Corrosion-resistant aluminum alloy section bar and preparation method thereof
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A technology for corrosion-resistant aluminum alloys and profiles, applied in the field of aluminum alloys, can solve problems such as poor corrosion resistance, impact on appearance, and rust, and achieve the effects of increasing strength, increasing strength and yield, and improving grain structure
Active Publication Date: 2013-09-25
安徽家园铝业有限公司
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The existing aluminum alloy profiles have poor corrosion resistance. After being used as building doors and windows for a period of time, most of them will be corroded and affect the appearance
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[0014] A corrosion-resistant aluminum alloy profile, which contains components in weight percent: silicon 0.5-0.55, magnesium 0.5-0.7, zirconium 0.05-0.07, nickel 0.2-0.3, copper 0.5-0.9, zinc 0.6-0.75, boron 0.25-0.35, Antimony 0.1-0.2, lanthanum 0.016-0.026, chromium 0.35-0.45, and the balance is aluminum.
[0015] The preparation method comprises the following steps:
[0016] (1) Weigh silicon, magnesium, nickel, copper, zinc, and boron raw materials, mix them in a weight ratio of 2:2:1:2:2:1, and melt them to obtain silicon alloy blocks; weigh zirconium, antimony, and lanthanum 1. Chromium raw materials are mixed according to the weight ratio of 3:6:1:15 and melted to produce zirconium alloy block;
[0017] (2) Heat the aluminum ingot to 705-720°C to melt, remove the slag, add the prepared silicon alloy block and zirconium alloy block, and mix well, then add other alloy ingredients, mix well, and pass in refining agent for refining , slag removal; then carry out rapid ch...
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Abstract
The invention relates to a corrosion-resistant aluminum alloy section bar and a preparation method thereof. The section bar comprises the components of, by weight, 0.5-0.55% of silicon, 0.5-0.7% of magnesium, 0.05-0.07% of zirconium, 0.2-0.3% of nickel, 0.5-0.9% of copper, 0.6-0.75% of zinc, 0.25-0.35% of boron, 0.1-0.2% of antimony, 0.016-0.026% of lanthanum, 0.35-0.45% of chromium, and balance aluminum. According to the invention, rear earth elements are added into aluminum liquid, such that corrosion resistance and extrusion speed are greatly improved, surface smoothness is improved, material strength is improved, and finished product rate is improved. According to the invention, through preparing silicon alloy blocks and zirconium alloy blocks, aluminum alloy grain structure is improved, the structure of various components of an aluminum alloy ingot is more compact, and aluminum alloy section bar strength and corrosion resistance are improved. Also, a heat treatment process is improved, such that aluminum alloy section bar strength, hardness, wear resistance, and elongation rate are improved. According to testing, the yield strength reaches 240MPa, a tensile strength reaches 294MPa, and an elongation rate is 14%.
Description
technical field [0001] The invention belongs to the technical field of aluminum alloys, in particular to a corrosion-resistant aluminum alloy profile and a preparation method thereof. Background technique [0002] my country is a big producer of aluminum profiles, and architectural aluminum profiles account for the vast majority of the entire aluminum profile market, but they often provide low-end products, mainly used for building doors and windows, indoor and outdoor decoration, and curtain wall structures with low requirements. Existing aluminum alloy profiles have poor corrosion resistance. After being used as building doors and windows for a period of time, most of them will be corroded, which will affect the appearance. Contents of the invention [0003] The object of the present invention is to provide an aluminum alloy profile with high strength, high hardness and good corrosion resistance and a preparation method thereof. [0004] Technical scheme of the present ...
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