UA21238U - Method for production of two-layered bimetallic sheet compositions - Google Patents

Abstract

A method for production of two-layered bimetallic sheet compositions consists in joint rolling of soft and solid sheet components between two driving cylindrical working rolls. Solid component contains inclined longitudinal grooves made at sharp angle to the longitudinal axis and at sharp angle to the plane of connection, in this case adjacent grooves are inclined toward different sides.

Description

Description of the invention

The useful model relates to the technology of production of two-layer bimetallic compositions by rolling due to the mechanical connection of the components. Methods of production of two-layer bimetallic sheets, developed on the basis of a useful model, can be used to obtain high-value parts of machine-building and metallurgical complexes, which are subject to increased requirements for strength and thermal conductivity; strength and electrical conductivity, etc.

There are known methods of production of multi-layered polymetallic compositions, according to which double and triple packages of sheets are hot-rolled at 70°, and due to large plastic deformation, surfaces are welded and the boundaries of layered metal connections are formed |11).

However, these methods have a limited assortment in terms of thickness and mass of multilayer packages and do not ensure the connection of some metals due to the formation of intermetallic layers between them.

Also known, chosen as a prototype, is the method of production of two-layer bimetallic sheets |2), which is based 19 on hot rolling of the package, and in order to increase the strength of the connection, rectangular grooves with a height of 0.2-0.3 of the layer thickness are made on the main layer, and the protrusions located between the grooves are placed at a distance equal to 2-2.5 of their width, and the protrusions are made with triangular grooves, the opening angle of which is 50-60. During hot rolling, in the process of deformation, the protrusions penetrate into a softer metal, the corners of the protrusions unfold, create a mechanical connection of the "dovetail" type, thus the connection 20 occurs due to both diffusion and mechanical coupling.

Common essential features of the known method and the one that is claimed are the use of the rolling process during production and the mechanical connection between the components of the resulting bimetallic sheets.

The disadvantage of this method of production of bimetallic sheets is the difficulty of making grooves on the main layer, the shape of the grooves imposes certain restrictions on the package rolling scheme, and the impossibility of bimetal recycling. 25 The basis of the useful model is the task of obtaining inexpensive, relatively thick bimetallic sheets, which are subject to increased strength requirements, on existing rolling equipment and ensuring the possibility of further utilization of the obtained sheets.

The task is solved by the fact that in order to improve the quality of the resulting composition by increasing the strength of the connection, one of the components contains inclined longitudinal grooves made at an acute angle to the longitudinal axis of 30 and at an acute angle to the plane of the connection, while the adjacent grooves are inclined in different directions. co

During simultaneous rolling of two metal components between two driving cylindrical work rolls, plastic deformation and flow of one component into the inclined longitudinal grooves of the second component occurs. As a result, there is a reliable mechanical connection of the components that provide the necessary tear strength "- due to the frictional forces on the contact surfaces of the grooves and due to the engagement of the metal tongues in the grooves and on the cut by

Due to the introduction of a soft component in the grooves of a hard component. The scheme of the mechanical connection is explained with the drawing in Fig. 1, position 1 is the soft component, position 2 is the hard component.

The component that deforms during simultaneous rolling will be called soft or that which is plated, the other component that contains inclined longitudinal grooves and does not deform during rolling will be called hard or that which is plated. WITH

The operation of obtaining longitudinal inclined grooves in the solid component slightly increases the duration of the process of production of two-layer bimetallic sheets. However, this method ensures the formation of a reliable connection between metal layers with such a combination of materials that are expensive or impossible to obtain by other methods.

Execution of longitudinal grooves according to the spaced "dovetail" scheme ensures a reliable connection of metal layers. The inclination of the grooves at an acute angle to the plane of connection ensures the possibility of further utilization of the obtained bimetallic sheets. o Features that characterize a useful model in certain forms of its use: - Separation of bimetal during its disposal is carried out by cutting the layer that is plated along the longitudinal axis of symmetry and alternately pulling out the resulting halves from the grooves of the layer that is plated. o The soft component can be heated to increase plasticity before flattening. (4) 50 It is possible to choose such mode of flattening of bimetal, in which the longitudinal grooves will be incompletely filled and thus form technological holes, necessary for further use of bimetallic salt sheets.

The claimed method is carried out as follows.

A metal sheet is placed on the plate with grooves, which plays the role of a soft component. The plate is shown in Fig. 2 and 99 Fig. 3, longitudinal grooves are made in the plate. The grooves are made at an acute angle o to the horizontal plane, and adjacent grooves are inclined in opposite directions. Thus, adjacent grooves form a spread "dovetail".

In addition, the grooves are made at an acute angle D to the longitudinal axis of the plate. The grooves, made on different sides from the longitudinal axis of the plate, are inclined in opposite directions. Then joint rolling of soft and hard components is carried out. The scheme of the rolling process is explained by the drawings in Fig. 4. and Fig.5. During rolling, the coating layer 1 is deformed and flows into the longitudinal grooves of the coating layer, 2.

Combined rolling is carried out on sheet rolling mills with a duo value scheme.

Specific examples of the implementation of the method:

Example 1 b5 Bimetallic sheet "copper-steel". It is used for the production of crystallizer walls of machines for continuous casting of blanks. In the course of rolling, the longitudinal grooves in the steel layer were not completely filled and thus the holes used for cooling the crystallizer were left.

Example 2

Bimetallic sheet "bronze-steel". It is used for the production of protective bars for rolling mills.

Sources. 1. Kobelev A.G., Potapov I.N., Kuznetsov E.V. Technology of layered materials. - M.: Metallurgy. - 1991. - 248 p. 2. A.S. 772769 USSR, MKY V2ZK 20/00. Package for obtaining multi-layer sheets / V.A. Lutsenko, Yu.V. 70 Vorotintsev, A.Y. Besedin, D.V. Solovyov (USSR). - Mo2756972/25-27; Application 23.04.79; Publ. 23.10.80, Bull.

Mo39. - 2.

Claims (1)

The formula of the invention , , , , , 0, The method of production of two-layer bimetallic sheet compositions, which consists in the simultaneous rolling of soft and hard sheet components between two driving cylindrical working rolls, which is characterized by the fact that the hard component contains inclined longitudinal grooves made under a sharp at an angle to the longitudinal axis and at an acute angle to the mating plane, while adjacent grooves are inclined in different directions. - s so s "- s - with . and? name) - name) o 50 IR e) c 60 b5