Thermal treatment method of die-casting aluminum alloy and die-casting aluminum alloy material

A heat treatment method and casting aluminum alloy technology, which is applied in the field of die-casting aluminum alloy materials and heat treatment of die-casting aluminum alloys, can solve problems such as high-temperature deformation of die-casting parts, uncontrolled gas content, and entrainment of castings, so as to avoid high-temperature deformation, Effects in simple steps

Inactive Publication Date: 2018-03-23
GUANGZHOU ZHIYUAN ALLOY PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary high-speed die-casting will inevitably cause certain air entrainment to the casting
Using T6 solid solution treatment at a higher temperature, if the gas content of the casting itself is not controlled, resulting in concentrated gas distribution or larger pores, which will cause foaming after T6 heat treatment of die castings
Also for thinner castings, T6 treatment is also likely to cause high temperature deformation of die castings
At the same time, the process of T6 heat treatment is more complicated and the cost is higher

Method used

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  • Thermal treatment method of die-casting aluminum alloy and die-casting aluminum alloy material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw material ratio

[0035] Calculated by weight percentage: silicon, content 8.05%; iron, content 0.319%; copper, content 0.527%; manganese, content 0.0824%; magnesium, content 1.062%, zinc 0.157% content; titanium, content 0.186%; tin, the content is ≤0.00055%; lead, the content is ≤0.0003%; cadmium, the content is ≤0.0021%; the balance is aluminum.

[0036] Preparation Process

[0037] (1) Put 90% of the total amount of silicon and aluminum ingots into the melting furnace, and then heat up.

[0038] (2) After heating and making it completely melted, stir more than 3 times. The stirring is helpful for the alloying and homogenization of the material, and the stirring is not less than 5 minutes each time. The stirring head is made of graphite material, and low-speed mechanical stirring is carried out.

[0039] (3) After the temperature reaches 830-850° C., add titanium element additives, iron element additives and copper element additives, and stir again to homogeniz...

Embodiment 2

[0048] Raw material ratio

[0049] Calculated by weight percentage: silicon, content 7.98%; iron, content 0.321%; copper, content 0.606%; manganese, content 0.0828%; magnesium, content 1.123%, zinc, content 0.156%; titanium, content 0.187%; tin, the content is ≤0.00013%; lead, the content is ≤0.0003%; cadmium, the content is ≤0.0021%; the balance is aluminum.

[0050] Preparation Process

[0051] (1) Put 90% of the total amount of silicon and aluminum ingots into the melting furnace, and then heat up.

[0052] (2) After heating and making it completely melted, stir more than 3 times. The stirring is helpful for the alloying and homogenization of the material, and the stirring is not less than 5 minutes each time. The stirring head is made of graphite material, and low-speed mechanical stirring is carried out.

[0053] (3) After the temperature reaches 830-850° C., add titanium element additives, iron element additives and copper element additives, and stir again to homogeni...

Embodiment 3

[0062] The Japanese ADC12 is heat treated. The heat treatment process is as follows: place the ADC12 aluminum alloy die casting in a heat treatment furnace, start from 25°C at a near-uniform heating rate of about 8°C / min, heat it up to 160°C and keep it warm. Continue for 420 minutes, then remove the sample and air cool. A heat-treated die-cast aluminum alloy is obtained. The main chemical composition standards of ADC12 are: copper (Cu) 1.5-3.5, silicon (Si) 9.6-12.0, magnesium (Mg) ≤ 0.3, zinc (Zn) ≤ 1.0, iron (Fe) ≤ 1.3, manganese (Mn) ≤ 0.5, tin (Sn) ≤ 0.3, lead (Pb) ≤ 0.1, cadmium (Cd) ≤ 0.005, and the balance is aluminum (Al).

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Abstract

The invention provides a thermal treatment method of a die-casting aluminum alloy and a die-casting aluminum alloy material. The thermal treatment method of a die-casting aluminum alloy comprises thefollowing steps: placing a die casting into a thermal treatment furnace, warming up at uniform speed to 150-170 DEG C from 20-30 DEG C, carrying out thermal insulation for 300-500 min, taking out thesample, and air cooling. The thermal treatment method of a die-casting aluminum alloy has simple steps and can avoid foaming and high-temperature deformation after thermal treatment of die castings.

Description

technical field [0001] The invention belongs to the field of heat treatment of aluminum alloy materials, and in particular relates to a heat treatment method of die-casting aluminum alloys and die-casting aluminum alloy materials. Background technique [0002] The purpose of heat treatment of aluminum alloy castings is to improve mechanical properties and corrosion resistance, stabilize dimensions, and improve processing properties such as cutting and welding. Because the mechanical properties of many cast aluminum alloys cannot meet the requirements of use, except for Al-Si-based ZL102, Al-Mg-based ZL302 and Al-Zn-based ZL401 alloys, the rest of the cast aluminum alloys must be further improved by heat treatment. The mechanical properties and other performance of the castings are specifically as follows: 1) Eliminate the castings caused by uneven cooling rates during crystallization and solidification due to the structure of the castings (such as uneven wall thickness, thic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043
CPCC22C21/02C22F1/043
Inventor 李新豪陈苏坚李升李旭涛陈定贤
Owner GUANGZHOU ZHIYUAN ALLOY PROD CO LTD
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