690合金在去离子水和干态下的微幅冲击磨损行为研究  

Micro-amplitude impact wear behavior of 690 alloy under deionized water and dry conditions

作　　者：蔡振兵[1] 邓小剑[1] 阳荣[1] 彭金方[1] 钱浩[2] 李晨[2] 谢永诚[2] 朱旻昊[1] 

机构地区：[1]西南交通大学材料先进技术教育部重点实验室摩擦学研究所,成都610031 [2]上海核工程研究设计院,上海200233

出　　处：《振动与冲击》2015年第4期14-18,共5页Journal of Vibration and Shock

基　　金：国家杰出青年科学基金资助项目(51025519);国家自然科学基金资助项目(51375407);大型先进压水堆重大专项(2010ZX06004-18)

摘　　要：在小载荷冲击实验台上,通过改造夹具,实现了管/平面接触方式,以模拟蒸汽发生器中传热管与抗震条发生的微幅冲击磨损。以690合金传热管和405不锈钢为试验材料,在不同的冲击载荷和润滑条件(干态与去离子水中)下进行了微幅冲击磨损试验,通过分析磨痕面积、微观形貌、断口形貌和磨损区硬度等,探讨了690合金受微幅冲击磨损和失效机理。研究结果表明:在干态环境下,小载荷时690合金的磨损机制主要为氧化和剥落。随着载荷的增大,其损伤机制为氧化磨损和疲劳磨损;在去离子水环境条件下,小载荷时,损伤轻微;随着载荷的增大,其损伤机制为疲劳磨损。水介质显著的延缓了材料的开裂时间。tube and a plane steam generator. impact wear tests wear and damage Through the innovation of fixtures in a small load testing machine for impact wear, the contact between a was realized to simulate the micro-amplitude impact wear between a tube and an anti-vibration bar in a Here, a 690 alloy tube and 405 stainless steel were selected as the test materials. Micro-amplitude were conducted with different impact loads and lubrication conditions （ dry and deionized water）. The mechanisms of 690 alloy were investigated through analyzing polishing scratch area, micro-topography, fracture morphology, and micro hardness, etc. Tile results showed that the wear mechanism of 690 alloy under the small load and dry conditions is oxidation it is oxidation and fatigue wear under growing loads; under deionized water, a slight damage can be found with small loads, and the wear mechanism is fatigue wear under growing loads; water liquid delays the cracking time significantly

关 键 词：690合金 润滑条件 冲击磨损 磨损机理 

分 类 号：TH117.1[机械工程—机械设计及理论]