Rare earth copper alloy and its preparation method

Abstract

The invention discloses a rare earth copper alloy and its preparation method, which comprises charging electrolytic copper by weight percentage, smelting 20-30 minutes, then charging 0.03-0.1% of zirconium, 0.02-0.16% of silver, 0.02-0.155 of rare-earth elements, smelting 1-3 minutes and casting, subjecting the cast alloy to heat preservation 1-4 hours at 800-850 deg C, forming bar stock through processing, the forging deformation amount is 50-80%, loading the bar stock into heat treatment furnace, thermally insulating 30-60 minutes at 800-950 deg C, then carrying out quenching treatment, subjecting the quenched alloy to 30-80% deformation treatment, cold drawing the alloy, thermally insulating 1-8 hours at 440-520 deg C, carrying out 50-70% deformation treatment to the alloy undergone ageing treatment. The invention can achieve high-strength and high conductivity.

Description

technical field

[0001] The invention relates to a copper-based alloy and its preparation technology, in particular to a rare earth copper alloy and its preparation method. Background technique

[0002] Copper and its alloys have been widely used in the fields of electronics, electricity, machinery, and aerospace due to their good electrical and thermal conductivity, corrosion resistance, strength, fatigue properties, and ease of preparation, and have become important electronic metal materials. For copper alloy materials, it has always been the goal to have both high strength and high conductivity. However, for copper alloys, high strength and high conductivity are a pair of contradictory characteristics.

[0003] At present, countries around the world are actively developing high-strength and high-conductivity copper alloys, such as C18040 (Cu-0.3Cr-0.25Sn-0.5Zn) and (Cu-0.3Cr-0.1Zr-0.05Mg-0.02Si), and have applied for many patents. , such as: US1658186, 1778668, 2185958, ...