深冷循环处理对铁基非晶涂层结构和摩擦磨损性能的影响  

Effects of Deep Cryogenic Cycle Treatment on the Structure and Tribological Properties of Fe-Based Amorphous Coatings

作　　者：赵建华[1] 黄莉婷 庄曙东[2] 田芳 纪秀林 ZHAO Jianhua;HUANG Liting;ZHUANG Shudong;TIAN Fang;JI Xiulin(College of Materials Science and Engineering,Hohai University,Changzhou 213022,China;College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213022,China;Department of Mechanical Engineering,Shantou University,Shantou 515063,China)

机构地区：[1]河海大学材料科学与工程学院,江苏常州213022 [2]河海大学机电工程学院,江苏常州213022 [3]汕头大学机械工程系,广东汕头515063

出　　处：《材料保护》2024年第11期93-100,109,共9页Materials Protection

基　　金：国家自然科学基金(51875169);河海大学大学生创新训练项目(202310294013Z)。

摘　　要：针对铁基非晶涂层塑韧性差的问题,对铁基非晶涂层进行了不同循环次数的深冷循环处理,研究了30次和60次深冷循环处理对涂层结构和摩擦磨损性能的影响。结果表明:深冷循环处理后,涂层仍与基体结合良好,呈典型的层状结构。深冷循环处理没有改变涂层的结构和非晶态本质,但提高了涂层的驰豫焓,涂层的自由体积含量增加,发生了回春现象。深冷循环处理的涂层在不同载荷(5,10,20 N)下的平均摩擦系数和磨损率均在30次时最低,H/E和H^(3)/E^(2)值最大,耐磨性最好。未处理涂层在不同载荷下的磨损机制以脆性剥落为主。深冷循环处理后,涂层的磨损机制由脆性剥落向磨粒磨损转变。深冷循环处理有助于提高铁基非晶涂层的耐磨性。To address the issue of poor plasticity and toughness of Fe-base amorphous coatings,deep cryogenic cycling treatment(DCT)was applied with varying numbers of cycles.The effects of 30 and 60 cycles of DCT on the structure and tribological properties of the coatings were studied.Results showed that the coating was still well adhered to the substrate and exhibited a typical layered structure after DCT.The structure and amorphous nature of the coating were not changed by DCT,but the relaxation enthalpy of the coating was increased.The free volume content of the coating was increased,and rejuvenation phenomenon was observed.The coating treated with 30 deep cryogenic cycles had the lowest average friction coefficient and wear rate,the highest H/E and H^(3)/E^(2) values,and the best wear resistance under different loads(5,10,20 N).The wear mechanism of the untreated coating under different loads was mainly brittle spalling.After DCT,the wear mechanism of the coating was changed from brittle spalling to abrasive wear.Deep cryogenic cycle treatment was found to enhance the wear resistance of Fe-based amorphous coating.

关 键 词：铁基非晶涂层 深冷循环处理 结构 摩擦磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]