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采用2种不同的真空熔渗工艺制备出WCu30合金,测定了2种合金的理化性能及力学性能;对2种合金进行了真空电击穿试验,测量其击穿时的截流值和击穿场强;使用SEM分析了2种合金的显微组织及电弧烧蚀后的表面形貌,比较了两者的抗电弧烧蚀能力。结果表明,烧骨架熔渗法制备的WCu30合金显微组织均匀,铜相平均尺寸为10~20μm;混粉熔渗法制备的WCu30合金中的铜相大小不一致,存在长条状铜相聚集体,其最大尺寸可达80~100μm。烧骨架法制备的WCu30合金的硬度、抗弯强度、抗电弧烧蚀能力高于混粉法制备的合金,其电弧侵蚀方式以铜相的蒸发气化为主,而混粉法的合金则以铜相的喷溅方式为主。烧骨架法的WCu30合金的平均耐电压强度高于混粉法合金,而平均截流值低于混粉法合金。
The WCu30 alloy was prepared by two different vacuum infiltration processes. The physical and chemical properties and mechanical properties of the two alloys were measured. The vacuum electric breakdown tests of the two alloys were carried out to measure the intercept values and breakdown fields The microstructure of the two alloys and the surface morphology after arc ablation were analyzed by SEM. The arc erosion abilities of the two alloys were compared. The results show that the microstructure of WCu30 alloy prepared by calcined framework infiltration method is uniform and the average size of copper phase is 10 ~ 20μm. The size of copper phase in WCu30 alloy prepared by mixed powder infiltration is inconsistent, The maximum size of up to 80 ~ 100μm. The hardness, flexural strength and arc ablation resistance of the WCu30 alloy prepared by the skeleton method are higher than those of the alloy prepared by the mixed powder method. The arc erosion method takes the evaporation and gasification of the copper phase as the main one, Copper-based splash method. The average compressive strength of the WCu30 alloy by the skeleton method is higher than that of the mixed powder method, while the average cutoff value is lower than that of the mixed powder method.