电脉冲复合激光冲击对316L不锈钢摩擦磨损及耐腐蚀性能的影响  

Effect of Electro-pulsing Combining Laser Shock on Wear and Corrosion Resistance Properties of 316L Stainless Steel

作　　者：张硕文 江熔 秦秀 王汝家 张文武[1,2] ZHANG Shuowen;JIANG Rong;QIN Xiu;WANG Rujia;ZHANG Wenwu(Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Zhejiang Key Laboratory of Aero Engine Extreme Manufacturing Technology,Ningbo 315201,China;Ningbo University,Ningbo 315000,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,宁波315201 [2]浙江省航空发动机极端制造技术研究重点实验室,宁波315201 [3]宁波大学,宁波315000

出　　处：《航空制造技术》2024年第9期44-50,共7页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52305437);宁波市自然科学基金(2022J307);中国博士后科学基金面上项目(2022M723254)。

摘　　要：不锈钢具有良好的力学性能,在航空航天、能源开发等领域受到广泛应用,但其硬度低、耐磨性较差。本文利用脉冲电流对316L不锈钢进行处理然后进行激光冲击强化(Electro-pulsing combining laser shock peening,EPLSP),并对比激光冲击强化(Laser shock peening,LSP)进行分析。研究不同工艺对显微硬度、表面形貌、摩擦磨损等特性的影响。LSP和EP-LSP处理后试样的显微硬度比原试样分别提升26.1%和38.3%。在相同的摩擦条件下,LSP和EP-LSP处理后试样的磨损率比原试样减小12.3%和30.0%。原始试样主要为黏着磨损与疲劳磨损,LSP及EP-LSP处理后试样主要为磨粒磨损,EP-LSP试样犁沟细小且深度较浅。EP-LSP试样腐蚀试验中,腐蚀电位超过1.1V电流密度逐渐增大,大于原始试样的0.4 V和LSP试样的0.7 V,表明EP-LSP试样钝化区域最大,耐腐蚀性最好。Stainless steel is widely used in aerospace,energy development and other fields for its good mechanical properties,but its hardness and wear resistance is lower.In this study,316L stainless steel is treated by electro-pulsing combining laser shock peening(EP-LSP)and laser shock peening(LSP),respectively.The effects of different processes on micro-hardness,surface morphology,friction and wear were investigated.The micro-hardness of the samples treated with LSP and EP-LSP was respectively increased by 26.1%and 38.3%,compared with the as-built samples.The wear rate of the samples treated with LSP and EP-LSP is reduced by 12.3%and 30.0%under the same friction conditions.The original samples mainly have adhesive and fatigue wear,the LSP and EP-LSP samples mainly have abrasive wear,and the furrow of EP-LSP samples is small and shallow.The current density of the EP-LSP sample increases gradually when the potential exceeds 1.1 V,which is larger than 0.4 V of the original sample and 0.7 V of the LSP sample,indicating that the passivated area of the EP-LSP sample is the largest and the corrosion resistance is the best.

关 键 词：316L不锈钢 脉冲电流 激光冲击强化 摩擦磨损 耐腐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG665[金属学及工艺—金属学]