Pressure casting method for auto spare parts

An auto parts and pressure technology, applied in the field of metal die-casting, can solve the problems of easy storage of pores and poor mechanical properties of die-casting, and achieve the effects of reducing the defect rate of pores, improving the elongation and improving the product qualification rate.

Active Publication Date: 2015-05-20
中山普瑞科精密压铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem solved by the present invention is to provide a die-casting method for auto parts to solve the problems of poor die-casting mechanical properties of existing aluminum alloy parts and easy storage of pores in the structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A die-casting method for auto parts, which uses an aluminum alloy, the aluminum alloy is made of raw materials in the following weight ratio: Si: 0.06%; Cu4.6%; Mg: .05%; Zn: 0.25%; Mn: 0.3 %; Ti: 0.15%; Zr: 0.05%; Cd: 0.25%; Sc: 0.25%; the balance Al;

[0023] Include the following steps:

[0024] A. Modification treatment: melt the raw materials and raise the temperature to 750℃~800℃% for modification treatment, and let stand for 2 hours;

[0025] B. Melting: Raise the temperature of the modified raw materials to 650℃~700℃% to become liquid raw materials;

[0026] C. Mold closing: until there is a gap of 20 mm on the parting surface of the mold, stop the mold closing;

[0027] D. Inject oxygen with a pressure of 0.4 Mpa into the gap;

[0028] E. Continue to close the mold, and the mold is completely closed;

[0029] F. Inject liquid raw materials into the barrel;

[0030] G. After injecting liquid raw materials, inject oxygen into the barrel with a pressure of 0....

Embodiment 2

[0035] A die-casting method for auto parts, which uses an aluminum alloy, the aluminum alloy is made of raw materials with the following weight ratio: Si: 0.05%; Cu: 5%; Mg: 0.03%; Zn: 0.2%; Mn: 0.5% ;Ti: 0.35%; Zr: 0.2%; Cd: 0.2%; Sc: 0.45%; balance Al;

[0036] Include the following steps:

[0037] A. Modification treatment: melt the raw materials and raise the temperature to 750°C-800°C% for deterioration treatment, and let stand for 2 hours to 4 hours;

[0038] B. Melting: Raise the temperature of the modified raw materials to 650℃~700℃% to become liquid raw materials;

[0039] C. Mold clamping: Stop mold clamping until there is a gap of 30 mm on the parting surface of the mold;

[0040] D. Inject oxygen with a pressure of 0.6 Mpa into the gap;

[0041] E. Continue to close the mold, and the mold is completely closed;

[0042] F. Inject liquid raw materials into the barrel;

[0043] G. After injecting liquid raw materials, inject oxygen into the barrel with a pressure...

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Abstract

The invention discloses a pressure casting method for auto spare parts, and relates to the technical field of metal pressure casting which uses an aluminum alloy. The pressure casting method for the auto spare parts includes the following steps that 1 modification treatment: raw materials are melt, the modification treatment is conducted at a temperature which is increased to 750 DEG C to 800 DEG C, and the standing of the raw materials is stayed for 2-4 hours; 2 smelting: the modified raw materials are conducted to be liquid raw materials at a temperature which is increased to 650 DEG C to 800 DEG C; 3 die compounding: die assembly is conducted until a gap ranging from 20 mm to 30 mm occurs in a die joint face; 4 oxygen gas is injected into the gap; 5 the die assembly is conducted continuously until the dies are closed completely; 6 the liquid raw materials are injected into a charging barrel; 7 after the liquid raw materials is injected, the oxygen gas is injected into the charging barrel; 8 pressure casting is conducted; 9 cooling is conducted; 10 the dies are opened, and the pressure casting of a product is finished. Compared with the prior art, the pressure casting method can solve the problems that the pressure casting mechanical property of existing aluminum alloy pieces is poor and air holes are prone to generate in die casting pieces.

Description

technical field [0001] The invention relates to the technical field of metal die-casting, in particular to a die-casting method for aluminum alloy auto parts. Background technique [0002] In the auto parts production industry, ordinary die-casting technology is usually used for the production of auto parts, but the die-casting parts produced by ordinary die-casting technology, especially aluminum alloy auto parts, are prone to have pores in the structure and cause bad phenomena. Alloy parts have defects such as low strength, low mechanical properties, poor corrosion resistance, and poor high temperature resistance; how to find a process to improve the mechanical properties of aluminum alloy auto parts and the problem of easy storage of pores in the structure has been entangled in die-casting industry practitioners. Contents of the invention [0003] The problem to be solved by the present invention is to provide a die-casting method for auto parts to solve the problems o...

Claims

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Application Information

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IPC IPC(8): B22D17/00C22C21/18C22C1/02
Inventor 陈永亮
Owner 中山普瑞科精密压铸有限公司
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