Copper (Cu) - Zirconium (Zr) - Mischmetal alloys and processing heat treatment

摘要

The present invention relates to the production of copper (Cu) -zirconium (Zr) -mixture metal alloys for resistance welding and spot welding of electrical contact materials and steel sheets, and processing heat treatment capable of exhibiting their properties, composed mainly of copper (Cu), and here, zirconium (Zr) is 0.25~3.00% (weight percentage), containing in the range and, where three heat treatment during processing to Solarium copper Cu _x of Cu, lanthanum copper in the Cu _x La, that you added to the audio hatred copper Cu _x Nd, and plastic new audio hatred copper Cu _x Pr precipitate of the metal miswi (mischmetal) compounds of the component which can be produced 0.02% ~0.50% (weight percentage), such as range The present invention relates to a processing heat treatment capable of maintaining the hardness and the conductivity at HRB 60-90 and IACS 70-95%, respectively.;The material thus produced has excellent hardness and conductivity at high temperature and exhibits excellent performance when it is used for resistance welding of electric contacts and steel sheets and electrodes for spot welding.;That is, the above-mentioned copper (Cu) alloy is melted and then subjected to forging, rolling, extrusion and the like at 800 to 950 占 폚 with a machining ratio of 7S (about 85% Is cooled at a temperature of 800 to 1,050 占 폚 per one inch for 30 minutes or more and then quenched by water cooling or oil cooling to carry out a solution treatment and subjected to cold working such as rolling, forging and drawing at a processing ratio of 70% The above materials are held at 350 to 550 캜 for 1 hour or more and then subjected to age hardening heat treatment by water cooling, oil cooling, air cooling and the like. The process order of the cold working and the aging hardening heat treatment may be changed according to the target characteristics of the material or the product in the case where the cold working process is omitted.