Effect of Solution Annealing on Microstructure and Mechanical Properties of MIM Fe-Cr-Mn-Mo-N Stainless Steels

摘要：

The influence of solution annealing on the microstructure and mechanical properties of high nitrogen Fe-Cr-Mn-Mo-N austenitic stainless steels prepared by MIM was investigated. The results show that the solution treatment can improve the microstructure and properties of the stainless steels significantly. The sintered specimens before solution annealing consist of γ-austenite and embrittling intergranular Cr2 precipitates, showing a low mechanical property. After solid solution annealing, the specimens reveal a fully austenitic structure without any intergranular nitrides, whose tensile properties are much higher than those without solution annealing, which is attributed to the elimination of the nitride precipitation along the grain boundaries and the greater amount of nitrogen retained in solid solution. A mixed mode of intergranular and dimple fracture happen to the specimens before solid solution treatment, while a completely tough fracture of dimple happen to those after solid solution treatment.

关键词： austenitic stainless steel high nitrogen metal powder injection molding (MIM) solution annealing microstructure mechanical properties

作者: Dawei CUI

作者单位: Department of machinery,Weifang University,Weifang 261061,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 886-890

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）