Effect of microstructure morphology on mechanical properties of quenching and partitioning steel

被引：18
|
作者：
Sun, Shaoheng [1 ]
Zhao, Aimin [1 ]
机构：
[1] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2018年 / 34卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Steel; microstructure morphology; mechanical properties; RETAINED AUSTENITE; CARBON; MARTENSITE; STABILITY; FERRITE; DESIGN;
D O I：
10.1080/02670836.2017.1390901
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to illuminate the relationship between microstructure morphology and final properties of the quenching and partitioning(Q&P) steel, the samples with different microstructure morphology (equiaxed and lamellar) and same volume fraction of each phase are obtained by controlling the initial microstructure and Q&P heat treatment. Because of the feature of microstructure morphology, a large yield ratio and total elongation are obtained in the lamellar sample though yield strength and ultimate tensile strength are relatively lower than that of equiaxed sample. Moreover, the lamellar sample produces a continuous work-hardening rate and better the fracture toughness compared to the equiaxed sample. Thus the lamellar sample is more suitable to be used as automotive structural components.
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页码：347 / 354
页数：8
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