What is the difference between tungsten-copper alloy and molybdenum copper alloy?
Tungsten-copper alloy is an alloy material composed of tungsten atom and copper atom, English is Copper Tungsten or Tungsten Copper, copper content is 10% ~ 50%, tungsten content is 30% ~ 95%.
Molybdenum copper alloy is a kind of alloy material composed of molybdenum atom and copper atom, English is Molybdenum-copper alloy, in many cases can replace the application of tungsten-copper alloy. According to the different chemical composition, molybdenum copper alloy grades can be divided into MoCu10, MoCu15, MoCu20, MoCu25, MoCu40, their total impurity content is less than 0.1%.
One, different nature
Tungsten-copper alloy has the characteristics of both tungsten and copper, and has good electrical and thermal conductivity, corrosion resistance, wear resistance and processing performance. When above 3000℃, the copper in the alloy will be liquefied and evaporated. Compared with tungsten copper, molybdenum copper has lower density and lighter mass, which is more suitable for the application of some products with strict requirements on weight pointer.
Molybdenum copper alloy has the characteristics of both molybdenum and copper, and has the characteristics of non-magnetism, strong high temperature resistance, high thermal conductivity, low adjustable thermal expansion coefficient, excellent vacuum performance and mechanical workability. Molybdenum copper is worse than tungsten copper in heat resistance and wetting.
Two, the production process is different
The preparation methods of tungsten-copper alloy include powder metallurgy, injection molding, copper oxide powder and tungsten matrix melting and infiltration. Among them, the process flow of WC-Cu alloy prepared by powder metallurgy method is as follows: pulverizing—batching and mixing—pressing and forming—sintering and penetration—cold processing.
The preparation methods of molybdenum-copper alloy include liquid phase sintering and molybdenum skeleton melting and infiltration. Liquid phase sintering method refers to the liquid phase sintering at the temperature of 1300-1500°C after molybdenum and copper mixed powder is pressed.
Three, different uses
W-Cu alloy is mainly used in high temperature resistant materials, electrical processing electrodes, microelectronics materials, electrical alloys for high voltage switches, etc.
Molybdenum copper alloy is suitable for the manufacture of high power microelectronic devices for military and civil use.
