SU1357170A1 - Method of manufacturing by pressure welding with heating up billets for cutting tool - Google Patents

Abstract

The invention relates to pressure welding with preheating and can be used in the tooling industry in the production of a combination tool reinforced with a hard alloy. The aim of the invention is to improve the quality of the compound. Layer-by-layer stacking of alternating elements (E) of structural steel, (CS) and cutting material, which is taken as a hard alloy powder, is made into the steel matrix. Preliminarily, a layer of nickel is deposited on the surfaces of the matrix to be welded and E from the CS. The first set flush with the edge of the matrix E of the COP. Then a layer of solid alloy powder is laid on it. It is pressed by the installed E from the COP with the help of the stem. The layering operation is repeated. The last flush with the edge of the matrix set E from the COP. The site is evacuated and its ends are sealed by fusion welding. The assembly is then installed in a gasostat, heated, and isothermally subjected to full compression. After welding, the resulting assembly is cut and a cutting tool consisting of a KS holder and a plate of hard alloy is obtained. The quality of the joint is enhanced by the fact that the processes of extrusion and diffusion of particles of a hard alloy with steel take place under high vacuum through an intermediate nickel spacer under conditions of comprehensive compression. 4 il. (L has eaten vj

Description

The invention relates to pressure welding with preheating and can be used in the tooling industry in the production of a combination tool reinforced with a hard alloy.

The purpose of the invention is to improve the quality of the compound.

FIG. 1 shows a flow chart of the method; in fig. 2 - welded billet; in fig. 3 is a section A-A in FIG. 2; in fig. 4 - received cutting tool.

In a steel matrix 1 (Fig. 1) layer-by-layer stacking of alternating elements 2 from structural steel and cutting material 3 is made, which is taken as a hard alloy powder. Previously, nickel layer 4 is deposited onto the surfaces of the matrix 1 and elements 2 of structural steel to be welded. The first set flush with the edge of the matrix 1 element 2 of structural steel. Then a layer 3 of a hard alloy powder is laid on it, pressed with the installed element 2 of structural steel using stream 5. The layer laying operation is repeated. Last flush with the edge of the matrix set the element 2 of structural steel. The assembled unit is installed in a vacuumized chamber (not shown), a vacuum is created in it and sealed by welding its ends with an electron beam (Fig. 2). The bag is then installed in a gas bath, heated, and an isothermal vortex is carried out under conditions of all-round compression with inert gas. After welding, the bag is cooled, removed from the gasostat, cut along section A-A (Fig. 2). The resulting blanks are cut into 4 parts (Fig. 3), producing a cutting tool (Fig. 4), consisting of a holder 6 of structural steel and a plate 7 of hard alloy, after the necessary sharpening and straightening, ready for use. The quality of the joint is enhanced by the fact that the processes of extrusion and diffusion of particles of a hard alloy with steel take place in high vacuum through an intermediate nickel spacer under conditions of comprehensive compression.

Example. Make the cutter with a holder of steel 35 and the cutting plate of hard alloy KB8.

The die-casting matrix is made from 35 square steel. Elements of structural steel are made of steel 35.

Then, steel blanks are degreased with carbon tetrachloride and a layer of nickel is applied to the surfaces to be welded.

I Into the matrix, layers of elements of structural steel and VK8 hard alloy powder are layered in layers, pressing a layer of VK8 hard alloy powder with a force of 10 MPa.

The assembled assembly is placed in an installation for electron beam welding of the UL-132 and when it is rarefied with an electron beam, its ends are welded.

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The sealed unit is installed in the installation chamber for all-round compression with inert gas at high temperatures, where a pressure of 20 MPa is created by supplying argon, heated before and held for 40 minutes. After welding, the pressure is released, the assembly is cooled, removed from the gas-stat and machined, cut into workpieces. The resulting hard-alloyed incisors are sharpened and straightened.

Claims (1)

35 claims A method for fabricating pressure welding with heating blanks for cutting tools consisting of conformational structural steel and cutting material, in which alternating elements of structural steel and cutting material are layered in layers in a steel matrix, 5, the first and the last elements of structural steel are installed flush with the edges of the matrix, the package is sealed by welding along the perimeter of their ends, and the elements are welded 50 by heating under conditions of all-round compression, and after welding the resulting assembly is cut into the required blanks, characterized in that, in order to improve the quality 55 compounds, a layer of nickel is deposited on the surfaces of the matrix and the elements of structural steel to be welded; a powder of hard alloy is taken as the cutting alloy, and it is pressed Baet-ibiM on it an element from the design package of its vacuum. FIG. i FIG. Incision Incision 6 t sh srig.Z Compiled by T. Olesova Editor N. Tupitsa Tehred A. Kravchuk Proofreader S. Cherni Order 5928/10 Circulation 970 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 .7 / Fig.