Extrusion casting method for aluminum alloy automobile speed changing box shell

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: 2012-02-29
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, s

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 percent 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, and when the temperature rises to 310°C, add aluminum ingots and intermediate alloys into the centralized melting furnace, and when the temperature continues to rise to 755°C, first add 2.8% of the amount of molten aluminum to the bottom of the hanging bag 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 a...

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Abstract

The invention discloses an extrusion casting method for an aluminum alloy automobile speed changing box shell. The method comprises the following steps of: preparing materials, smelting, preparing a die, performing extrusion casting and performing heat treatment. In the extrusion casting process, the manufactured aluminum alloy automobile speed changing box shell has higher tensile strength and yield strength and hardness by optimizing the design of aluminum alloy ingredients, process parameters of smelting and extrusion casting and a heat treatment system. By the extrusion casting method, the accuracy of blanks can be improved, machining allowance can be reduced, low consumption of resources and energy is realized, and the economic benefit is improved.

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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IPC IPC(8): B22D18/02C22C21/04C22C1/02C22F1/043F16H57/02
Inventor 陈伟军
Owner JIANGSU HIDA MARINE VALVE
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