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Preparation method of high-strength heat-resistant aluminum alloy profile

A high-strength technology for aluminum alloy profiles, applied in the field of aluminum alloy material processing, can solve the problems of poor thermal stability and low strength of aluminum-silicon alloys, and achieve the effects of good thermal stability, excellent wear resistance, and high high-temperature strength

Inactive Publication Date: 2014-04-09
WUHU WANRUN MACHINERY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of low strength and poor thermal stability of existing aluminum-silicon alloys at high temperatures, the present invention provides a method for preparing high-strength heat-resistant aluminum alloy profiles that can be used for a long time at 250-300°C

Method used

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Embodiment Construction

[0014] A method for preparing a high-strength heat-resistant aluminum alloy profile, characterized in that it comprises the following steps:

[0015] (1) Meet the following requirements according to the mass percentage of elements: Si 11.8-12.4, Cu 1.5-2.5, Cr 1.1-2.2, Mg 0.6-1.3, Mn 0.5-1.0, Ni 0.4-0.8, Ti 0.3-0.6, Be 0.2-0.4 , Zr 0.15-0.35, Cd 0.05-0.15, Mo 0.1-0.2, W 0.05-0.1, La 0.04-0.08, Ce 0.03-0.05, Yb 0.02-0.03, the balance is Al for batching, put the charge into the melting furnace at 755 Melt at ℃, add until all the charge is melted, stir for 25 minutes, check the alloy composition and adjust; then add refining agent for refining, the refining temperature is 730 ℃, the refining time is 20 minutes, stand still for 20 minutes after removing slag, and then adjust the temperature to 745 ℃, 80% N in molten aluminum 2 +20%Cl 2 Multi-component mixed gas degassing and refining for 20 minutes, the gas pressure is 0.18 atm, and the gas flow rate is 1.6 m 3 / min, st...

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Abstract

The invention discloses a preparation method of a high-strength heat-resistant aluminum alloy profile. The aluminum alloy profile comprises the following elements in percentage by mass: 11.8-12.4% of Si, 1.5-2.5% of Cu, 1.1-2.2% of Cr, 0.6-1.3% of Mg, 0.5-1.0% of Mn, 0.4-0.8% of Ni, 0.3-0.6% of Ti, 0.2-0.4% of Be, 0.15-0.35% of Zr, 0.05-0.15% of Cd, 0.1-0.2% of W, 0.05-0.1% of Mo, 0.04-0.08% of La, 0.03-0.05% of Ce, 0.02-0.03% of Yb and the balance of Al. The aluminum alloy profile has the advantages of high heat stability, high high-temperature strength, excellent wear resistance, excellent corrosion resistance, excellent fatigue resistance, low production cost and the like, can be used at 250-300 DEG C for a long time, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing a high-strength heat-resistant aluminum alloy profile, belonging to the technical field of aluminum alloy material processing. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. Because of its low density and relatively high strength, which is close to or exceeds high-quality steel, it has good plasticity, excellent electrical conductivity, thermal conductivity, and corrosion resistance. Processed into various profiles, widely used in machinery manufacturing, transportation machinery, power machinery and aviation industry, etc. The application temperature range of existing aluminum-silicon alloys does not exceed 250°C. Due to the poor high-temperature stability of ordinary aluminum-silicon alloys, most of the aluminum-silicon alloys become unstable when the reinforcement phase is higher than 250°C, and quickly soften and diss...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/06C22F1/043
Inventor 吴贤春
Owner WUHU WANRUN MACHINERY
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