UA8874U - Two-layer welded packet for production of bimetallic sheet - Google Patents

Abstract

Two-layer welded packet for preparing the bimetallic sheet consists of basic slab and layer of plating metal equipped with the compensators of deformation and grooves, in which the inserts are mounted. Grooves and compensators of deformation are made in the material of basic slab on two mutually perpendicular sides. In this case, the groove in the cross section is made in the form of a triangle, and the compensator of deformation at the basis has cross section smaller than in the upper part.

Description

Description of the invention

The useful model refers to the field of metallurgy, namely to the production of layered materials by batch 2 method.

A well-known welded package consisting of layers of the base metal, between which there are plates of cladding metal, limited on the perimeter by a frame that connects them into a package. The package is made in the form of a rectangular prism with a ratio of the area of the base metal layer to the area of the clad metal plate and the connecting frame equal to unity | see AS USSR Mo509382, MKY V2ZR 33/02, 1976 |. 70 The disadvantage of such a package is the presence of a connecting frame in it, the manufacture and assembly of which require additional labor and metal costs.

A well-known welded package for the production of layered metal, made in the form of a rectangular prism, consisting of clad blanks with a ratio of their areas equal to one | see a.s. USSR Mobo8634, MKI

V2ZR Z/02, 1978. 12 The disadvantage of this package is its low reliability during heating and rolling due to the small size of the critical cross-section of the welded seam or the high labor intensity of welding work while ensuring the required reliability of the package. At the same time, the height of the welding seam can reach 60-100 mm. The mentioned shortcomings determine the high cost of the letters.

A two-layer welded package for the production of bimetallic sheets is also known, which contains a slab of the base metal, for example, structural steel, and a plate of the cladding layer, for example, stainless steel, with compensators for the deformation occurring during heating and rolling of dissimilar metals and grooves at the end which inserts - plugs are installed | see a.s. USSR Mo184602, MKY V2ZR 3/02, 1966 |. This package is accepted as a prototype.

In the known package, strain compensators are made in the plate of the cladding layer. According to the reliability of the work of the cut seams, their strength should be high enough to ensure the deformation of the compensators pt") to the bend and at the same time not collapse by itself. This strength of the seams in the package is achieved due to an increase in the mass of the weld metal in the critical section, i.e. due to the additional consumption of expensive welding materials used for welding such packages, and additional labor costs for performing an increased amount of welding work. M

In addition, machining the grooves and compensators in the clad metal plate is more labor intensive than in structural steel because the clad metal is more alloyed than the base metal.

In the well-known package, compensators and grooves are made along the entire perimeter of the plate. This ensures biaxial compensation of deformations (stresses) that occur during heating and rolling of the package. Equivalent c compensation of deformations in the package can be achieved even if the length of compensators and grooves is shortened by 2 times. 3o This will reduce the volume of mechanical processing by 2 times. Reducing the length of the grooves and compensators, in turn, will ensure a reduction in the consumption factor at the packet-sheet division due to the reduction of the size of the cut in width and length of two-layer sheets also by 2 times. "

In the known package, the grooves in the cross-section have a rectangular shape. 8

This form of groove under the conditions of operation of the compensator is only used for half.

Depending on the nature of the metals to be joined, the resulting difference in the values of linear elongation between the base metal and the cladding metal when they are heated together can be positive or negative. With a positive difference in elongation, the compensator will deviate from its normal position to the outer side of the package, with a negative difference - to the side of the groove. As you can see, in the first case, the groove is not needed at all. Its role can be performed by a narrow gap. However, due to the fact that in the process of rolling, the drawing of the coating layer will be less than that of the base metal, the groove is still necessary, at least, until the layers adhere to each other. But the shape of the groove should be more rational, taking into account its complete filling with a compensator that bends relative to its base, because the excess volume of the groove is undesirable not only due to the performance of additional mechanical processing, but also due to the excess amount of air contained in in it, and the adsorption of which on the surfaces of the layers to be welded, when heated, leads to a decrease in the quality of their connection.

And" 20 In the known package, the section of the vertical part of the compensator is constant. With such a section of the compensator, the problem of ensuring the reliability of the package during its heating and at the beginning of rolling (before the connection between the layers occurs) is difficult. This is evident from the fact that, under the conditions of reliability of the package, it is necessary for the deformation of the compensators to bend without destroying the seams. It would seem that the problem of the reliability of the package is reduced to increasing the shear strength of the seams in the critical section, that is, increasing the size of the seams, however, it is simple

Therefore, increasing the size of the seam leads to an increase in the hardness (moment of resistance) of the section of the deformation compensator due to the deposited metal, which also requires strengthening the seam. That is, in the known package there is a need to vary the size of the cross-section of the vertical part of the deformation compensator.

