Effect of One-step Partitioning Process on Microstructure and Properties of Low Alloy Wear-resistant Steel

被引：0
|
作者：
Li J. [1 ]
Jia J. [1 ]
Song X. [1 ]
Sun X. [2 ]
Fan L. [1 ]
Ma Y. [1 ]
Liang X. [2 ]
机构：
[1] The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan
[2] Department of Structural Steels, Central Iron and Steel Research Institute, Beijing
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 09期
关键词：
Low alloy wear-resistant steel; Partitioning process; Plastic toughness; Retained austenite;
D O I：
10.11896/cldb.18070167
中图分类号：
学科分类号：
摘要：
Effect of one-step partitioning process on the microstructure evolutions, mechanical properties, retained austenite content and morphology of a low alloy wear-resistant steel were studied by means of the scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). The results indicate that the microstructure is consisted of the lath primary martensite, block fresh martensite and retained austenite in the wear-resistant steel after partitioning treatment, the retained austenite is emerged in the form of thin film between martensite laths (width about 100 nm) and block along the grain boundaries (about 300-400 nm in size). As the increase of partitioning tempe-rature, the content of initial martensite decreases and the fresh martensite increases gradually, the content of retained austenite and the carbon content of the steel increase first and then decrease; as the increase of partitioning time, the martensite boundary becomes blurred and the precipitates increase, the content of retained austenite also increase first and then decrease, and the higher the retained austenite content, the better the ductility of the material. When partitioning temperature is 235℃ and time is 30 min, the content of retained austenite is highest, 8.1vol%; the carbon content is 1.02wt%, the hardness of the steel is 52.3HRC and the elongation is 12%. © 2019, Materials Review Magazine. All right reserved.
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页码：3113 / 3118
页数：5
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