Effects of cold rolling on the microstructure and properties of Fe-Cr-Ni-Mo-Ti maraging steel

被引：34

作者：

Lian, Yong ^{[1
]}

Huang, Jinfeng ^{[2
]}

Zhang, Jin ^{[1
]}

Zhao, Chao ^{[1
]}

Gao, Wen ^{[1
]}

Zhang, Zunjun ^{[2
]}

Ma, Minyu ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 712卷

关键词：

Maraging steel; Cold rolling; Age hardening; Microstructure; Mechanical properties; INCIDENTAL DISLOCATION BOUNDARIES; LATH MARTENSITE; MECHANICAL-PROPERTIES; PRECIPITATION; BEHAVIOR; ALLOY; DEFORMATION; KINETICS; PHASE;

D O I：

10.1016/j.msea.2017.12.041

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of cold deformation on the evolution of the microstructure and mechanical properties of Fe-Cr-Ni-Mo-Ti maraging steel were investigated. The microstructural changes during cold rolling were observed using optical microscopy (OM), electron back-scattered diffraction (EBSD), transmission electron microscopy (TEM) and X-ray diffraction (XRD), which were related to the mechanical properties as measured by micro-hardness and tensile testing. The remaining austenite in the as-quenched specimens was found to transform into martensite during cold deformation. High-density dislocations were produced in the martensite matrix by plastic deformation, which accelerate the aging response by promoting the formation of eta-Ni3Ti precipitates. The strain hardening was partially conserved due to static recovery during the aging process. The cold rolled steel showed a very high hardening response, resulting in an increase in yield strength during the subsequently aging treatment at 510 degrees C, with a detectable loss in ductility.

引用

页码：663 / 670

页数：8

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