枪管用环保镀层摩擦行为研究  

Research on Friction Behavior of Environmentally Friendly Plating for Gun Barrels

作　　者：徐京[1] 胡春东 陆恒昌 邓亚辉 薛钧 韦习成[1] 董瀚[1] XU Jing;HU Chundong;LU Hengchang;DENG Yahui;XUE Jun;WEI Xicheng;DONG Han(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;No.208 Research Institute of China Ordnance Industries,Beijing 102202,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]中国兵器工业第208研究所,北京102202

出　　处：《兵工学报》2024年第2期651-661,共11页Acta Armamentarii

摘　　要：传统枪管内膛表面采用的六价铬镀层,高温耐磨性好,但对环境污染严重。为开发环保镀层,采用超景深三维显微镜、扫描电子显微镜表征了室温和高温(400℃)摩擦磨损试样,对比分析了六价铬、三价铬、钴-镍和镍-钨四种电镀层的磨损特征。研究结果表明:在500℃定性回火后,三价铬、镍-钨、六价铬和钴-镍镀层硬度依次递减,与六价铬层相比,三价铬层脆性大,镍-钨和钴-镍镀层韧性高;室温下与H62黄铜对摩后,六价铬和三价铬镀层摩擦程度较轻,钴-镍和镍-钨镀层呈现明显粘着特征,二者摩擦系数高于两种铬层;400℃下与08Al钢对摩后,六价铬呈粘着磨损特征,摩擦程度较大;三价铬层摩擦系数相对较高;镍-钨镀层呈磨粒磨损特征,摩擦系数与六价铬接近,摩擦程度相对较轻。The hexavalent chromium plating used on the bore surface of conventional barrel has good high-temperature wear resistance,but it brings a serious environmental pollution.In order to develop an environmentally friendly plating,the wear characteristics of four plating layers,i.e.,hexavalent chromium,trivalent chromium,cobalt-nickel and nickel-tungsten,are compared and analyzed by characterizing the worn specimens at room temperature and high temperature(400℃)using ultra-deep field 3D microscope and scanning electron microscope.The results show that the hardnesses of trivalent chromium,nickel-tungsten,hexavalent chromium and cobalt-nickel plating layers decrease in descending order after qualitative tempering at 500℃,and the trivalent chromium plating layer is more brittle and the nickel-tungsten and cobalt-nickel plating layers are more ductile compared with the hexavalent chromium plating layer.After friction with H62 brass at room temperature,the hexavalent chromium and trivalent chromium plating layers show light friction,while the cobalt-nickel and nickel-tungsten plating players show obvious adhesion characteristics,and their friction coefficients are higher than those of the two chromium layers.After friction with 08Al steel at 400℃,the hexavalent chromium plating layer shows adhesive wear characteristics and high friction,the friction coefficient of trivalent chromium plating layer is relatively high,while the nickel-tungsten plating layer shows abrasive wear characteristics,its friction coefficient is close to that of hexavalent chromium plating layer,and its friction was relatively light.

关 键 词：枪管 电镀层 磨损 摩擦系数 高温摩擦 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TJ203.1[金属学及工艺—金属学]