Phase Transformation During Intercritical Tempering with High Heating Rate in a Fe-13%Cr-4%Ni-Mo Stainless Steel

被引：6

作者：

Wang, Pei ^{[1
]}

Zhang, Shenghua ^{[1
]}

Lu, Shanping ^{[1
]}

Li, Dianzhong ^{[1
]}

Li, Yiyi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2013年 / 26卷 / 06期

基金：

美国国家科学基金会;

关键词：

Martensitic stainless steel; Phase transformation; Intercritical tempering; Heating rate; Microstructure; REVERSE TRANSFORMATION; RETAINED AUSTENITE; LATH MARTENSITE; MECHANISM; PRECIPITATION; TEMPERATURE; BEHAVIOR;

D O I：

10.1007/s40195-013-0314-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The phase transformation from martensite to austenite during intercritical tempering with high heating rate in a low carbon nnartensitic stainless steel Fe-13%Cr-4%Ni-Mo has been investigated to clarify the microstructure evolution in some regions of the weld joint heat affected zone (HAZ). The experimental results indicate that the start and finish temperatures of the martensite to austenite transformation keep constant when the heating rate is higher than. 10 K/s, and the transformation is much faster than nickel diffusion. The mechanism of the martensite to austenite transformation changes from diffusion to diffusionless during the intercritical tempering when the heating rate is higher than 10 K/s. The diffusionless transformation and higher A(s) temperature render it difficult for any austenite to remain at room temperature during the intercritical tempering with high heating rate that occurs in the HAZ. Adding a proper intercritical tempering with low heating rate can induce some reversed austenite in the rapid heated sample.

引用

页码：669 / 674

页数：6

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