Preparation method, heat treatment method and die-casting method of high-strength and toughness die-casting aluminum alloy material
A technology of casting aluminum alloy and tough pressing, which is applied in the field of die-casting aluminum alloy, can solve the problems of reducing production efficiency, increasing the working time of heat treatment process, increasing the cost of heat treatment, etc., and achieving the effect of good tensile strength
Active Publication Date: 2022-03-08
GUANGZHOU ZHIYUAN ALLOY PROD CO LTD
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At the same time, it is necessary to invest in heat treatment equipment, which increases the process operation time of heat treatment, reduces production efficiency, and increases the cost of heat treatment
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[0028] An embodiment of the present invention provides a method for preparing a high-strength and toughness die-casting aluminum alloy material, comprising the following steps:
[0029] (1) After adding 85%-90% of aluminum ingots and all silicon, melt and heat up to 830°C-860°C.
[0030] (2) When the temperature is 830°C-860°C and the silicon has been melted evenly, add manganese additives and titanium additives, stir and melt, and leave it for 10-20 minutes.
[0031] (3) Sampling and inspecting the composition, by weight percentage, to ensure that the calculation of the composition falls within the following range including the required materials added later: Si: 1.6%-2.8%; Mn: 0.4%-0.9%; Ti: 0.1% -0.3%.
[0032] (4) Add the remaining 10-15% aluminum ingot to melt it and remove the slag.
[0033] (5) Add preheated magnesium when the temperature is 740°C-760°C, press it into the molten pool, make it melt in the molten aluminum, and control Mg / Si≥2.5; stir after melting, and ...
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Abstract
The invention provides a preparation method, a heat treatment method and a die-casting method of a high-strength and tough die-casting aluminum alloy material with good tensile strength, yield strength and elongation. The preparation method of the high-strength and toughness die-casting aluminum alloy material provided by the present invention comprises the following steps: adding part of aluminum ingots and silicon; adding manganese additives and titanium additives; adding the remaining aluminum ingots to melt them; adding preheated magnesium, and controlling Mg / Si≥2.5; add preheated aluminum beryllium master alloy; add sodium-free refining agent for refining; add preheated aluminum titanium carbon boron seed crystal material; sampling and inspection composition, by weight percentage, to ensure that the composition is in the following range Inside: Mg: 4%‑7%; Si: 1.6%‑2.8%; Mn: 0.4%‑0.9%; Ti: 0.1%‑0.3%; Be: 0.002%‑0.010%; 0.3%-2%, Fe: ≤0.2%, Mg / Si≥2.5; after the composition is qualified, the temperature is 690℃-740℃ for casting.
Description
technical field [0001] The invention belongs to the technical field of die-casting aluminum alloys, and in particular relates to a preparation method, a heat treatment method and a die-casting method of a high-strength and toughness die-casting aluminum alloy material. Background technique [0002] With the continuous improvement of the performance requirements of aluminum alloy structural parts, especially with the advancement of replacing steel with aluminum to realize the lightweight of automobiles, higher requirements are put forward for the performance of aluminum alloy die castings in terms of achieving high strength and high toughness at the same time . In response to this demand, in recent years, Al-Si-Mg series die-casting aluminum alloy materials have been mainly developed and upgraded. For example, AlSi10MnMg is a relatively representative high-strength and tough die-casting aluminum alloy material. It mainly realizes different performances by adjusting and contr...
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IPC IPC(8): C22C1/03C22C21/08C22C1/06C22F1/047B22D17/00
Inventor 李新豪陈苏坚李升李旭涛王永科
Owner GUANGZHOU ZHIYUAN ALLOY PROD CO LTD