科创中国

Mechanical Properties and Microstructure Evolution of Cold-deformed High-nitrogen Nickel-free Austenitic Stainless Steel during Annealing

原文链接：万方

• 作者：

  徐明舟,刘春明

• 摘要：

  The mechanical properties and microstructure evolution of cold-deformed CrMnN austenitic stainless steel annealed in a temperature ranging from 50 ℃ to 650 ℃ for 90 min and at 550 ℃ for different time were investigated by tensile test, micro hardness test, and Transmission Electron Microscope (TEM). The steel was strengthened when it got annealed at temperatures ranging from 100 ℃ to 550 ℃, while it was softened when it got annealed at temperatures ranging from 550 ℃ to 650 ℃. Annealing temperature had stronger effect on mechanical properties than annealing time. TEM observations showed that nano-sized precipitates formed when the steel was annealed at 150 ℃ for 90 min, but the size and density of precipitates had no noticeable change with annealing temperature and time. Recrystallization occurred when the steel was annealed at temperatures above 550 ℃ for 90 min, and its scale increased with annealing temperature. Nano-sized annealing twins were observed. The mechanisms that controlled the mechanical behaviors of the steel were discussed.

• 关键词：

  annealing mechanical property microstructure twinning high nitrogen austenitic stainless steel

• 作者单位：

  Key Laboratory for Anisotropy and Texture of Materials%Ministry of Education%Northeastern University%Beijing BEIYE Functional Materials Corporation

• 基金项目：

  Funded by of Liaoning Science and Technology Bureau(No.2007221007)

• 来源期刊：

  武汉理工大学学报(材料科学版)(英文版)

• 年，卷(期)：

  2012005