Aluminum-base alloy

FIELD: metallurgy, alloys.

SUBSTANCE: invention relates to compositions of deformable aluminum-base alloys. Proposed alloy comprises the following components, wt.-%: zinc, 5.0-7.0; magnesium, 0.4-0.8; copper, 0.8-1.2; manganese, 0.8-1.2; zirconium, 0.2-0.3; titanium, 0.2-0.3; niobium, 0.2-0.3; nickel, 3.0-5.0; boron, 0.02-0.03, and aluminum, the balance. Proposed alloy possesses the enhanced strength. Proposed alloys can be used in aircraft construction and automobile construction.

EFFECT: improved and valuable property of alloy.

1 tbl

 

The invention relates to the field of metallurgy, in particular to compositions of wrought alloys based on aluminium, which can be used in aircraft building, automotive industry.

Known alloy based on aluminum, containing, wt.%: zinc 3,0-10,0; magnesium 0,75-4,0; copper 0,5-3,0; manganese 0.1 to 1.5; Titan and niobium to 0.25; zirconium up to 0.5; aluminum else [1].

The objective of the invention is to increase the strength of the alloy.

The technical result is achieved in that the base alloy of aluminum containing zinc, magnesium, copper, manganese, zirconium, titanium, niobium, impose additional Nickel and boron in the following ratio, wt.%: zinc 5,0-7,0; magnesium 0,4-0,8; copper 0,8-1,2; manganese 0,8-1,2; zirconium 0,2-0,3; titanium 0,2-0,3; niobium 0,2-0,3; Nickel 3,0-5,0; Bor 0,02-0,03; aluminum else.

The table shows the composition of the alloy.

tr>
Table
ComponentsComposition, wt.%
123
Zinc5,06,07,0
Magnesium0,80,60,4
Copper1,21,00,8
Manganese0,81,01,2
Zirconia0,30,250,2
Titanium0,20,250,3
Niobium0,30,250,2
Nickel3,04,05,0
Bor0,020,0250,03
Aluminumrestrestrest
Ultimate tensile strength, MPa˜750˜750˜750

In the composition of the alloy components manifest themselves as follows.

Zinc, copper and magnesium improve the mechanical properties of the alloy. Manganese, Nickel and niobium neutralize the negative effect of iron impurities on the mechanical properties of the alloy, reducing its porosity. Titanium and zirconium are crushed structural components of the alloy. Boron contributes to refining, increases the ductility of the alloy.

Smelting alloy is carried out in crucible (gas) submerged arc furnaces. As the cover of the flux may be used a mixture of sodium chloride (45 wt.%) and potassium (55 wt.%). The flux should be used in quantities of 1% by weight of the mixture.

The alloy is subject to heat treatment. Casting is slowly heated in a furnace until the temperature is URS 465-475° With aged 16-18 hours, then cooled in water and do artificial aging at a temperature of 120-140°C for 3-5 hours with subsequent cooling in air.

The source of information

1. GB 544439, C22C 21-10, 1942.

The base alloy of aluminum containing zinc, magnesium, copper, manganese, zirconium, titanium, niobium, characterized in that it further contains Nickel and boron in the following ratio, wt.%: zinc 5,0-7,0, magnesium 0.4 to 0.8, copper 0,8-1,2, manganese 0,8-1,2, zirconium, 0.2 to 0.3, the Titan of 0.2-0.3, NB 0.2 and 0.3, Nickel 3,0-5,0, boron 0,02-0,03, aluminum else.



 

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