激光技术2012，Vol.36Issue(4)：527-531,5.DOI:10.3969/j.issn.1001-3806.2012.04.024
激光淬火基体对镀铬层界面剪切强度的影响
Effect of laser-quenching substrate on interfacial shear strength of chromium plated coatings
张国祥 1姚东伟1
作者信息
- 1. 江海职业技术学院机电工程系,扬州225101
- 折叠
摘要
Abstract
Based on the real condition that laser quenching steel substrate could improve the service life of chromium-plated gun bore, the interfacial shear strengths of Cr-plating coating on laser re-quenching substrate and laser non-treating one were measured by multi-cracks tensile method respectively. The experimental results show that the interfacial shear strength is increased by 77.7% through laser re-quenching steel substrate. The analysis of interface structure between substrate and Cr-coating shows thai the interface of laser pretreatment is a continuous transition, while there is an over-layer on the original interface. The mechanical model analysis shows that the compressive residual stress in the laser processing zone could increases fracture stress of chromium coating and the improvement of substrate surface hardness decreases maximum crack spacing. The synthetic result of above two effecting factors is that the interfacial shear strength is increased by laser re-quenching substrate.关键词
激光技术/激光淬火/镀铬层/界面剪切强度/多裂纹拉伸法/残余压应力/硬度Key words
laser technique/laser quenching/Cr-plating coatings/interfacial shear strength/multi-cracks tensile method/compressive residual stress/hardness分类
信息技术与安全科学引用本文复制引用
张国祥,姚东伟..激光淬火基体对镀铬层界面剪切强度的影响[J].激光技术,2012,36(4):527-531,5.
