CAJ | 학술논문

采用等离子喷涂在金属钼棒表面沉积W涂层，对所得W/Mo棒进行高温烧结-旋锻处理，观察处理前后沉积层、基体及界面的显微形貌，测试W涂层与Mo基体的晶粒度、相对密度和显微硬度，研究高温烧结-旋锻处理对W/Mo棒结构与性能的影响。结果表明：高温烧结-旋锻后，W沉积层的相对密度达到98.5%，比处理前提高了15.9%，显微硬度为620.4HV0.025，提高了81.6%；而Mo基体的相对密度为99.5%，提高了0.71%，显微硬度为244.5HV0.025，降低了4.8%；W沉积层晶粒长大不明显，外部晶粒轴向拉长最明显，中部次之，内部几乎没有变形；而Mo基体晶粒明显长大至300μm，变形程度比W显著；此外，W/Mo界面高温烧结后形成100μm的大小晶粒过渡区，旋锻后没有出现明显的裂纹。
채용등리자분도재금속목봉표면침적W도층，대소득W/Mo봉진행고온소결-선단처리，관찰처리전후침적층、기체급계면적현미형모，측시W도층여Mo기체적정립도、상대밀도화현미경도，연구고온소결-선단처리대W/Mo봉결구여성능적영향。결과표명：고온소결-선단후，W침적층적상대밀도체도98.5%，비처리전제고료15.9%，현미경도위620.4HV0.025，제고료81.6%；이Mo기체적상대밀도위99.5%，제고료0.71%，현미경도위244.5HV0.025，강저료4.8%；W침적층정립장대불명현，외부정립축향랍장최명현，중부차지，내부궤호몰유변형；이Mo기체정립명현장대지300μm，변형정도비W현저；차외，W/Mo계면고온소결후형성100μm적대소정립과도구，선단후몰유출현명현적렬문。
A molybdenum bars and a tungsten deposition on the surface of metal molybdenum rod (W/Mo bars) are processed by high temperature sintering and rotary swaging. Microstructure before and after the treatment of tungsten layer, molybdenum matrix and W/Mo interface are observed, and tungsten coating and molybdenum substrate grain size, relative density and micro hardness are tested. Effect of high temperature sintering-rotation swaging treatment to properties and structure of W/Mo rod are discussed. The results show that, after high temperature sintering (2 300℃, 6 h)and rotary swaging, tungsten deposition layer density is 98.5 %, increased by 15.9 % than that before the treatment, the micro-hardness is 620.4HV0.025, increased by 81.6%, and the density of molybdenum matrix is 99.5%, increased by 0.71%, the micro-hardness of Mo is 244.5HV0.025, reduced by 4.8%. Tungsten deposition layer grain growth is not obvious, elongation grade of external grains of tungsten coating is more obvious than the central one, and the internal one is undeformed. While the Mo matrix grains grow up to 800 μm, is more significant than W coating. In addition, the W/Mo interface and grain transition zone with grain size 100 μm are formed after high temperature sintering, but no obvious crack is found after rotary swaging.