SU733756A1 - Bimetallic article producing method - Google Patents

Description

(54)

METHOD OF MAKING BIMETALLIC PRODUCTS

The invention relates to the processing of metals by pressure.

A known method for producing products with local plating l includes manufacturing a blank with grooves into which inserts are inserted from a cladding material, cleaning and sealing the surfaces to be welded, heating and plastic deforming.

The disadvantage of the method is a large amount of mechanical processing and the need for complete sealing — connectable from surfaces to obtain a high-quality bimetallic compound.

Also known is a method of manufacturing bimetallic products by heating, cleaning contact surfaces and collecting parts of metals with different hardness into a composite preform, as well as subsequent pressing of a composite backing from a container through a matrix 2.

It is not possible to obtain bimetallic blanks with outer cladding of a more solid metal than

the basis of the workpiece, since in the heated state of the part from a soft metal does not provide the necessary pressing force and pushing through the spinneret. In addition, sTiDvf cannot be used to obtain bimetallic billets with local plating, for example, billets for working tools.

The aim of the invention / is to reduce the labor intensity and provide

10 manufacturing bimetallic products with local plating of a more solid metal than the base metal.

This goal is achieved by the fact that, in a known method, the assembly of a compound preparation is carried out by precipitating in the container parts of metal-c. less. with hardness up to full pressing into it of metal parts with greater hardness, placed in a container on the surface of a metal part with lesser hardness.

Claims (2)

The described method is illustrated by the scheme in which the moments are presented; Beginning of 73 precipitation (see Fig. 1) and pressed 1 (see Fig. 2). The heated billet consisting of qi of the LINPric part, 1, of extra soft metal, and 7 of a more solid metal, located on the surface of the part 1, is placed in container 3, covered by the cap 4 of the matrix unit 5. By moving npeco-i The stamp 6 carries out the sediment of the base part 1 and presses the parts 2 into the part 1. In this case, between the side faces of the parts 2 and the part 1, there is tight clean contact. After precipitation, the press stamp 6 is stopped, the matrix 7 is set by turning the matrix unit 5 in front of the container 3, and the press stamp 6 is further pressing the workpiece through the matrix, i.e. Pressure welding of parts 2 and parts 1, C. Whole reductions in oxidation of the surfaces of parts to be welded are preferably heated in a protective atmosphere. To secure parts 1 of part 2 to the surface, point welding or pitting can be used (in the placement of parts in the grooves of base 1). Pr and. M er. The proposed method was tested in the preparation of bimetallic rods with a diameter of 30 mm mm, intended for the fabrication of shims. The cylindrical base of the workpiece was made of KZ steel of 4XX grade, cutting elements were made of high-speed steel R6M5. The billet was heated up to the slider in a chamber electric furnace in argon, sludge and pressing on a hydraulic press of the model PV743. The diameter of the billet base was equal to 8 mm, the internal diameter of the container was 1 mm. For the convenience of placing cutting elements on the surface of the base during assembly of the billet, the cylindrical base was made with longitudinal grooves whose depth did not exceed half the height of the cutting elements. The fastening of the cutting elements in the grooves of the base was carried out by sod. As a result, a bimetallic bar with a local high-speed steel poster was obtained that was significantly harder than the base material, with a significant reduction in labor intensity. The use of the proposed method of semi-bi-metal bimetallic rod with a mixture of purulent plating provides, in comparison with existing methods, the following advantages: - saving of cladding materials in the manufacture of products with local plastering, for example, bimetallic cutting tools; - reducing the labor intensity of the manufacture and assembly of the workpiece; - eliminating the need for sealing of welded surfaces. The invention The method of manufacturing bimetallic products by heating, cleaning the contact surfaces and assembling metal parts with different hardness into a composite billet, and then compressing the composite billet from the container - through a matrix, characterized in that, in order to reduce labor intensity and to ensure manufacture of bimetallic products with monthly plating, the assembly of the composite billet is carried out by precipitating in the container parts of a metal with a lower hardness to complete pressing and in it from metal parts with greater hardness, placed in a container on a surface of metal parts with lower hardness. Sources of information taken into account in the examination 1. S. Golovanenko and L. Meandrov. Production of bimetals, M ,, Metallurg,% 1966, p. 24O-241. 2. New progressive technological processes for the production of pipes from non-ferrous metals and alloys Collected Color Metinformatshsh, (prototype). Fy Figg