Strengthen and Toughen the Low-Alloyed Steel by Direct Tempforming

被引：4

作者：

Wang, Jun ^{[1
,2
]}

Liu, Zhixue ^{[1
]}

Luo, Tiegang ^{[2
]}

Yin, Fuxing ^{[2
]}

Liu, Baoxi ^{[3
]}

Luo, Zhichao ^{[2
]}

机构：

[1] Xian Technol Univ, Coll Mat & Chem Engn, Xian 710021, Peoples R China

[2] Guangdong Acad Sci, Inst New Mat, Guangdong Prov Iron Matrix Composite Engn Res Ctr, Guangzhou 510650, Peoples R China

[3] Hebei Univ Technol, Sch Mat Sci & Engn, Res Inst Energy Equipment Mat, Tianjin Key Lab Mat Laminating Fabricat & Interfa, Tianjin 300132, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS | 2023年 / 25卷 / 05期

基金：

中国国家自然科学基金;

关键词：

delamination toughening; low-alloyed steel; texture; toughness; worm deformation; FERRITE/CEMENTITE STEEL; MECHANICAL-PROPERTIES; BENDING BEHAVIORS; IMPACT TOUGHNESS; GRAIN-SIZE; ULTRAFINE; MICROSTRUCTURE; COMPOSITES; EVOLUTION; TENSILE;

D O I：

10.1002/adem.202101350

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Improving strength without sacrificing toughness is a permanent request for the development of advanced engineering materials. Herein, a novel energy-saving strategy is developed to obtain strong but tough low-alloyed steels. A medium-carbon steel (42CrMo) is used for demonstration. Warm deformation (tempforming) is applied to the hot-rolled and air-cooled 42CrMo steel. After tempforming, the microstructure consists of nano-sized carbides and highly textured ultrafine grains. The tensile strength of the tempformed steels can reach 1.2 GPa, while the impact toughness is higher than 100 J even at temperatures as low as -80 degrees C, which are one order of magnitude higher than the counterpart steel after tempering. The present work sheds light on the design and fabrication of high-performance engineering steels with an excellent combination of strength and toughness.

引用

页数：12

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