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

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 ...

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.