Homogenizing method for improving electrical conductivity of aluminum alloy cast ingot and aluminum alloy cast ingot prepared through homogenizing method
An aluminum alloy ingot, electrical conductivity technology, applied in the field of aluminum alloy casting, can solve the problems of low strength, low electrical conductivity, unable to meet design requirements, etc., and achieve the effect of increasing the cooling rate
Active Publication Date: 2019-08-27
苏州铭恒金属材料科技有限公司
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Problems solved by technology
Al-Si-Mg alloy is a cast alloy strengthened by hypoeutectic heat treatment. Although it has high strength and excellent casting performance, it has low electrical conductivity and low strength in actual production, which cannot meet the design requirements, especially for target materials. The conductive parts of the base have low conductivity, and most of them are imported from abroad with high conductivity 6-series aluminum alloys
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[0021] The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.
[0022] Aluminum alloy ingots need to be homogenized after casting. Homogenization is also called homogenization annealing. Homogenization is to heat the aluminum alloy ingots to the temperature close to the unbalanced solidus line for a long time, and then cool them by water cooling. Slow cooling down to room temperature. figure 1 It is the electron microscope scanning picture under 500X after the aluminum alloy ingot is homogenized. from figure 1 It can be seen that the structure of the existing ingot after homogenization treatment is characterized by criss-cross short rod-shaped precipitates inside the grains. This is due to the slow cooling rate after homogenization, which leads to the precipitation and growth of pre...
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Abstract
The invention provides a homogenizing method for improving electrical conductivity of an aluminum alloy cast ingot. The homogenizing method comprises the following steps that firstly, homogenizing treatment is conducted, the aluminum alloy cast ingot obtained after casting is subjected to temperature rise to the heat preservation temperature ranging from 500 DEG C to 600 DEG C, and heat preservation is conducted for 10-20 h; secondly, furnace discharging is conducted, and the aluminum alloy cast ingot is stably pulled out of a furnace; thirdly, cooling is conducted, after strong wind cooling is conducted for 0.5-2 h, water mist cooling and strong wind cooling are conducted, and the cooling speed is higher than 200 DEG C / h; and fourthly, unloading is conducted. The invention further provides the aluminum alloy cast ingot prepared through the homogenizing method for improving electrical conductivity of the aluminum alloy cast ingot. According to the homogenizing method, the cooling manner is changed, original water cooling is changed into wind cooling and water mist cooling, the cooling speed during homogenizing is increased, and the electrical conductivity of the aluminum alloy castingot obtained through the homogenizing method exceeds 30 Ms / m.
Description
technical field [0001] The invention relates to the technical field of aluminum alloy casting, in particular to a homogeneous method for improving the electrical conductivity of an aluminum alloy ingot and an aluminum alloy ingot produced by the homogeneous method. Background technique [0002] Aluminum alloy ingots need to be homogenized after casting. Homogenization is also called homogenization annealing. Homogenization is to heat the aluminum alloy ingots to the temperature close to the unbalanced solidus line for a long time, and then cool them by water cooling. The process of slow cooling to room temperature, the purpose is to eliminate or reduce the inhomogeneity of chemical composition and structure in the grain through the diffusion of alloy element atoms, thereby improving the internal structure of the ingot, eliminating the residual stress of the ingot, and improving the machining of the ingot performance, while improving plasticity and reducing deformation resist...
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IPC IPC(8): C22F1/05
CPCC22F1/05
Inventor 于昊川
Owner 苏州铭恒金属材料科技有限公司