不同条件下SA533 Gr.B合金钢与石墨摩擦副的摩擦磨损性能  

Friction and Wear Properties of Friction Pair Between SA533 Gr.B Alloy Steel and Graphite under Different Conditions

作　　者：田洪志 王文东[2] 王飞[2] TIAN Hongzhi;WANG Wendong;WANG Fei(Shanghai Nuclear Engineering Research&Design Co.,Ltd,Shanghai 200233,China;Shanghai Research Key Laboratory for Engineering Materials Evaluation,Shanghai Research Instituteof Materials,Shanghai 200437,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233 [2]上海材料研究所,上海市工程材料应用评价重点实验室,上海200437

出　　处：《机械工程材料》2022年第4期56-62,共7页Materials For Mechanical Engineering

基　　金：2019年度(工业强基)产业转型升级发展专项资金资助项目(GYQJ-2019-1-24)。

摘　　要：分别将石墨化度和抗压强度不同的2种石墨与SA533 Gr.B合金钢组成摩擦副,用环块摩擦试验机测试不同润滑方式下的摩擦磨损性能,对磨损形貌进行观察。结果表明:在干摩擦稳定阶段,合金钢与石墨化度高且抗压强度低的石墨配副时摩擦副的摩擦因数大于与石墨化度低且抗压强度高的石墨配副,同时石墨化度低且抗压强度高的石墨的磨损率较低;在硼酸溶液中湿摩擦条件下,合金钢与不同石墨配副时摩擦副的摩擦因数差异不大,呈波动变化趋势,石墨的磨损率均高于干摩擦条件下;在剪切应力下,石墨化度低且抗压强度高的石墨在合金钢表面形成的转移膜较薄,且与钢基体结合紧密;石墨在干摩擦和硼酸溶液中湿摩擦条件下的磨损机制均以磨粒磨损为主。Two kinds of graphite with different graphitization degree and compressive strength were combined with SA533 Gr.B alloy steel to form friction pair. The friction and wear properties under different lubrication conditions were tested by ring block friction testing machine, and the wear morphology was observed. The results show that in the stable stage of dry friction, the friction coefficient of the friction pair between alloy steel and graphite with high graphitization degree and low compressive strength was greater than that with graphite with low graphitization degree and high compressive strength, and the wear rate of graphite with low graphitization degree and high compressive strength was smaller. Under the condition of wet friction in boric acid solution, the friction coefficient of the friction pair between alloy steel and different graphite had little difference and fluctuated, and the wear rate of graphite was higher than that under dry friction. The transfer film formed by graphite with low graphitization degree and high compressive strength on alloy steel surface under shear stress was thick and closely bonded with steel substrate. The wear mechanism of graphite under dry friction condition and wet friction condition in boric acid solution was mainly abrasive wear.

关 键 词：合金钢 石墨 摩擦因数 磨损率 转移膜 

分 类 号：TB333[一般工业技术—材料科学与工程]