Effects of Heat Treatment and Nitrogen on Microstructure and Mechanical Properties of 1Cr12NiMo Martensitic Stainless Steel

材料科学技术（英文）, 2012, 28(11): 1059-1066.

Effects of Heat Treatment and Nitrogen on Microstructure and Mechanical Properties of 1Cr12NiMo Martensitic Stainless Steel

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

2.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

3.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

4.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

5.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

6.Institute of Metal Research, Chinese/kcademy of Sciences~ Shenyang 110016, China

关键词：马氏体不锈钢 , 力学性能 , 显微组织 , 热处理 , 氮含量 , 奥氏体晶粒长大 , 正交试验 , 奥氏体化

Effects of Heat Treatment and Nitrogen on Microstructure and Mechanical Properties of 1Cr12NiMo Martensitic Stainless Steel

Keywords： 1Cr12NiMo martensitic stainless steel , Heat treatment , Orthogonal design , Nitrogen , Mechanical properties ,

A series of heat treatments using the orthogonal experiment method were performed to study the microstruc- ture and mechanical properties of 1Cr12NiMo martensitic stainless steel containing various nitrogen content addition. The results indicate that the optimal heat treatment is annealing at 830 ℃ for 1 h, austenitizing at 985 ℃ for 1 h followed by oil quenching, and tempering at 630 ℃ for 4 h followed by air cooling, Nitrogen addition to 1Cr12NiMo steel can effectively hinder the austenite grain growth, refine the martensite lath, and increase the strength and hardness. The impact toughness of this steel only shows a minor decrease as the nitrogen content increases.

参考文献

[1]	I. Calliari;M. Zanesco;M. Dabala;K. Brunelli;E. Ramous .Investigation of microstructure and properties of a Ni-Mo martensitic stainless steel[J].Materials & Design,2008(1):246-250.
[2]	M. Al Dawood;I. S. El Mahallawi;M. E. Abd El Azim .Thermal aging of 16Cr-5Ni-1Mo stainless steel/Part 1 - Microstructural analysis[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2004(3):363-369.

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