Aluminum alloy rod with heat resistance and production method of aluminum alloy rod

Abstract

The invention discloses an aluminum alloy rod with heat resistance. The aluminum alloy rod comprises not larger than 0.10% of Si, 0.10%-0.20% of Fe, not larger than 0.05% of Mg, not larger than 0.0045% of V+Ti +Cr + Mn, 0.02%-0.10% of Zr, smaller than 0.03% of Cu, smaller than 0.003% of B, smaller than 0.02% of the other single impurity, smaller than 0.1% of all the impurities and the balance aluminum. According to a production method of the aluminum alloy rod with the heat resistance, a covering agent is spread, oxidative slagging is reduced, an electromagnetic stirrer is opened, a cold material is molten quickly, the temperature is kept uniform, the compositions are uniform, slag skimming is conducted, a melt is kept clean, high-purity N2 and a refined powder spraying agent are adopted for powder spraying and refining, on-line filtering and dedusting are conducted, degassing is conducted, and the heat-resistant alloy rod meeting the production requirement is obtained. The obtained product is stable and uniform in component, compact in internal structure, smooth and clean in surface and superior in physical performance. The method is an optimum production method for producing the aluminum alloy rod with the heat resistance and is specially used for production of high-end heat-resistant alloy materials.

Description

[0001] Technical field: [0002] The invention relates to a composition of an aluminum alloy rod with heat-resistant properties and a production method thereof, which are used for producing electrical round aluminum rods for heat-resistant alloy wires. [0003] Background technique: [0004] The heat-resistant aluminum alloy rod is the main basic material for the production of heat-resistant alloy wires. After the original aluminum alloy is rolled into a round aluminum rod, it is formed by re-drawing, heat treatment, twisting, wrapping and other processes. The main requirement is that the tensile strength ≥ 165Mpa, resistivity ≤ 28.64n.Ω.m, strength residual rate ≥ 90%, and the surface is required to be free of defects such as pores, trachoma, flash, and inclusions. [0005] At present, most of the overhead transmission lines in my country use the traditional aluminum steel core stranded wire (ACSR). The production and application technology of this kind of wire is basically ma...

AI Technical Summary

Problems solved by technology

[0006] The heat-resistant aluminum alloy materials currently on the market are mainly manifested in the instability of the alloy composition, accompanied by defects such as flashes, burrs, cracks, inclusions, etc., resulting in the physical properties of the alloy wire (resistivity, elongation, tensile strength, strength residual rate) ) cannot meet the requirements of users and the market, thus causing large economic losses to both the supply and demand sides

For heat-resistant alloy materials produced by general manufacturers, the focus of production is mainly to control various harmful elements that affect resistance and heat resistance, and in order to improve performance, alloy elements such as B and Zr will be added in an appropriate amount to control , Mn four element values, due to the many types of control and strict requirements, it is difficult for many manufacturers to produce stably or cannot produce, which also makes the cost of heat-resistant alloy materials increase sharply, bringing certain economic benefits to demand enterprises burden