Aluminum-tellurium intermediate alloy and preparing method and application thereof

Abstract

The invention relates to aluminum-tellurium intermediate alloy which is composed of, by mass, 0.1-0.48% of tellurium and 52%-99.9% of aluminum. A preparing method comprises the following steps that firstly, dosing is carried out; secondly, smelting is carried out, wherein the aluminum is put into a heating furnace to be preheated, heating is carried out under the protection of inert gas or under the condition of adding a covering agent, the aluminum is fully melted to obtain molten aluminum, the adding amount of the covering agent is 0.5%-2% of the total mass of the aluminum and the tellurium, the tellurium is pressed into the molten aluminum at 680-800 DEG C in batches, after the tellurium is all added into the molten aluminum and melted, the temperature is adjusted to 680-740 DEG C, heat preservation stirring is carried out for 5-30 minutes, drossing is carried out, a refining agent is added to carry out refining with the temperature maintained after drossing, and then standing heat preservation is carried out for 5-10 minutes; thirdly, pouring is carried out. The invention further provides application of the aluminum-tellurium intermediate alloy in preparing aluminum alloy containing tellurium. By means of the aluminum-tellurium intermediate alloy and the preparing method, the yield of the tellurium in the aluminum alloy containing tellurium can be improved, the yield of the tellurium is stable and easy to control, and the tellurium is evenly distributed in the aluminum alloy.

Description

technical field [0001] The invention belongs to the field of aluminum and aluminum alloy materials, and in particular relates to an aluminum-tellurium master alloy and its preparation method and application. Background technique [0002] Due to the advantages of abundant resources, light weight, high specific strength, good electrical and thermal conductivity, and strong corrosion resistance, aluminum alloys are widely used in various fields such as machinery manufacturing, transportation machinery, power machinery, chemical industry, aviation industry, and military. With the development of the automobile, electronics, machinery and other industries towards lightweight, precision and intelligence, especially the rapid development of the automobile industry, higher requirements are put forward for the comprehensive performance of aluminum alloys. Therefore, how to improve the comprehensive properties of aluminum alloys has become an important and difficult point in the resear...

AI Technical Summary

Problems solved by technology

Due to the low melting and boiling point of tellurium (melting point is 452°C, boiling point is 1390°C), burning loss and oxidation are prone to occur at the conventional melting temperature of aluminum alloy (740°C), resulting in low yield of tellurium in aluminum alloy, and Yield is unstable and difficult to control

At the same time, due to the high density of tellurium (6.25g / cm 3 ), tellurium tends to segregate and precipitate during the smelting process, and tellurium is partially distributed unevenly and deposited at the bottom of the crucible, resulting in uneven distribution of tellurium in the prepared aluminum alloy, low yield, and affecting the mechanical properties of the aluminum alloy and electrical conductivity