High-strength aluminum-yttrium alloy containing Ca and Hf for pressure casting

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

Inactive Publication Date: 2018-07-06
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 aluminum yttrium alloy is low
The aluminum-yttrium alloy has a low liquid-solid phase solidification temperature range, 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] A high-strength aluminum-yttrium alloy containing Ca and Hf for die-casting. In terms of weight percentage, the chemical composition of the alloy is: Y: 1.6wt.%, Ba: 0.7wt.%, Zn: 2.9wt.%, Ca: 0.8wt.%, Cu: 0.5wt.%, Zr: 0.1wt .%, Hf: 0.3wt.%, Er: 0.7wt.%, 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-yttrium alloy castings. The final heat treatment process of these castings is: vacuum solution tr...

Embodiment 2

[0020] A high-strength aluminum-yttrium alloy containing Ca and Hf for die-casting. In terms of weight percentage, the chemical composition of the alloy is: Y: 1.6wt.%, Ba: 0.7wt.%, Zn: 2.8wt.%, Ca: 0.8wt.%, Cu: 0.6wt.%, Zr: 0.1wt .%, Hf: 0.4wt.%, Er: 0.7wt.%, 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 9m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped aluminum-yttrium alloy castings. The final heat treatment process of these castings is: vacuum soluti...

Embodiment 3

[0022] A high-strength aluminum-yttrium alloy containing Ca and Hf for die-casting. In terms of weight percentage, the chemical composition of the alloy is: Y: 1.5wt.%, Ba: 0.6wt.%, Zn: 3.1wt.%, Ca: 1.2wt.%, Cu: 0.8wt.%, Zr: 0.1wt .%, Hf: 0.4wt.%, Er: 0.6wt.%, 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-yttrium alloy castings. The final heat treatment process of these castings is: vacuum solut...

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Abstract

The invention discloses a high-strength aluminum-yttrium alloy containing Ca and Hf for pressure casting and a processing process thereof. The high-strength aluminum-yttrium alloy containing Ca and Hfis prepared from chemical components: by weight percent, 0.8-2.0 wt.% of Y, 0.6-0.8 wt.% of Ba, 2.5-3.2 wt.% of Zn, 0.6-1.5 wt.% of Ca, 0.4-0.9 wt.% of Cu, 0.1-0.2 wt.% of Zr, 0.2-0.5 wt.% of Hf, 0.6-0.8 wt.% of Er and the balance aluminum. The aluminum-yttrium alloy material has good casting performance, and is suitable for pressure casting of thin-wall parts under a protective atmosphere. The aluminum-yttrium alloy material is especially suitable for casting light-type-structure materials requiring lightweight characteristics, and has broad market prospects.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-yttrium alloy. Background technique [0002] The addition of yttrium to aluminum as an alloying element forms an aluminum-yttrium alloy. Yttrium can increase the elastic modulus of aluminum alloy. Generally speaking, for every 1wt.% yttrium added to aluminum alloy, its elastic modulus will increase by about 7.3%. Aluminum yttrium alloy is mainly developed for aircraft and aerospace equipment, so it is mainly used in the aerospace field, as well as ordnance and nuclear reactor materials, tank armor-piercing projectiles, torpedoes and other weapon structural parts. Aluminum-yttrium alloys can be used in military aircraft, civil airliners and helicopters, mainly for fuselage frames, hatches, fuel tanks, etc. Using aluminum-yttrium alloy to manufacture aircraft can reduce its weight by 12.6wt.%, save fuel by 5.3%, reduce aircraft manufacturing costs by 2.1%, and reduce ...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22F1/02C22F1/053
CPCC22C21/10C22C1/026C22F1/02C22F1/053
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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