65Mn钢犁面喷丸/仿蛤贝壳微织构复合改性层的摩擦学特性  

Tribological properties of shot peening/bionic clam shell micro-texture composite modified layer of 65Mn steel plow surface

作　　者：刘承洲 吴科阳 王英东 赵德永 王远[1,2] Liu Chenghou;Wu Keyang;Wang Yingdong;Zhao Deyong;Wang Yuan(Faculty of Machinery and Transaction,Southwest Forestry University,Kunming Yunnan 650224,China;Key Laboratory of Forest Disaster Warning and Control of Yunnan Province,Kunming Yunnan 650224,China)

机构地区：[1]西南林业大学机械与交通学院,云南昆明650224 [2]云南省森林灾害预警与控制重点实验室,云南昆明650224

出　　处：《金属热处理》2024年第12期243-248,共6页Heat Treatment of Metals

基　　金：云南省农业基础研究联合基金重点项目(202301BD070001-012)。

摘　　要：采用超声波喷丸对65Mn钢犁面进行表面强化,再激光加工仿蛤贝壳微织构实现减粘降阻,分别构筑织构率为19%、23%和37%的喷丸/仿蛤贝壳微织构复合改性层,并对不同改性下的摩擦学特性进行对比研究。在HSR-2M型往复式摩擦磨损试验机上进行人工配制蚯蚓液润滑下的摩擦学性能试验;采用HV-1000D维氏硬度计与TR200粗糙度测量仪分别测量试样硬度与表面粗糙度;采用M330BD-HK830金相显微镜与S-4800FE扫描电镜分别观察试样表面结构与磨痕形貌。结果表明,单一超声波喷丸65Mn钢犁面的表面粗糙度变大使摩擦因数增大,硬度提高使抗磨性增强;未喷丸织构率为23%的单一仿蛤贝壳微织构对65Mn钢犁面减摩抗磨性能的提升有限,相比于未喷丸未织构试样的摩擦因数与磨损率分别降低4.83%与29.18%;喷丸强化/仿蛤贝壳微织构均能不同程度地提升65Mn钢犁面的减摩抗磨性,织构率为37%的试样表现出最优的减摩抗磨性,相比于未喷丸未织构试样,摩擦因数与磨损率的最大降幅分别高达23.45%和86.77%。Ultrasonic shot peening was first applied to strengthen the plow surface of 65Mn steel,followed by laser processing to create bionic clam shell micro-texture for reducing adhesion and drag.A shot-peening/bionic clam shell micro-texture composite modified layers with texture ratios of 19%,23%and 37%were formed,and tribological properties tests were conducted under lubrication with artificially prepared earthworm fluid by using the HSR-2M reciprocating friction and wear tester.The hardness and surface roughness of the specimens were measured by using HV-1000D Vickers hardness tester and TR200 roughness tester,respectively.Surface structure and wear scar morphology were observed by using M330BD-HK830 metallurgical microscope and S-4800FE scanning electron microscope.The results show that ultrasonic shot peening alone increases the surface roughness of the 65Mn steel plow,which leads to an increase in the friction coefficient,while the improved hardness enhances wear resistance.The single bionic clam shell micro-texture with a texture ratio of 23%,without shot peening,provides limited improvement in the friction-reducing and wear-resistance of the 65Mn steel plow,reducing the friction coefficient and wear rate by 4.83%and 29.18%,respectively,compared to the unpeened and untextured specimen.Both shot peening and bionic clam shell micro-texture improve the friction-reducing and wear-resistant properties of the 65Mn steel plow to varying degrees.The specimen with texture ratio of 37%exhibits the best friction-reducing and wear-resistant properties,with maximum reductions in the friction coefficient and wear rate of 23.45%and 86.77%,respectively,compared to the unpeened and untextured specimen.

关 键 词：65Mn钢犁面 喷丸强化 仿蛤贝壳微织构 摩擦学特性 

分 类 号：TH117.1[机械工程—机械设计及理论]