- Effect of technical parameters on the microstructure and properties of I & Q & P treated. The results showed that after I and Q & P treatment, the effect of Mn distribution in I & Q process was not eliminated after austenitization. The lath martensite, retained austenite and a small amount of massive martensite were observed at room temperature. At the same partitioning temperature, the residual austenite content first increases and then decreases with the increase of partitioning time. Tensile strength of the material presents a downward trend overall; changes in elongation and retained austenite volume trends are basically the same. Its comprehensive performance of the best plastic product up to 29046.65 MPa ·%.