LASER SURFACE ALLOYING OF 40Cr STEEL WITH Ni60B POWDER AND ITS RESISTANCE TO WEAR AND CORROSION

Cor Sci Pro Tech

2009, Vol. 21

Issue (6): 577-579 DOI:

技术报告

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LASER SURFACE ALLOYING OF 40Cr STEEL WITH Ni60B POWDER AND ITS RESISTANCE TO WEAR AND CORROSION

LI Gang¹; QIU Ling²; QIU Xing-wu³

1School of Material Science and Engineering Liaoning Technical University;Fuxin 123000; 2PSM(Dalian)Co.Ltd;Dalian 116600; 3Lingyuan Iron & Steel Group Co.Ltd; Chaoyang 122500

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Abstract

The 40Cr steel has been laser surface alloyed with Ni60B powder.The alloyed layer is then characterized by SEM observation, XRD analysis and microhardeness tester.While its resistance to wear and corrosion is also examined.The results show that the alloyed layer consisted of a melted zone,a transition zone and a heat affected zone.The microstructure of melted zone is cellulardendtrite crystallites,the heat affected zone extremely small hidden martensite.Phases Cr₂₃C₆ and Cr₃C₂ are observaed.the microhardness of the alloyed layer can reach up to Hv 8.6 GPa,which is three times higher than that of the substrate.The wear and corrosion resistance of the alloyed layer is higher than that of the substrate as wall.

Key words: laser alloying wear resistance corrosion resistance

Received: 03 January 2008

TG174.44

Corresponding Authors: LI Gang E-mail: stars2387@vip.sina.com

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LI Gang; QIU Ling; QIU Xing-wu. LASER SURFACE ALLOYING OF 40Cr STEEL WITH Ni60B POWDER AND ITS RESISTANCE TO WEAR AND CORROSION. Cor Sci Pro Tech, 2009, 21(6): 577-579.

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https://www.cspt.org.cn/EN/ OR https://www.cspt.org.cn/EN/Y2009/V21/I6/577

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［2］姚津华,于春艳,孔凡志,等.汽轮机叶片的激光合金化与激光淬火［J］.动力工程,2007,27(4):652.

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