SU678889A1 - Aluminium-base casting alloy - Google Patents

Description

(54) FOUNDRY ALLOY BASED ON ALUMINUM

: i; ; but;., ;. iJf.i -yf.Uj .; ;.; ;:

This invention relates to the field of metallurgy of aluminum-based cast alloys for use in various industrial fields. Known aluminum-based foundry alloy containing, in weight,%: Copper5-6.5 Manganese0.15-0.5 Titanium0.05-0.3 Chromium 0.1-0.25 Cadmium0.05-0.2 AluminumOther Properties of cast samples following Strength, kgf / mm 36-44 Yield strength, kgf / mm 26-30 Relative elongation,%. 2-6 The closest to the proposed alloy is a foundry alloy based on aluminum, containing copper, manganese, titanium, cadmium, neodymium 2 Mechanical properties of the alloy processed by the T5 mode / quenching 540 + 5 ° C, 14 h and aging 170 + 5 ° C, 8 h, are presented in table.1. However, the known alloys have lower plasticity during sand casting, are prone to cracking when casting in a metal mold, low values of mechanical properties at temperatures up to 250 s. The purpose of the invention is to develop an alloy with high strength at temperatures up to 250 s. To do this, in an aluminum-based alloy containing copper, manganese, titanium, cadmium, zirconium, yttrium and indium are additionally introduced, with the following ratio of components, wt.%: Copper 3.5-6.0 Manganese 0.2-1.2 Titanium0, 1-0.4 Cadmium 0.01-0.2 Zirconium 0.05-0.35 Yttrium 0.01-0.15 Indium 0.001-0.05 Aluminum Rest Complex modification with titanium, zirconium, yttrium and indium contributes to more efficient grinding of grain and a significant increase in the strength and ductility of the alloy.

The introduction of yttri promotes an increase in the technological properties: the propensity to distribute is reduced from C 27.5 mm to 17.5 (ring width), fluidity increases from 245 mm to 280 mm (bar length).

For the test: the vanilla of the proposed alloy, the compositions were prepared, the composition of the tested alloys and mechanically cast in the ground, diameter 12 mm

Separately cast in the chill mold, 12 mm

thermal stability and processability, it additionally contains it. three, zirconium and indium in the following ratio of components, weight,%: Copper3,5-6,0

Manganese 0.2-1.2

The logical properties of the samples, cast in a chill mold, are listed in Table 2.

Durability for 100 hours at a test temperature: 16 kgf / mm 250®S 12 kgf / mm 7.0 kgf / mm Thus, the proposed alloy, which combines high performance and strength with heat resistance, will find wide application in industry.

T a b jf and c a

5-8

5.5

17-22

table 2

Sources of information taken into account in the examination

1. USSR author's certificate №320548, cl. C 22 C 21/00, 1972.

2. USSR author's certificate number 489420, cl. C 22 C 21/00, 1969.

Claims (1)

Claim A cast alloy based on aluminum, including copper, manganese, titanium and cadmium, characterized in that, in order to increase strength, heat resistance and technological- ·. In fact, it additionally contains yt. tri, zirconium and indium in the following ratio of components, wt.%: Copper 3.5-6.0 Manganese 0.2-1.2 titanium 0.1-0.4 Cadmium 0.01-0.2 Yttrium 0.01-0.15 fifty Zirconium 0.05-0.35 Indium 0.001-0.05 Aluminum Rest