自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 10    No. 1    March 2003

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Effects of sintering atmosphere on the microstructure and
mechanical property of sintered316L stainless steel
LI Song-lin(李松林), HUANG Bai-yun(黄伯云), LI Yi-min(李益民),
LIANG Shu-quan(梁叔全), LI Du-xin(李笃信), FAN Jin-lian(范景莲),JIANG Feng (姜 峰)

State Key Laboratoryfor Powder Metallurgy, Central South University, Changsha410083, China

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.

 

Key words: powder metallurgy; 316L stainless steel; sintering; microstructure; mechanical property

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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