ENHANCEMENT OF MECHANICAL PROPERTIES AND CORROSION RESISTANCE OF LOW-CARBON STEEL WITH GRADIENT MICROSTRUCTURE BY IMPACT PEENING AND RECOVERY TREATMENT

Xiangyang Mao, Hao Liang (), Zhangzhong Wang () and Lijun Shao ()
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Xiangyang Mao: School of Materials Engineering, Nanjing Institute of Technology, No. 1 Hongjing Road, Nanjing 211167, P. R. China2Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, No. 1 Hongjing Road, Nanjing 211167, P. R. China3Jiangsu Gongchang Roll Joint-Stock Co., Ltd., Xinjian Town, Yixing 214253, P. R. China
Hao Liang: School of Materials Engineering, Nanjing Institute of Technology, No. 1 Hongjing Road, Nanjing 211167, P. R. China
Zhangzhong Wang: School of Materials Engineering, Nanjing Institute of Technology, No. 1 Hongjing Road, Nanjing 211167, P. R. China
Lijun Shao: Jiangsu Gongchang Roll Joint-Stock Co., Ltd., Xinjian Town, Yixing 214253, P. R. China

Surface Review and Letters (SRL), 2018, vol. 25, issue 02, 1-9

Abstract: A gradient microstructure was generated on a low-carbon steel/Cr alloy through severe deformation by an impact peening and a recovery treatment. The microstructure was probed by scanning electron microscopy, energy disperse spectroscopy and x-ray diffraction. The microhardness, tensile strength and electrochemical corrosion resistance of the gradient microstructure surface were studied. The material with a fine grain gradient microstructure on the surface had increased microhardness, strength, ductility and corrosion resistance compared to a low-carbon steel standard. When a Cr solution was added, a hard (Fe,Cr)7C3 phase was generated, suggesting that Cr alloying plays important roles in these enhanced properties.

Keywords: Gradient microstructure; impact peening; mechanical property; corrosion resistance; low-carbon steel (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18500488

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