论文部分内容阅读
通过对T8A钢进行普通淬火+回火和脉冲磁场淬火+回火,结果发现其显微组织主要是马氏体+粒状渗碳体+少量残余奥氏体。二者之间最明显的区别是非磁场热处理试样中存在大量密集的二次渗碳体,相比之下加磁处理试样中的粒状渗碳体析出量要少得多,而且晶粒更加细化。因此,磁场热处理与普通热处理相比有以下优势:使T8A钢的韧性、抗拉强度和伸长率都有不同程度的提高。
T8A steel by ordinary quenching and tempering and pulsed magnetic field quenching + tempering, the results showed that the main microstructure of martensite + granular cementite + a small amount of residual austenite. The most obvious difference between the two is that there is a large amount of dense secondary cementite in the non-magnetic field heat-treated specimen, which is much less precipitated than the granular cementite in the magnetically-treated sample, and the grains are more Refine. Therefore, the magnetic field heat treatment compared with the ordinary heat treatment has the following advantages: T8A steel toughness, tensile strength and elongation have varying degrees of improvement.