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激光离散预处理钢基铬层的功能梯度界面效应

Functionally Graded Interface Effects of Chromium Electrodeposits with a Laser-Discretely Treated Steel Substrate

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摘要

为揭示激光离散预处理对镀铬身管的延寿机制,研究了激光离散预处理钢基铬层的功能梯度界面(FGI)效应。结果表明,激光离散预处理使钢基体表层形成周期性梯度结构,初始镀铬层遗传了激光离散预处理基体表层的周期性梯度组织特征。FGI层因激光离散预处理在钢基体/铬层间形成,该FGI层可降低基体/铬层间的硬度梯度,大幅提高铬层的抗腐蚀剥落能力。

Abstract

The functionally graded interface (FGI) effects of a laser-discretely treated steel substrate and Cr electroplate are investigated in order to reveal the mechanism that the service life of the chromium-coated gun tubes is increased by laser-discretely pre-treating. The results show that a periodically graded structure is created on the surface layer of steel substrates due to laser-discretely pre-treating, and the periodically graded microstructural characteristics are inherited by the initially deposited chromium layer. Thus, there is an FGI layer between steel substrates and Cr coatings. The FGI layer can decrease the hardness gradient, and largely improve the corrosive-spallation resistance of Cr electrodeposits.

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中图分类号:TN249;TG156.99

DOI:10.3788/cjl201138.0303005

所属栏目:激光制造

基金项目:国防重点实验室基金(2009319)资助课题。

收稿日期:2010-08-04

修改稿日期:2010-10-27

网络出版日期:0001-01-01

作者单位    点击查看

李怀学:北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024
陈光南:中国科学院力学研究所, 北京 100080
巩水利:北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024

联系人作者:李怀学(lhx1022@126.com)

备注:李怀学(1977—),男,博士,工程师,主要从事激光表面改性和快速制造技术及装备等方面的研究。

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引用该论文

Li Huaixue,Chen Guangnan,Gong Shuili. Functionally Graded Interface Effects of Chromium Electrodeposits with a Laser-Discretely Treated Steel Substrate[J]. Chinese Journal of Lasers, 2011, 38(3): 0303005

李怀学,陈光南,巩水利. 激光离散预处理钢基铬层的功能梯度界面效应[J]. 中国激光, 2011, 38(3): 0303005

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