Heat-resistant tellurium-copper alloy material and preparation method thereof

Abstract

The invention relates to a heat-resistant tellurium-copper alloy material and a preparation method thereof. The heat-resistant tellurium-copper alloy material is characterized by comprising, by weight, 0.2-0.5 wt.% of Te, 0.3-0.9 wt.% of Hf, 0.1-0.2 wt.% of Ag and the balance Cu. The microalloying element Hf is added into the tellurium-copper alloy, the element Hf is separated out in copper in a nanophase mode, the solubility of the element Hf in the copper is larger than that of Zr (the trace Zr element is beneficial to the high-temperature stability of the copper alloy), the tensile strength and the high-temperature softening-resistant temperature of the tellurium-copper alloy are improved, and therefore the tellurium-copper alloy has good high-temperature stability.

Description

technical field [0001] The invention relates to the technical field of copper alloy materials, in particular to a heat-resistant tellurium copper alloy material and a preparation method thereof. Background technique [0002] The rapid development of new energy vehicles has greatly increased the demand for high-performance copper alloys. Copper and copper alloys are mainly used in battery systems, inverters, electric motors, high-voltage cables, low-voltage cables and other parts of new energy vehicles. New energy vehicles Bicycles use much more copper than traditional cars. Compared with ordinary copper alloys, the working environment of copper alloys used in new energy vehicles has four outstanding characteristics: high operating frequency, high operating power, complex and changeable working environment, and high safety requirements. Therefore, its mechanical properties, Good electrical conductivity, thermal conductivity, oxidation resistance, and softening resistance. ...

AI Technical Summary

Problems solved by technology

After the process steps of solid solution, cold rolling, aging and drawing, the prepared product has excellent mechanical and electrical properties, the tensile strength exceeds 550MPa, the electrical conductivity is greater than 90% IACS, and the elongation is about 3%. The content of Cr, Co, and Y elements with high temperature stability is low (Cr: 0.07~0.10, Co: 0.07~0.10, Y: 0.005~0.01), and the recrystallization of Cu-(Cr / Sn) alloy under the limit solid solubility The temperature is about 400°C, the recrystallization temperature of Cu-Co alloy is lower than 250°C, and the recrystallization temperature of Cu-0.25Hf alloy is about 550°C. Obviously, the high temperature resistance of Cr / Sn element is not as good as that of element Hf, and the rare earth Y is 0.05%. The above is beneficial to the softening resistance of the alloy. In this patent, it plays the role of purification and impurity removal. Therefore, trace amounts of Cr: 0.07-0.10, Co: 0.07-0.10, Y: 0.005-0.01 have a very limited increase in the anti-softening temperature of tellurium-copper alloys.