Copper-Zirconium (Zr) -Magnesium (Mg) -Mirch metal alloy and processing heat treatment

摘要

The present invention relates to the production of copper (Cu) -zirconium (Zr) -magnesium (Mg) -mixture metal alloys for resistance welding and spot welding of electrical contact materials and steel sheets, The present invention relates to a heat treatment, which comprises copper (Cu) as a main component, 0.25 to 3.00% (weight percentage) of zirconium (Zr), 0.20 to 0.50% (weight percentage) of magnesium Which is a compound of a component capable of forming precipitates such as cerium copper Cu _x Ce, lanthanum copper Cu _x La, niobium copper Cu _x Nd, and praseodymium copper Cu _x Pr during processing heat treatment, The alloy material according to claim 1, wherein mischmetal is added in the range of 0.02% to 0.50% (weight percentage). The alloy material is a processed alloy capable of maintaining hardness and conductivity at HRB 60-90 and IACS 70-95% Processing.;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, an ingot after dissolving the above-mentioned copper (Cu) alloy is produced and subjected to forging, rolling and extrusion at a temperature of 800 to 950 占 폚 with a machining ratio of 7S (about 85%) or more capable of removing the casting structure, Is cooled at 800 to 1,050 占 폚 per 1 inch thick for at least 30 minutes and then subjected to solution treatment by quenching by water cooling or oil cooling 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 ° C for 1 hour or more and then subjected to age hardening heat treatment by water cooling, oil cooling, air cooling, etc., and the materials thus processed are used in this state or parts such as electrodes are produced. 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.