SU1331612A1 - Method of producing bimetallic steel/aluminium wire - Google Patents

Abstract

The invention relates to a method for manufacturing a bimetallic aluminum-aluminum wire. The purpose of the invention is to increase the yield. Before forming the shell, the aluminum powder is heated to a temperature of 150-450 s. The shell is formed by a screw feeding the powder around a preheated steel core. After the shell has been formed, its sealing deformation is carried out, which is carried out in two stages: the first stage is in the monolithic die, and the second is in the caliber formed by the fibers. Roller compression is varied by changing the calibrating diameter of the monolithic die. 1 ill., 1 tab. 1 (L 00 00

Description

The invention relates to the production of layered materials and can be used in the manufacture of bimetallic galea; piercing by rolling aluminum powder on steel core.

The aim of the invention is to increase the yield.

Before forming the aluminum powder, the aluminum powder is heated to 150 -, the compressed deformation of the formed shell and the core is performed at the bottom of the stage, the first stage being produced in a monolithic die with a decrease in the amount of aluminum powder by 2-30%, and the second stage - rolling in rolls with compression of 8-20%.

Heated the aluminum powder before forming the shell to a temperature of less than 150 ° C leads to the formation of a fragile aluminum shell in the monolithic filament breaking down at its outlet, which causes a portion of the broom to not enter the deformation zone in the rolls (gauge) and increase the consumption of aluminum powder. Heating the powder to a temperature of more than 450 ° C causes it to sinter when the shell is formed before it enters the monolithic filament, which causes the aluminum powder to be consumed because of the need to remove the speckled particles from the shell formation zone and reduces the yield. In addition to the increased consumption of powder, this leads to the need for frequent process shutdowns, which reduces productivity.

A decrease in the volume of aluminum powder of a monolithic die less than 12% leads to the destruction of the shell at the exit of the die and an increase in the consumption of aluminum powder. A decrease in the volume of aluminum powder by more than 30% leads to overfilling of the gauge between the legs, an increase in bonding (whiskers) and, consequently, an increase in the consumption of aluminum powder. Caliber overflow occurs due to the high density of the shell after the monolithic die, reducing the possibility of mutual compaction and movement of aluminum particles in the rolls of the cage, which leads to overfilling of the caliber.

The reduction of rolling reduction in the roll stands of less than 8% leads to

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deterioration in the quality of adhesion of aluminum to steel, an increase in the yield of rejects, which, in turn, causes additional; a distinctive consumption of aluminum powder and steel core. The increase in reduction by more than 20% of the fuel supply system. To an unprecedented increase in wastewater and an increase in the consumption of aluminum powder,

In the drawing, the production scheme of bimetallic steel-aluminum wire,

PRI me R. The bimetallic steel-aluminum wire is produced with a diameter of 5.0 mm. For this purpose, a steel core 1 with a diameter of 3.8 of grade 20 steel is used, which is preheated by an electrocontact method in rollers 2 and 3. Steel core 1 is passed through an axial channel A of screw 5 of the shell formation unit. The shell is formed in channel 6 by moving the aluminum powder preheated in the electric furnace 7, where it comes from the hopper 8. The heating temperature of the aluminum powder is controlled with a thermometer 9. shell formations perform its compaction deformation, which is produced in two stages. The first stage is carried out in a monolithic die 10, and the second in a caliber formed by rolls t1.

The change in the decrease in the volume of the aluminum powder in the monolithic fiber is made by increasing or decreasing the amount of powder supplied by the screw 5, increasing or decreasing its speed of rotation. The roller roll is changed by changing the calibrating diameter of the monolithic die.

In the manufacture of steel-aluminum-sofi wires, the costs of aluminum powder are controlled, taking into account the amount of aluminum entering the coating, and other losses of powder (placer, specimen lumps, etc.).

The results of the experiment are presented in the table.

The analysis of the table shows that the production of bimetallic steel-aluminum wire according to the proposed method provides poppsna output, saving aluminum powder compared with the known volume (experience --- - 1,2,3,4,7,9,11,13, 14), while the total waste of aluminum powder 18-21% of the total amount of waste spent, () tk-l of the proposed technological parameters (experiments 5,6,8,10, 12,15,16) leads to an increase ( up to 39-47 /) waste aluminum powder Production of bimetallic aluminum wire by a known method dit an increased flow of powder (54%).

Thus, the proposed method for the production of bimetallic steel-aluminum wire provides increased yield and saving aluminum powder.

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Formula and

A method of manufacturing a bimetallic-sta.t from a blue wire, including .. -, -, -., P, - - er,

Formeronis Yaa-10CH; h1 1 HJ ujii-j-mini-noponiKa and sealing deforma, yuforminannsty shell and core, m and so that, with the pot-yeni pykhod suitable, before forming the shell, aluminum powder is heated to temperatures of 150–450 ° C, and sealing deformation is performed in two stages, with the first stage being carried out in a monolithic die with a volume of aluminum powder mixed by 12–30% relative to the wire volume, and the second - by rolling in rolls with compression 8-20%.

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Claims (2)

Formula and ebreg and I A method of manufacturing a bimetallic stap ^ aluminum wire, including ··· · • .-- 'g ·? ge.t '- ’of the casing, forming On it ioochki from aluminum powder and sealing deformation of the formed shell and 10 cores are distinguished by the fact that, with a chain for increasing the yield, aluminum powder is heated to a temperature of 150-450 ^ 0 before the formation of the shell, and the sealing deformation is performed in two stages, the first stage being carried out in a monolithic fiber with a decrease the volume of aluminum powder by 12 30% in relation to the volume of the wire, 2o and the second - by rolling in rolls with a compression of 8-20%. Experience! Diameter Aluminum powder heating temperature, ° C The decrease in the volume of aluminum powder in a monolithic fiber,% The relative compression in the rolls,% Aluminum powder waste,% of the total amount of powder expended Note steel core mm one 2 3 .... Ϊ ._____ J 5 6 7 one 3.8 250 twenty 10 21 2 3.8 150 fifteen 10 twenty 3 3.8 200 fifteen fifteen 19 four 3.8 220 17 eighteen 19 5 3.8 180 10 fifteen 41 6 3.8 140 fifteen 1 7 42 7 3.8 450 fifteen fourteen ' eighteen 8 3.8 460 fifteen fourteen 39 Frequent process shutdowns 9 3.8 350 12 eighteen eighteen 10 3.8 350 eleven eighteen 47 eleven 3.8 350 thirty eighteen 19 12 3.8 300 31 13 42 Big marriage CA wire