使用光学显微镜(OM)、扫描电子显微镜(SEM)观察不同稀土Y含量30Cr13马氏体不锈钢试样的显微组织,通过萃取试验、X射线衍射仪(XRD)研究了不同试样析出相的变化情况,并测试了相关力学性能.研究结果表明:适量的稀土Y添加到30Cr13马氏体不锈钢中,抑制碳化物的析出,可以改善碳化物的网状结构,使碳化物分布更加均匀弥散.但稀土含量继续增多时,碳化物趋于链状分布,同时引起夹杂物增多,导致抗拉强度降低.%In this paper,the microstructure of 30Cr13 martensitic stainless steel samples with different rare earth Y content was observed by optical microscopy (OM) and scanning electron microscopy (SEM).The changes of precipitation phase of different samples were investigated by extraction test and X-ray diffraction (XRD).The related mechanical properties were also tested.The results show that the adding of appropriate amount of rare earth Y to 30Cr13 martensitic stainless steel could inhibit the precipitation of carbides and improve the network structure of carbides,so that the distribution of carbides was evenly dispersed.When the rare earth content continues to increase,the carbides distribution tends to be chained,while the increase of inclusions leads to the significant decrease of tensile strength.
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