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A kind of extrusion casting method of aluminum alloy automobile transmission case

An automobile gearbox and squeeze casting technology, applied in the field of casting and squeeze casting, can solve the problems of low utilization rate of aluminum scrap, low utilization rate of resources and energy, hindering the rapid development of automobiles, etc. The effect of optimizing the heat treatment system and reducing the machining allowance

Active Publication Date: 2016-06-22
JIANGSU HIDA MARINE VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production and manufacturing methods of aluminum castings for aluminum alloy gearbox casings for automobiles in my country present the following forms: sand casting, gravity casting, low pressure casting and pressure casting; aluminum alloy gearbox casings for automobiles manufactured by these traditional processes The body presents different degrees of quality problems such as cold shut, sag, and cracks on the outside, and fatal defects such as air holes, shrinkage cavities, and pinholes often appear on the inside, which seriously affects the performance of the product.
At the same time, due to the low yield rate, low resource and energy utilization rate, low recycling rate of aluminum waste, serious environmental pollution and other defects, the rapid development of automobiles has been hindered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Ingredients: The weight percent of aluminum alloy material components is: 5.0% Si, 2.5% Ti, 0.25-0.35% Cu, 0.5% Zn, 1.45% Mg, Fe<0.1%, Ni<0.05%, Pb<0.05% , Sn<0.05%, the rest is Al.

[0021] 2) Melting: Heat up the melting furnace. When the temperature rises to 300°C, add aluminum ingots and intermediate alloys into the concentrated melting furnace. When the temperature continues to rise to 760°C, add 2.5% of the molten aluminum to the bottom of the hanging bag first. After the aluminum alloy is completely dissolved, transfer it to the hanging bag and stir for 15 minutes; add a grain refiner with an amount of 1.5% of the aluminum liquid. Refining the alloy for 30 minutes until no bubbles emerge from the liquid surface. After standing for 10 minutes, add a slag remover with an amount of 0.3% of the aluminum liquid. After removing the surface scum, cool down to 700°C and prepare for pouring ;

[0022] 3) Prepare the mould: The casting mold of the automobile gearbox c...

Embodiment 2

[0027] 1) Ingredients: The weight percentage of aluminum alloy material components is: 6.0% Si, 1.5% Ti, 0.35% Cu, 0.5% Zn, 1.45% Mg, Fe<0.1%, Ni<0.05%, Pb<0.05%, Sn <0.05%, the rest is Al.

[0028] 2) Melting: Heat up the melting furnace. When the temperature rises to 300°C, add aluminum ingots and intermediate alloys into the concentrated melting furnace. When the temperature continues to rise to 760°C, add 2.5% of the molten aluminum to the bottom of the hanging bag first. After the aluminum alloy is completely dissolved, transfer it to the hanging bag and stir for 15 minutes; add a grain refiner with an amount of 1.5% of the aluminum liquid. Refining the alloy for 30 minutes until no bubbles emerge from the liquid surface. After standing for 10 minutes, add a slag remover with an amount of 0.3% of the aluminum liquid. After removing the scum on the surface, cool down to 710°C and prepare for pouring .

[0029] 3) Prepare the mould: The casting mold of the automobile gear...

Embodiment 3

[0034] 1) Ingredients: The weight percentage of aluminum alloy material components is: 5.5% Si, 2.0% Ti, 0.3% Cu, 0.8% Zn, 1.35% Mg, Fe<0.1%, Ni<0.05%, Pb<0.05%, Sn <0.05%, the rest is Al.

[0035]2) Melting: Heat up the melting furnace. When the temperature rises to 310°C, add aluminum ingots and intermediate alloys into the centralized melting furnace. When the temperature continues to rise to 755°C, add 2.8% of the molten aluminum to the bottom of the hanging bag first. After the aluminum alloy is completely dissolved, transfer it to a hanging bag and stir for 12 minutes; add a grain refiner with an amount of 1.8% of the aluminum liquid. Refining the alloy for 25 minutes until no bubbles emerge from the liquid surface. After standing still for 20 minutes, add a slag remover with an amount of 0.2% of the aluminum liquid. After removing the scum on the surface, cool down to 705°C and prepare for pouring .

[0036] 3) Prepare the mould: The casting mold of the automobile gea...

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Abstract

The invention discloses a squeeze casting method for an aluminum alloy automobile gearbox housing. The method comprises five steps of batching, smelting, mold preparation, squeeze casting and heat treatment. The invention adopts the squeeze casting process, optimizes the design of aluminum alloy components, optimizes the process parameters of smelting and squeeze casting and the heat treatment system, so that the manufactured aluminum alloy gearbox casing for automobiles has higher tensile strength and is more durable. High yield strength and hardness. The method can improve the precision of the blank, reduce the machining allowance, realize low consumption of resources and energy, and promote the improvement of economic benefits.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of squeeze casting. Background technique [0002] In the fierce competition in the world automobile market, all countries are developing in the direction of high quality, high reliability, light weight, energy saving and low cost. In terms of materials, it is lightweight, replacing some steel (iron) parts with aluminum alloys, in order to meet the requirements of high-quality, low-cost development of automobiles; in terms of technology, it is scientific, using advanced technology to replace traditional technology to achieve The purpose of improving blank precision, reducing machining allowance, reducing raw material consumption, and reducing cost. To further expand the application of aluminum alloy materials in automobile structures and powertrain systems, the existing preparation methods and manufacturing processes of aluminum alloy castings have been difficult to meet this req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/02C22C21/04C22C1/02C22F1/043F16H57/02
Inventor 陈伟军
Owner JIANGSU HIDA MARINE VALVE
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