低合金马氏体钢中的ω相
收稿日期: 2013-04-23
修回日期: 2013-05-14
网络出版日期: 2013-07-11
基金资助
国家自然科学基金项目 51271200和51271010资助
THE ω PHASE IN A LOW ALLOY MARTENSITIC STEEL
Received date: 2013-04-23
Revised date: 2013-05-14
Online published: 2013-07-11
平德海 , 殷匠 , 刘文庆 , 宿彦京 , 戎利建 , 赵新青 . 低合金马氏体钢中的ω相[J]. 金属学报, 2013 , 49(7) : 769 -774 . DOI: 10.3724/SP.J.1037.2013.00206
The microstructure of a low alloy martensitic steel has been investigated using TEM. It was indicated that the as-quenched plate and lath martensites consist of ferrite matrix and high density of nanometer-scaled ultrafine particles embedded in the matrix. These particles were designated to beω phase with a primitive hexagonal crystal structure. Theω particles exhibit an orientation relationship with the ferrite (α-Fe) matrix as follows: [113]α//[2113]ω,(110)α //(1101)ω and (211)α//(0110)ω, with lattice parameters of aω=21/2aα , cω=31/2/2aα. The results of the present study suggested that the carbon atoms in the steel are not homogenously distributed in the martensites. The ferrite matrix possesses very low content of carbon, and most of the carbon atoms are concentrated in the ω phase.
Key words： Martensite; ω phase; C; microstructure; TEM
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