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Corrosion-resistant aluminum alloy containing Ca and Cr and used for die casting and processing technology thereof

An aluminum alloy, corrosion-resistant technology, applied in the field of alloys, can solve the problems of destroying workshops, equipment and ecological environment, poisoning the environment, reducing service life, etc., achieving excellent filling performance, excellent flame retardant performance, and shrinkage cavity formation Tendency to small effects

Inactive Publication Date: 2018-07-20
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of both methods is limited by the inevitable drawbacks
For example, it is easy to produce toxic gas to pollute the environment and cause flux inclusions to damage the performance of the alloy.
Moreover, flux inclusions are likely to become a source of corrosion during product use, accelerating material corrosion and reducing service life
In addition, the chlorine salt and fluorine salt in the flux are easy to volatilize at high temperature and produce some strong corrosive gases, which will damage the plant, equipment and ecological environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A corrosion-resistant Ca and Cr-containing aluminum alloy for die-casting melted at 750°C. In terms of weight percentage, the chemical composition of the alloy is: Ca: 0.8wt.%, Cr: 1.9wt.%; Pd: 1.0wt.%, Ge: 0.6wt.%, Sb: 0.3wt.%, Be: 0.5wt .%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 750 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 750°C for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots. The ingot moves down at a speed of 8m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped aluminum-calcium alloy castings; the final heat treatment ...

Embodiment 2

[0019] A corrosion-resistant Ca and Cr-containing aluminum alloy for die-casting melted at 770°C. In terms of weight percentage, the chemical composition of the alloy is: Ca: 0.8wt.%, Cr: 2.1wt.%; Pd: 0.9wt.%, Ge: 0.6wt.%, Sb: 0.3wt.%, Be: 0.5wt .%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 770 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 770°C for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots. The ingot moves down at a speed of 8m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped aluminum-calcium alloy castings; the final heat treatment ...

Embodiment 3

[0022] A corrosion-resistant Ca and Cr-containing aluminum alloy for die-casting melted at 790 degrees. In terms of weight percentage, the chemical composition of the alloy is: Ca: 0.9wt.%, Cr: 2.1wt.%; Pd: 0.9wt.%, Ge: 0.6wt.%, Sb: 0.3wt.%, Be: 0.5wt .%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the atmosphere-protected induction furnace, and use a silicon carbide crucible; induction heat to 790 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; put the alloy liquid in After standing at 790°C for 10 minutes, it is cast into the equipment at the same level as the hot top for semi-continuous casting into the required square and round ingots. The ingot moves down at a speed of 8m / min. The ingot can be used as a casting raw material for pressure casting in subsequent processes to prepare complex-shaped aluminum-calcium alloy castings; the final heat trea...

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Abstract

The invention discloses a corrosion-resistant aluminum alloy containing Ca and Cr and used for die casting and a processing technology thereof. The alloy comprises the components of, by weight, 0.5-1.0 % of Ca, 1.6-2.4% of Cr, 0.8-1.2% of Pd, 0.5-0.8% of Ge, 0.2-0.5% of Sb, 0.4-0.8% of Be, and the balance aluminum. The aluminum-calcium alloy has excellent die-casting performance and excellent corrosion resistance, and it is expected that the corrosion-resistant aluminum alloy containing Ca and Cr and used for die casting and the processing technology thereof have positive significance to the aluminum alloy die-casting technology and even the whole die casting industry and development and promotion of the technique thereof.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-calcium alloy. Background technique [0002] Aluminum alloy is a cheap, energy-saving and high-quality new material that has been widely used at home and abroad in recent decades. It has the advantages of high tensile strength and hardness, good damping, good wear resistance, small friction coefficient, low friction temperature rise, and low material and manufacturing costs. At the same time, it also has good process performance, not only can be used for die casting, but also suitable for sand mold, metal mold, graphite mold, continuous casting, etc. Casting aluminum alloy is to fill the casting mold with molten metal to obtain the aluminum alloy of parts of various shapes. Cast aluminum alloy has good casting performance and can be made into parts with complex shapes; it does not require huge additional equipment; it has the advantages of saving metal, reducing cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04C22F1/02
CPCC22C21/00C22C1/026C22F1/02C22F1/04
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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