通过扫描电镜观察、能谱分析和力学性能检测,研究了La-Ce对304不锈钢组织和力学性能的影响。结果表明,随着La-Ce的添加,晶粒明显细化,材料的力学性能均比未添加的试样明显提高。La-Ce含量为0.145%时,材料的抗拉强度、伸长率和断面收缩率分别达到1111.19 MPa、42.31%和62.06%,分别比未添加试样提高了16.41%、31.72%、49.61%。 The effects of La-Ce on the microstructure and mechanical properties of 304 stainless steel were studied by scanning electron microscopy, energy spectrum analysis and mechanical properties testing. The results show that with the addition of La-Ce, the grain size is obviously refined, and the mechanical properties of the material are obviously improved compared with the un-added sample. When the content of La-Ce is 0.145%, the tensile strength, elongation and reduction of area are 1111.19 MPa, 42.31% and 62.06%, respectively, which increase by 16.41%, 31.72% and 49.61% respectively.