Effects of sintering atmosphere on the microstructure and mechanical property of sintered316L stainless steel
来源期刊：中南大学学报(英文版)2003年第1期
论文作者：李松林 黄伯云 李益民 梁叔全 李笃信 范景莲 姜峰
文章页码：1 - 6
Key words：powder metallurgy; 316L stainless steel; sintering; microstructure; mechanical property
Abstract: In the present work, N2, N2+H2, Ar and Ar+H2, were used as the sintering atmosphere of Metal Injection Molded 316L stainless steel respectively. The influences of the sintering atmospheres on C, O, N contents of the sintered specimens, sintered density, grain morphology and mechanical properties were investigated. The results show that C, O, N contents of the sintered specimens can be controlled in permitted low values. The ultimate tensile strength and elongation of the specimen sintered in N2+H2atmosphere are 765 MPa and 32% respectively. Using Ar and Ar+H2 as the sintering atmosphere, the density of the sintered specimens is 98% of the theoretical density; the pores are uniformly distributed as small spherical shape and the grain size is about 50μm. The mechanical properties of the specimen, i.e. ultimate tensile strength 630 MPa, yield strength 280 MPa, elongation 52%, HRB 71, are much better than those of the American Metal Powder Industries Federation(MPIF) 35 Standard after being sintered in Ar+H2.
