SU1185878A1 - Aluminium-base alloy for making parts of intricate shape - Google Patents

Abstract

S11PAV BASED ON ALPMINIA FOR MANUFACTURING DETAILS COMPLEX, containing zinc, magnesium, copper, iron, titanium, zirconium and beryllium, characterized in that, in order to increase plasticity, reduce installation stresses and stabilize the geometric dimensions of parts during heat treatment, it contains components in the following ratio, wt.%; Zinc. 6.35-8.0 Magnesium0.5-2.3 Copper0.8-3.0 Iron0.06-0.25 Titanium0.03-0.1 Zirconium- 0.07-0.25 Berylshiy 0,0001-0 , 05 Aluminum Rest

Description

The invention relates to metallurgical alloys based on aluminum, intended for the manufacture of complex parts of extruded and forged semi-finished products.

The parts of complex shape used for assembling structures have connecting holes or other elements of the joint. Changes in the geometric dimensions are the cause of the mismatch of the connecting elements (holes, etc.), which, when assembling the stack, leads to the occurrence of a high level of mounting stresses. The latter significantly reduce the life of the product.

Stabilization of the dimensions of parts during heat treatment and reduction of the motive stresses is achieved due to the balanced alloying of the alloy with elements that increase and

reduce the lattice parameter of aluminum, taking into account dissolution and their allocation at all stages of the technological process of manufacturing the semi-finished product and part (homogenization, deformation,

00 01 hardening, aging). This leads to the fact that after the final heat treatment the geometrical dimensions of the part change insignificantly,

00, therefore, the stresses in the structure associated with this phenomenon are drastically reduced.

It was established experimentally that the greatest effect in the proposed j-aeMOM alloy is obtained when the ratio of the iron content to the titanium content is in the range of 1-8,

 For the experiments, 370 mm ingots of seven alloys were cast, the composition of which is given in Table 1.

after ingots and homogenization from ingots at 460 + 1OC, 8 hours were pressed on a press 5,000 i.e. strip section 300X60, mm at a temperature of 4004; 0 ° C.

By machining from a strip, a waffle panel with a length of 2200 mm was obtained. After quenching by mode; heating, 40 minutes cooling in water with temperature, the panels were controlled by stretching by 1.5%. Further, the old regimes TI, T2, TZ. On aged panels, determine the magnitude of the change in their geometric dimensions.

(lengths - А1 mm), and also the level of arising installation (С /) stresses was measured. The results are shown in table 2 and 3.

From the data given in Table 2, 3, it can be seen that the proposed composition has strength properties and ductility at the level of a known alloy, significantly surpasses it in characteristics that characterize the change in geometric dimensions during heat treatment A1 and the level of assembly stresses arising during assembly (5 .

Table 1

table 2

Table 3

Claims (1)

ALUMINUM ALLOY FOR MANUFACTURING COMPLEX FORM PARTS, containing zinc, magnesium, copper, iron, titanium, zirconium and beryllium, which can be molded in order to increase ductility, reduce mounting stresses and stabilize the geometric dimensions of parts during heat treatment , it contains components in the following ratio, wt.%; Zinc Magnesium Copper Iron Titanium Zirconium * Beryllium Aluminum 6.35-8.0 0.5-2.3 0.8-3.0 0.06-0.25 0.03-0, I 0.07-0.25 0.0001-0.05 Rest