SU21444A1 - Rods for applying tungsten carbides and their alloys with other carbides and metals on the surface of tools - Google Patents

Description

Exceptional hardness, excellent cutting ability and high

The resistance to wear of tungsten carbides and their alloys with other carbides and metals opens up great opportunities for increasing productivity, increasing machining speeds, reducing wear — all kinds of ma-. tire parts and tools. The high cost of solid carbide materials and their brittleness, resulting in low resistance to the impact and bending forces to which machine parts and tools are subjected, however, necessitates making tools not entirely from such solid materials, but only depositing solid materials. to the most critical places (cutting edges, rubbing surfaces, etc.). tools made of materials commonly used in mechanical engineering, (iron, steel) Such application of hard alloys is usually carried out in such a way that pieces or plates of hard materials are attached to machine parts and tools using clamping, caulking, soldering, etc. a number of known flaws that prevent the full use of the valuable properties of solid material. The subject of the present invention i are rods allowing pro. | to harass hardbanding

arc or autogenous methods, just as conventional hard welding is performed with stubble.

In the schematic drawing of FIG. Figure 1 shows pulling a strip of metal through an opening to turn it into a tube; FIG. 2 - filling a solid material into a tube; FIG. 3 — pulling the tube with a solid material poured into it to give it a final shape, FIG. 4 - the same, the second option.

Tungsten carbides and their alloys with other carbides and metals are enclosed in a crushed state in a shell made of a material corresponding to or close to that on which they intend to apply a layer of solid material. Cases in the form of a tube can be made rods like rods for autogenous or electrodes for arc welding and can be applied in the usual way to apply in this case special solid materials on the surface of tools or machine parts. With a current of sealing, the material of the plapspus shell is scraped over by the enclosed pieces of solid material and fused with the material of the body of the tool or machine part on which the welding is performed. , Falling asleep hard alloy pieces

in whole pipes were expensive and uncomfortable. Therefore, to manufacture the above-mentioned rods, a strip of metal A should be pulled through one or several holes B of its bending in this way into tube B. This tube B is filled with solid material D and then passed through one or more of them.

a few holes of Dto shape that you want to give to the rod (Fig. 1-3). In the second variant, a strip of metal A is pulled through opening B, thus folding it into groove B. In this groove C, solid material L is poured, and the groove is again pulled through one or more holes D of the required shape (Fig. 4b).

In both cases, to prevent precipitation of solid material, the ends of the rods are closed by flattening, melting, caulking or gluing; , -; ; ..,: ,, ,,.,. . .- :. ..

P | edmet of the invention.

Claims (2)

1. Rods for deposition of tungsten carbides and their alloys with other metals and metals and the surface of tools and machine parts by means of autogenous or arc welding, characterized in that they consist of the aforementioned solid materials enclosed in a metal sheath in the form of a tube. 2. A method of manufacturing rods according to claim 1, characterized in that a strip of metal A is pulled through one or more holes E, a fold in the forch of a tube or a groove 2j, and a solid one inserted into the tube enclosed in paragraph 1 is poured into said tube or groove B the material and then this tube or groove are again passed through one or more JX holes of the shape that they want to give to the rod J , // phag5 Fig2 7Wr . f1lgA f gb