A kind of production technology of 1 series aluminum alloy casting ingot

Abstract

The invention provides a production process of a 1 series aluminum alloy ingot. The production process comprises the following steps of (A) alloying an aluminum ingot and pure aluminum wastes in a smelting furnace, wherein the smelting furnace contains 0.005-0.01wt% of titanium; (B) introducing an alloy solution to a heat preserving furnace to carry out heat preservation treatment, and adding an Al-5Ti-B block in the introducing process, wherein the alloy solution is obtained in the step (A), and the heat preserving furnace contains 0.01-0.018wt% of titanium; (C) casting the alloy solution, and adding an Al-5Ti-B wire in the front of a degassing device in the casting process to obtain the 1 series aluminum alloy ingot, wherein the alloy solution is obtained in the step (B), and the 1 series aluminum alloy ingot contains 0.015-0.025wt% of titanium. The content of titanium in the aluminum alloy ingot is kept in a reasonable range, which provides a basis for grain refinement, so that the grain size of the prepared aluminum alloy ingot is kept at the level 1.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy production technology, in particular to a production technology of a 1-series aluminum alloy ingot. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical technology. According to the difference between the content of aluminum and the added elements in aluminum alloys, aluminum alloys are divided into 1 series aluminum alloys, 2 series aluminum alloys, 3 series aluminum alloys, 4 series aluminum alloys, 5 series aluminum alloys, 6 series aluminum alloys, and 7 series aluminum alloys. Alloys, 8-series aluminum alloys and 9-series aluminum alloys, among which 1-series aluminum alloys belong to the series with the largest aluminum content, with a purity of more than 99.00wt%. [0003] In the process of preparing pure a...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned grain refinement process for 1-series aluminum alloy ingots does not take into account the actual Ti content in the melt after the melt reaches the holding furnace and passes through the degassing device. It mainly comes from Al-5Ti-B blocks and Al-5Ti-B wires. The Ti content of the melt reaching the holding furnace is generally only 0.002-0.004%, because there is a certain loss of Ti after passing through the degassing device, although before the degassing device Add 1.0~1.2Kg / tAl Al-5Ti-B wire, but the melt Ti is generally only 0.006~0.008% before the final casting

According to the actual test results, it is known that the Ti content of 0.006-0.008% cannot meet the first-grade grain size requirements of pure aluminum series aluminum alloy ingots, and the grain size of ingots is often 2-5, and the grain size is not uniform. There are many local coarse grains and feathery grains, which seriously affect the quality requirements of subsequent processing, especially the primary grain size of pure aluminum series aluminum alloy ingots used in CTP boards and "double zero" foils. Require