Method for preparing W-Cu alloy in microwave infiltration way

Abstract

The invention relates to a method for preparing W-Cu alloy in a microwave infiltration way, which comprises the following steps: 1. dispensing W powder and reduced Cu powder according to the weight percentage of W-3Cu, then ball-milling and mixing; 2. fetching the mixed powder and electrolytic copper powder according to design components, and respectively pressing the mixed powder under the pressure of 150-510MPa to form a cylindrical W framework and an infiltrated Cu pressed billet; 3. putting the pressed cylindrical W framework, the infiltrated Cu pressed billet and SiC slices into an alumina fiber heat-preserving sheath and then putting the sheath into an oven chamber of a microwave high-temperature oven, and vacuumizing the oven chamber to the vacuum degree within 100Pa by a vacuum pump; 4. injecting mixed protection gases of N2 and H2 into the oven chamber of the microwave oven, regulating the output power of the microwave high-temperature oven, heating to about 1350 DEG C at a temperature-rise speed of about 30 DEG C / min, preserving the heat, powering the microwave oven off and cooling to obtain the ideal alloy. The invention has simple process, convenient operation, short sintering period, low energy consumption and excellent performance of the obtained W-Cu alloy and can substitute for the prior process for preparing the W-Cu alloy in an infiltration way.

Description

Technical field [0001] The invention discloses a method for preparing W-Cu alloy. Especially refers to a method for preparing W-Cu alloy by microwave infiltration Background technique: [0002] W-Cu alloy is a false alloy material composed of tungsten with high melting point, high hardness, low expansion coefficient and copper with high plasticity, high electrical conductivity and thermal conductivity. It has good arc erosion resistance, welding resistance, It has the advantages of high temperature resistance, oxidation resistance and high strength; it is widely used in the industrial production of electrical contact materials, electronic packaging materials, resistance welding, EDM materials, plasma spray electrode materials, and military materials. [0003] The infiltration method is a commonly used method for preparing W-Cu alloys in industrial production. The traditional process is usually to take measures such as slow heating speed (about 5-10°C / min) and intermediate temperat...

AI Technical Summary

Problems solved by technology

[0003] The infiltration method is a common method for preparing W-Cu alloys in industrial production. The traditional process usually takes measures such as slow heating rate (about 5-10°C / min) and intermediate temperature insulation in the resistance furnace to avoid temperature gradients. Too large will cause defects such as alloy deformation and bubbling, and the obtained material has high relative density and good overall performance, but the only disadvantage is that the production process cycle is long and complicated, and the production cost is high