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A kind of wear-resistant aluminum alloy and its preparation process

A preparation process, aluminum alloy technology, applied in the field of metal material smelting, can solve the problems of poor surface quality, low product mechanical properties, high inclusion content, etc., and achieve the effect of improving corrosion performance, high hardness and high strength

Active Publication Date: 2019-01-29
浙江大侠铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aluminum alloy slabs obtained by direct melting and casting of electrolytic aluminum liquid have poor surface quality, such as cracks, cold shuts and other defects, high content of inclusions and uneven distribution, and low mechanical properties of processed products. kind of problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A wear-resistant aluminum alloy, based on the total amount of aluminum alloy profiles, by weight percentage, the wear-resistant aluminum alloy contains the following elements: Si 9.13%, Zn 1.92%, Mn 1.34%, Mg 0.72%, Ni 0.23 %, Cu 0.10%, Ti0.34%, nitrogen 0.40%, lanthanides 0.09%, the rest is Al and unavoidable impurities, wherein, the nitrogen element in the aluminum alloy profile exists in the form of nitride, the nitrogen The compound is titanium nitride;

[0033] The preparation process of the wear-resistant aluminum alloy includes the following steps:

[0034] (1) Ingredients and smelting: Add aluminum ore, zinc ore, magnesium ore, nickel ore, and copper ore into the smelting furnace, then vacuumize the furnace cavity to 1×10-4Pa, and then pass nitrogen into the furnace cavity to make The pressure in the furnace reaches 45Pa, and the temperature is raised to 625°C until the ore is completely melted, and then kept at 660°C for 4 hours, then manganese ore and silicon ...

Embodiment 2

[0039] A wear-resistant aluminum alloy, based on the total amount of aluminum alloy profiles, by weight percentage, the wear-resistant aluminum alloy contains the following elements: Si 8.23%, Zn 2.79%, Mn 1.56%, Mg 0.82%, Ni 0.18 %, Cu 0.09%, Ti0.33%, nitrogen 0.44%, yttrium-series elements 0.07%, and the rest are Al and unavoidable impurities, wherein, the nitrogen element in the aluminum alloy profiles exists in the form of nitrides, and the nitrogen The compound is aluminum nitride;

[0040] The preparation process of the wear-resistant aluminum alloy includes the following steps:

[0041] (1) Ingredients and smelting: Add aluminum ore, zinc ore, magnesium ore, nickel ore, and copper ore into the smelting furnace, then vacuumize the furnace cavity to 1×10-4Pa, and then pass nitrogen into the furnace cavity to make The pressure in the furnace reaches 40Pa, and the temperature is raised to 620°C until the ore is completely melted, and then kept at 650°C for 3 hours, then ma...

Embodiment 3

[0046] A wear-resistant aluminum alloy, based on the total amount of aluminum alloy profiles, by weight percentage, the wear-resistant aluminum alloy contains the following elements: Si 9.23%, Zn 1.95%, Mn 0.95%, Mg 0.82%, Ni 0.30 %, Cu 0.14%, Ti0.39%, nitrogen 0.45%, niobium series elements 0.06%, and the rest are Al and unavoidable impurities, wherein, the nitrogen element in the aluminum alloy profiles exists in the form of nitrides, and the nitrogen The compound is silicon nitride;

[0047] The preparation process of the wear-resistant aluminum alloy includes the following steps:

[0048] (1) Ingredients and smelting: Add aluminum ore, zinc ore, magnesium ore, nickel ore, and copper ore into the smelting furnace, then vacuumize the furnace cavity to 1×10-4Pa, and then pass nitrogen into the furnace cavity to make The pressure in the furnace reaches 45Pa, and the temperature is raised to 620°C until the ore is completely melted, and then kept at 650°C for 3 hours, then man...

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Abstract

The invention relates to the technical field of metal material smelting, in particular to wear-resistant aluminum alloy and a preparation technology thereof. Based on the total quantity of aluminum alloy sections, the wear-resistant aluminum alloy comprises, by weight, 6.18-12.87% of Si, 1.28-3.56% of Zn, 0.89-1.75% of Mn, 0.56-0.95% of Mg, 0.12-0.31% of Ni, 0.03-0.16% of Cu, 0.26-0.48% of Ti, 0.16-0.54% of nitrogen, 0.005-0.12% of microelements, and the balance Al and unavoidable impurities. The silicon-containing high-strength aluminum alloy contains wear-resistant material nitrides, so that the wear resistance of the aluminum alloy is improved. In addition, the nitrides have the characteristics of high hardness and high strength, thus improving the strength and hardness of the aluminum alloy. The wear rate of the wear-resistant aluminum alloy is 0.018-0.029gm-2s-1, the hardness is 95.9-126.9HBW, and the alkali corrosion resistance of the wear-resistant aluminum alloy is significantly improved.

Description

technical field [0001] The invention relates to the technical field of metal material smelting, in particular to a wear-resistant aluminum alloy and a preparation process thereof. Background technique [0002] Aluminum-silicon alloy is a common aluminum alloy. Changes in the ratio of aluminum to silicon can have a great impact on hardness. For example, when the silicon content is less than 7%, the aluminum-silicon alloy has good ductility, and the silicon content exceeds the aluminum-silicon eutectic After the point (11.7% silicon), the silicon particles in the alloy increase significantly, and the hardness and wear resistance of the alloy also increase significantly. The existing method is to retain the silicon in the matrix by electrochemically treating the aluminum-silicon alloy to erode the surface aluminum , in order to further improve its wear resistance and hardness, but this method has the problems of complicated operation and difficult control of processing quality....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06C22F1/043
CPCC22C1/026C22C1/06C22C21/003C22C21/02C22F1/043
Inventor 董学民
Owner 浙江大侠铝业有限公司
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