Aluminum strontium alloy with extremely excellent die casting performance

An aluminum-strontium alloy, excellent technology, applied in the field of aluminum-strontium alloy, can solve the problems of low liquid-solid phase solidification temperature range, poor reusability of waste materials and slag materials, low dynamic viscosity of aluminum-strontium alloy, etc., and achieve low liquid-solid phase The effect of solidification temperature range, low gas absorption of molten metal, and excellent filling performance

Inactive Publication Date: 2018-04-17
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(5) The dynamic viscosity of Al-Sr alloy is low
The aluminum-strontium alloy has a low solidification temperature range of the liquid-solid phase, which can solve the problems of large thermal cracking tendency during casting, obvious casting voids and looseness, extensive melt treatment process, poor quality, large thermal cracking tendency, poor casting performance, and low product yield. Technical problems such as low and high temperature strength, poor reusability of waste materials and slag materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An aluminum-strontium alloy smelted at 710 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.2wt.%, Ca: 0.4wt.%, Ge: 1.3wt.%, Ru: 0.4wt.%, V: 0.3wt.%, Ti: 0.1wt .%, Sm: 0.2wt.%, Eu: 0.1wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 710 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 710°C for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 10m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-strontium alloy castings. The final heat treatment process of these castings is: vac...

Embodiment 2

[0020] An aluminum-strontium alloy smelted at 740 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.3wt.%, Ca: 0.4wt.%, Ge: 1.3wt.%, Ru: 0.5wt.%, V: 0.4wt.%, Ti: 0.1wt .%, Sm: 0.2wt.%, Eu: 0.1wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 740 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 740 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 12m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-strontium alloy castings. The final heat treatment process of these castings i...

Embodiment 3

[0022]An aluminum-strontium alloy smelted at 790 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.2wt.%, Ca: 0.4wt.%, Ge: 1.3wt.%, Ru: 0.5wt.%, V: 0.4wt.%, Ti: 0.1wt .%, Sm: 0.2wt.%, Eu: 0.1wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 790 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 790 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 10m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-strontium alloy castings. The final heat treatment process of these castings is...

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Abstract

The invention discloses an aluminum-strontium alloy with extremely excellent die-casting performance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.0‑1.6wt.%, Ca: 0.4‑0.5wt.%, Ge: 1.2‑1.5wt.%, Ru: 0.4‑0.6wt.%, V: 0.2 ‑0.5wt.%, Ti: 0.1‑0.2wt.%, Sm: 0.2‑0.3wt.%, Eu: 0.1‑0.2wt.%, and the balance is aluminum. The aluminum-strontium alloy material has good casting properties and is suitable for pressure casting of thin-walled parts under a protective atmosphere. It is especially suitable for casting lightweight structural materials that require lightweight features, and has a huge market prospect.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-strontium alloy. Background technique [0002] Adding strontium as an alloying element to aluminum forms an aluminum-strontium alloy. Strontium can increase the elastic modulus of aluminum alloy. Generally speaking, for every 1wt.% strontium added to aluminum alloy, its elastic modulus will increase by about 6.2%. Aluminum-strontium alloys are mainly developed for aircraft and aerospace equipment, so they are also mainly used in aerospace fields, as well as ordnance and nuclear reactor materials, tank armor-piercing projectiles, torpedoes and other weapon structural parts. Aluminum-strontium alloys can be used in military aircraft, civil airliners and helicopters, mainly for fuselage frames, hatches, fuel tanks, etc. The use of aluminum-strontium alloy to manufacture aircraft can reduce its weight by 12.6wt.%, save fuel by 4.3%, reduce aircraft manufacturing costs b...

Claims

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Application Information

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