本文研究了稀土对硫易切削奥氏体不锈钢切削性能及耐蚀性的影响,结果表明,由于稀土的加入,改变了硫化物的组成和形态,并显著降低了一些氧化物夹杂(Al_2O_3,SiO_2等)对切削性能的有害影响。当稀土和硫的加入量适宜时,不仅钢的切削加工性能得到显著改善,而且在H_2SO_4,HNO_3以及3％NaCl溶液中的耐蚀性也接近甚至优于基础钢。 In this paper, the effects of rare earth on the machinability and corrosion resistance of sulfur-free austenitic stainless steel were studied. The results show that the addition of rare earth changed the composition and morphology of sulfides, and significantly reduced some inclusions (Al 2 O 3, SiO 2 Etc.) have a detrimental effect on cutting performance. When rare earth and sulfur are added in appropriate amount, not only the machinability of steel is significantly improved, but also the corrosion resistance in H_2SO_4, HNO_3 and 3% NaCl solution is close to or even better than that of base steel.