Effect of Grain Size on Mechanical Properties of Nickel-Free High Nitrogen Austenitic Stainless Steel

钢铁研究学报(英文版), 2009, 16(1): 58-61.

^1, , ^2, , ^3, , ^4,

1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

2.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

3.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

4.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

基金项目: 国家自然科学基金(50534010)

Effect of Grain Size on Mechanical Properties of Nickel-Free High Nitrogen Austenitic Stainless Steel

LI Hua-bing ^1, , JIANG Zhou-hua ^2, , ZHANG Zu-rui ^3, , YANG Yan ^4,

1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

2.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

3.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

4.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China

Keywords： grain refinement strengthening

The fine grained structures of nickel-free high nitrogen austenitic stainless steels had been obtained by means of cold rolling and subsequent annealing.The relationship between microstructure and mechanical properties and gain size of nickel-free high nitrogen austenitic stainless steels was examined.High strength and good ductility of the steel were found.In the grain size range,the Hall-Petch dependency for yield stress,tensile strength,and hardness was valid for grain size ranges for the nickel-free high nitrogen austenitic stainless steel.In the present study,the ductility of cold rolled nickel-free high nitrogen austenitic stainless steel decreased with annealing time when the grain size was refined.The fracture surfaces of the tensile specimens in the grain size range were covered with dimples as usually seen in a ductile fracture mode.

参考文献

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Effect of Grain Size on Mechanical Properties of Nickel-Free High Nitrogen Austenitic Stainless Steel

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