Improved die casting forming method

A molding method and die casting technology, which is applied in the field of alloy die casting, can solve the problems of low tensile strength, low casting hardness, low elongation, etc., so as to prolong the service life, reduce the machining allowance, and improve the elongation strength and tensile strength Effect

Active Publication Date: 2020-09-18
GUANGDONG HONGTEO ACCURATE TECH (TAISHAN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the castings produced by low-pressure casting have low hardness, poor compactness, low tensile strength and low elongation, which are also obvious shortcomings of low-pressure casting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An improved die casting molding method, comprising the following steps:

[0028] S1. Melting: Put the aluminum alloy material into the heating furnace and continue heating to 730°C to obtain a melt; then use compressed argon or compressed nitrogen as a carrier to evenly add strengthening particles to the melt, remove the slag and let it stand to obtain the first a melt.

[0029] The reinforcing particles are nanoscale TiC or nanoscale SiC particles, and the added amount is 0.5% of the weight of the melt. While adding strengthening particles, the melt is ultrasonically vibrated to improve uniformity.

[0030] The raw materials of the aluminum alloy in this embodiment are: Mg: 0.3%, Si: 0.3%, Fe: 0.2%, Cu: 0.45-0.6%, Mn: 0.05%, Cr: 0.04%, Zn: 0.2%, Ti: 0.03%, Al: balance.

[0031] S2. Stirring: Stir the first melt by means of electromagnetic stirring, and gradually lower the temperature to obtain an ingot.

[0032] S3. Remelting material: cutting the cast ingot into b...

Embodiment 2

[0039] An improved die-casting forming method is basically the same as in Example 1, except that the raw materials of the aluminum alloy and the specific parameters of the process are different, as follows:

[0040] S1. Melting: Put the aluminum alloy material into the heating furnace and heat it continuously to 760°C to obtain a melt; then use compressed argon or compressed nitrogen as a carrier to evenly add strengthening particles to the melt, remove the slag and let it stand to obtain the first a melt.

[0041] The reinforcing particles are nano-sized TiC particles, and the added amount is 2% of the weight of the melt. While adding strengthening particles, the melt is ultrasonically vibrated to improve uniformity.

[0042] The raw materials of the aluminum alloy in this embodiment are: Mg: 0.5%, Si: 0.6%, Fe: 0.5%, Cu: 0.5%, Mn: 0.08%, Cr: 0.2%, Zn: 0.4%, Ti: 0.2%, Al: balance.

[0043] S2. Stirring: Stir the first melt by means of electromagnetic stirring, and graduall...

Embodiment 3

[0051] An improved die-casting molding method is basically the same as Example 1, except that the raw materials of the aluminum alloy and the specific process parameters are different, as follows:

[0052] S1. Smelting: put the aluminum alloy material into a heating furnace and continue to heat it to 820°C to obtain a melt; then use compressed argon or compressed nitrogen as a carrier, evenly add strengthening particles to the melt, remove the slag and let it stand to obtain the first a melt.

[0053] The reinforcing particles are nano-sized SiC particles, and the addition amount is 3% by weight of the melt. While adding reinforcing particles, the melt is ultrasonically vibrated to improve uniformity.

[0054] The raw materials of the aluminum alloy in this embodiment are: Mg: 0.7%, Si: 0.8%, Fe: 0.8%, Cu: 0.6%, Mn: 0.1%, Cr: 0.35%, Zn: 0.6%, Ti: 0.3%, Al: balance.

[0055] S2, stirring: stirring the first melt by means of electromagnetic stirring, and gradually cooling and...

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PUM

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Abstract

The invention provides an improved die casting forming method. The improved die casting forming method comprises the following steps that S1, smelting is conducted, wherein an aluminum alloy materialis put into a heating furnace to be continuously heated to obtain molten liquid, then compressed argon or compressed nitrogen serves as a carrier, strengthening particles are evenly added into the molten liquid, slag is removed, and standing is conducted to obtain a first melt; S2, stirring is conducted, wherein the first melt is stirred electromagnetically to obtain a cast ingot; S3, smelting isconducted again, wherein the cast ingot is cut into blanks and re-heated to obtain a second melt; S4, mold treatment is conducted, wherein a mold is preheated and subjected to heat preservation for 1h; S5, die casting is conducted, wherein the second melt is transferred into a holding furnace of a low-pressure casting machine for heat preservation, then the second melt is die-cast into a mold cavity under the low-pressure condition, and a die casting is obtained; and S6, heat treatment is conducted, wherein the obtained die casting is subjected to a heat treatment process including solution treatment and incomplete artificial aging. An aluminum alloy product obtained through the method is compact in structure, good in comprehensive mechanical property and physicochemical property, high inmaterial utilization rate and low in cost.

Description

technical field [0001] The invention relates to the technical field of alloy die casting, in particular to an improved die casting forming method. Background technique [0002] Aluminum and its alloys are favored because of their excellent mechanical properties, corrosion resistance, and formability. Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. . In recent years, aluminum alloys have been used more and more in industries such as automobiles, ships, and home appliances. With the upgrading of product manufacturing and the improvement of end product performance requirements, all walks of life have put forward higher requirements for the performance of aluminum alloys. Not only the casting s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/14C22C21/16C22C21/18C22C21/02C22C21/00C22C1/03C22C1/02C22F1/04C22F1/043C22F1/057B22D18/04
CPCB22D18/04C22C1/026C22C1/03C22C21/00C22C21/02C22C21/14C22C21/16C22C21/18C22F1/002C22F1/04C22F1/043C22F1/057
Inventor 张金荣苏华安
Owner GUANGDONG HONGTEO ACCURATE TECH (TAISHAN) CO LTD
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