Semi-solid squeezing casting method and system for aluminum alloy
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A semi-solid extrusion and aluminum alloy technology, applied in the field of aluminum alloy semi-solid extrusion casting, can solve the problems of reducing the cost of semi-solid slurry preparation, slurry transfer, etc.
Active Publication Date: 2016-11-09
ZHONGBEI UNIV
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Problems solved by technology
The present invention proposes a simple semi-solid slurry preparation method and system, which also realizes automatic pouring and quantitative pourin
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Embodiment 1
[0049] The aluminum alloy semi-solid extrusion casting method provided by the present invention is used to prepare aluminum alloy semi-solid extrusion castings. The chemical materials used in this embodiment are: aluminum alloy, zinc oxide, water glass, aluminum foil, acetone, deionized water, and argon; the preparation amount is as follows (in grams, milliliters, centimeters) 3 Is the unit of measurement):
[0050]
[0051] The specific preparation method is as follows:
[0052] (1) Preparation of extrusion die
[0053] The extrusion die is rectangular, the material is stainless steel, the die cavity size is 120mm×30mm×50mm, and the cavity surface roughness is Ra0.08-0.16μm.
[0054] (2) Preparation of coating agent and coating extrusion die
[0055] Weigh 50g±1g of zinc oxide, 10g±1g of water glass, measure 500mL±5mL of deionized water, add it to the mixer for stirring, stirring speed 50r / min, stirring time 80min; after stirring, it becomes a milky white suspension liquid, Namely co...
Embodiment 2
[0079] This embodiment provides a system for semi-solid squeeze casting of aluminum alloy, such as figure 1 As shown, the system can be applied to the above aluminum alloy semi-solid extrusion casting method for preparing aluminum alloy semi-solid extrusion castings, and the system includes:
[0080] The aluminum alloy semi-solid slurry preparation device includes a gate 13 and a heat preservation device 17; wherein: the gate 13 is set at the entrance of the heat preservation device 17 and communicates with the inside of the heat preservation device 17, for receiving the aluminum alloy obtained by smelting and preliminary preparation Aluminum alloy semi-solid slurry; the heat preservation device 17 is used to receive and heat the aluminum alloy semi-solid slurry obtained by preliminary preparation through the gate 13 to form a homogeneous aluminum alloy semi-solid slurry;
[0081] The extrusion molding device includes a heat-preserving extrusion die (2, 21) for extruding the aluminu...
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Abstract
The invention relates to a semi-solid squeezing casting method and system for aluminum alloy and belongs to the technical field of preparation and application of nonferrous materials. The method comprises the following steps that firstly, an aluminum alloy block is cut into aluminum alloy pieces, the aluminum alloy pieces are wrapped with aluminum foil correspondingly, and then the wrapped aluminum alloy pieces are preheated; the preheated aluminum alloy pieces are smelted, so that molten aluminum alloy is obtained; the molten aluminum alloy is poured into a heat preservation device for heat preservation via a sprue with a bent channel or an inverted conical channel, and semi-solid aluminum alloy slurry is obtained; the semi-solid aluminum alloy slurry is poured into a heat preservation squeezing mold to be subjected to squeezing molding treatment; and finally, pressure application continues after the squeezing molding treatment is completed, then a casting is jacked out and subjected to air cooling, and an semi-solid aluminum alloy squeezed casting is obtained. According to the preparation method, the advanced process is achieved, procedures are precise, data are accurate and full, and after heat treatment of the prepared semi-solid aluminum alloy squeezed casting, the hardness of the casting can be up to 82.9 HB and the tensile strength of the casting can be up to 279 Mpa.
Description
Technical field [0001] The invention relates to a method and system for semi-solid squeeze casting of aluminum alloy, and belongs to the technical field of preparation and application of non-ferrous metal materials. Background technique [0002] Aluminum alloy is a non-ferrous alloy with good strength, toughness, electrical conductivity and thermal conductivity. It is often used as a structural material and has been widely used in the fields of aerospace, electronics, and automobile manufacturing; but aluminum alloy has low tensile strength and hardness Low and poor corrosion resistance limit its application in industry. [0003] The currently widely used aluminum alloy forming method is pressure casting. However, die castings are prone to defects such as oxidation and pores, which leads to a decrease in the mechanical properties of the castings. The semi-solid squeeze casting method is a near net shape method, which has the advantages of low processing temperature, heat treatmen...
Claims
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