The basis of the useful model is the task of creating such a double-layer welded package for the manufacture of a bimetallic sheet, in which, by changing the location and shape of the grooves and deformation compensators 60, a reduction in the labor costs and material consumption of the package is achieved while simultaneously increasing its structural reliability.

The task is achieved by proposing a two-layer welded package for the manufacture of a bimetallic sheet, consisting of a main slab and a layer of cladding metal, provided with strain compensators and grooves in which plug inserts are installed, in which, according to a useful model, grooves and because the deformation compensators are made in the material of the main slab on two mutually perpendicular sides,

and the groove in the cross-section is made in the shape of a triangle, and the deformation compensator at the base has a cross-section smaller than that of its upper part.

The technical result is achieved due to the fact that: - the grooves are made in a slab of the base metal, which is usually used less alloyed structural steel, which creates significantly fewer difficulties during its mechanical processing, the more alloyed the cladding metal is, with its special properties (corrosion stability, heat resistance, wear resistance, etc.); - grooves are made on one short and one long side of the slab; - the grooves in the cross section have the shape of a triangle; 70 - the deformation compensator has a cross-sectional area at the base smaller than in the upper part, due to the fact that the inner wall of the compensator and the facing plate form an obtuse angle, or due to the fact that the inner wall of the compensator and the surface of the facing plate, form a right angle, and the deformation compensator has a notch at its base on the outside.

It is much easier and cheaper to make an incision than to perform work on strengthening the seam.

The drawing (Fig. 1, Fig. 2) shows the proposed package.

The package consists of a slab 1 of the base metal with a triangular groove 2 and a deformation compensator 3, which perceives the forces arising during heating and at the beginning of rolling, and a plate 4 of the plating metal. The perimeter of the package is welded with a hermetic seam 5. To relieve the seam during heating and rolling, the base of the compensator has a cut 6 on its outer side. Plugs 7 are installed at the exit of the groove in the corners.

Example: They collected 1 laboratory measuring 26xboOhx18 Ohm and 1 industrial measuring 280x1300x2100 Ohm. two-layer packages. Packages were welded around the perimeter by manual electric arc welding. ZA-981/15 brand electrodes, d-5 mm, were used as welding materials.

The thickness of the cladding plate made of ХИ8НИОТ steel for the laboratory package was taken to be 4mm, and for the industrial package - ЗОмм. The main workpiece made of steel 09G2 for the laboratory package was taken equal to 22 mm, and for the industrial one - 250 mm. The thickness of the compensator in the upper part for the laboratory package was taken to be equal - 8 mm, for industrial - 20 mm, and in the lower part - bmm for laboratory and 14 mm for industrial. -

The height of the compensator was assumed equal to 7 mm for the laboratory package, and 25 mm for the industrial one.

The grooves were made in the cross section in the form of a triangle. The width of the groove for the laboratory package was accepted - Vmm, for the industrial one - 15 mm. Grooves and compensators were made on one long and one short side of the blank (slab) of the base metal. The size of the seam in the critical section for laboratory and industrial packages was, respectively, 4 and - 15 mm. co

After assembling and welding the packages along the perimeter, two-layer sheets with a thickness of 8mm and 4O0mm were made using the accepted technology (heating, rolling, heat treatment, ultrasound, cutting to size). Heating and co-rolling confirmed the high structural reliability of the packages due to the presence of cuts in the base of the deformation compensators. Quality control showed that the continuity and strong connection of the layers took place over the entire contact surface of the clad sheets. "

Distinctive features of the claimed object: deformation compensators and grooves are made on a base metal slab; The deformation compensators and grooves are made only on the short and long sides of the slab; c grooves in the cross section have the shape of a triangle; deformation compensators at the base have a smaller cross-section than at the top. ;" The use of the claimed invention will allow to reduce labor costs and material consumption of manufacturing the package and increase its structural strength. (ee) (ee) -I

T" 50

Su; 60 b5

I. also in

AND

In "KE

Z ХХ 1 ю ХУ 2 ХХ х 6 - ah - «

And | | -

And And And

I I I s shi

And! ! co

AND

And And she

And maybe another h

And and -

And I

And with the same xx

From 7th Go ha ich yayattttaya tt tya iy HO so EAST Tl tt tt t tt -I

Her" 70 7

Su

Claims (1)

The formula of the invention A double-layer welded package for the production of a bimetallic sheet, consisting of a main slab and a layer of cladding metal, equipped with deformation compensators and grooves in which plug inserts are installed, because it differs in that the grooves and deformation compensators are made in the material of the main slab in two mutually perpendicular sides, and the groove in the cross-section is made in the shape of a triangle, and the deformation compensator in the base has a cross-section smaller than in the upper part. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated 65 microcircuits", 2005, M 8, 15.08.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine.