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A kind of A356.2 aluminum alloy casting method

A technology of aluminum alloy and aluminum alloy melt, which is applied in the field of metallurgy, can solve the problems of slow crystallization rate, lower temperature gradient, and low cooling intensity, and achieve the effects of improved grain size, small dendrite spacing, and uniform grains

Active Publication Date: 2017-02-01
隆达铝业(烟台)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the base temperature of the mold is high, relatively speaking, the cooling intensity is low. Although the mold wall is still crystallized first, compared with the low-temperature mold, the heat output per unit time is less, the temperature gradient decreases, and the degree of supercooling decreases accordingly. The crystallization rate slows down, therefore, the coarser grain

Method used

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  • A kind of A356.2 aluminum alloy casting method
  • A kind of A356.2 aluminum alloy casting method
  • A kind of A356.2 aluminum alloy casting method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Existing A356.2 aluminum alloy casting method, its steps are:

[0033] ⑴ Feed the raw materials required for A356.2 aluminum alloy according to the standard requirements, then smelt, and then undergo purification treatment, and detect the content of each alloy element and adjust it to meet the standard requirements. At this time, the strontium content in the melt accounts for About 0.021% of the total amount, the temperature of the melt remains at 690°C.

[0034] (2) Cast the above-mentioned aluminum melt according to the traditional casting method. According to the weight of the aluminum alloy melt, the casting time is between 1 and 2 hours, and the cast aluminum alloy ingot is cooled by a fan.

[0035] Samples of aluminum alloy ingots were taken from before, during and after casting, and tested by low-magnification grain size, the results are as follows Figure 1a ~ Figure 1c shown.

[0036] It can be seen from observation that after the addition of Al-Sr master all...

Embodiment 2

[0038] A356.2 aluminum alloy casting method provided by the invention, its steps are:

[0039] ⑴The raw materials required for A356.2 aluminum alloy are fed according to the standard ratio, and the input raw materials do not include strontium-containing raw materials, and then smelted, and then cast after purification treatment. During the casting process, the A356.2 aluminum alloy melt Al-Sr master alloy is added in, and the way of adding is that the Al-Sr master alloy is divided into a plurality of equal parts, and added to the aluminum alloy melt according to the number of parts; in the present embodiment, the Al-Sr master alloy is Aluminum-based master alloy containing 10% Sr, each 3Kg, added 7 times in total.

[0040]The method of adding equal parts at intervals solves the problem of Al-Sr failure, effectively ensuring that the grain size remains small and uniform throughout the casting process. Artificial seeding is a measure to increase non-spontaneous crystal nuclei. ...

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Abstract

The invention relates to an A356.2 aluminum alloy casting method. The method includes the steps that 1, raw material required by A356.2 aluminum alloy is fed according to the standard requirement proportion, the fed raw material does not contain the raw material containing strontium, then smelting is conducted, casting is conducted after purifying is conducted, in the casting process, and Al-Sr intermediate alloy is added to A356.2 aluminum alloy melt; according to the feeding mode, the required Al-Sr intermediate alloy is equally divided into multiple parts and is added to the aluminum alloy melt in different time frames according to the divided parts; 2, in the casting process, at a joint where aluminum alloy ingots in a die are converted into solid from liquid, cooling water mist is sprayed to the die from the bottom of the die, and the cooling water mist spraying range is extended backwards by 4-5 m from the starting point.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to wheel manufacturing, in particular to an A356.2 aluminum alloy casting method. Background technique [0002] With the rapid development of the automobile industry, the application range of aluminum alloy in the automobile manufacturing industry is becoming more and more extensive. As an important part of the automobile, the quality of the material of the automobile wheel hub directly affects the performance and driving safety of the automobile. A356.2 aluminum alloy is used as Automobile wheel hub materials have been used for many years and still occupy the leading position in the market of aluminum alloy hub materials. However, with the continuous emergence of new materials, the market competitiveness of A356.2 aluminum alloy materials is gradually weakening. Therefore, if you want to maintain A356.2 The market position of aluminum alloy will not be shaken, and the performance of the allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/04B22D21/04
Inventor 臧立根臧立国张建斌蔡振斌杨明娟杨海军刘志国陈敬超李海军徐慧丽王宏峰
Owner 隆达铝业(烟台)有限公司
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