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Phase transformation of austempered and quench-tempered gray cast irons under laser surface hardening treatment
International Journal of Cast Metals Research ( IF 1.4 ) Pub Date : 2021-03-04 , DOI: 10.1080/13640461.2021.1898150
Bingxu Wang 1, 2 , Yuming Pan 2 , Gary Barber 2 , Rui Wang 2, 3
Affiliation  

ABSTRACT

In this research, the effects of laser surface hardening treatment on the phase transformation of austempered and quench-tempered grey cast irons were investigated. It was found that there were four zones in the matrix of austempered grey cast iron and three zones in the matrix of quench-tempered grey cast iron produced by the laser hardening process. Both cast irons had central laser-hardened zones containing ledeburite (Zone 1) and heat-affected zones (Zone 2) containing martensite. For austempering, an additional heat-affected zone (Zone 3) consisting of tempered ausferrite and a substrate (Zone 4) consisting of ausferrite was formed in the matrix, the dimensions of the laser-hardened and heat-affected regions were independent of the austempering and tempering temperatures. The results reported in this work could be used as a valuable reference for future research on laser-hardened grey cast iron applications. For quench tempering, the substrate (Zone 4) consisted of tempered martensite. Additionally



中文翻译:

激光表面硬化处理下等温淬火灰口铸铁的相变

摘要

在这项研究中,研究了激光表面硬化处理对等温淬火灰铸铁和淬火回火灰铸铁相变的影响。发现在奥氏体灰铸铁基体中有四个区带,在采用激光淬火工艺生产的淬火回火灰铸铁基体中有三个区带。两种铸铁都具有含有莱氏体的中央激光硬化区(区域 1)和含有马氏体的热影响区(区域 2)。对于奥氏体回火,在基体中形成由回火奥氏体组成的附加热影响区(区 3)和由奥氏体组成的基材(区 4),激光硬化区和热影响区的尺寸与奥氏体回火无关和回火温度。这项工作中报告的结果可作为未来激光硬化灰铸铁应用研究的宝贵参考。对于淬火回火,基材(区域 4)由回火马氏体组成。此外

更新日期:2021-03-04
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