SU1458081A1 - Method of compacting articles from powders - Google Patents

Abstract

The invention relates to methods for producing articles from powders, preferably welding and filler wires from metal powders. The aim of the invention is to reduce the consumption of materials. ;; obtaining a welding or filler wire of the required chemical composition; the capsule is filled with a mixture of powders so that the total content of each chemical element in the mixture, taking into account its content in the material of the capsule, corresponds to its content in the finished wire. Capsule vacuum, sealed, then subjected to extrusion, deformation and cold drawing. The operation of removing the capsule shell is eliminated, the yield to the product is increased, and the consumption of materials is reduced, i Cp. f-ly, 1 tab. (L

Description

one

The invention relates to powder metallurgy, in particular to methods for manufacturing articles from metal powders, and can be used primarily for the manufacture of welding and filler wires.

The aim of the invention is to reduce ;; consumption of materials.

In order to obtain a welding or filler wire of the required chemical composition, a mixture of powders is filled into the capsule, observing the condition

   + Z: Q ..

t iL h iri:

where Q; Q - respectively, the mass obtained after - extrusion of the rod, the capsule shell and

but

 P

To the n-th component of the mixture, kg;

respectively, the mass fraction of the i-ro element in the rod, in the shell of the capsule and in the nth component of the mixture; coefficient taking into account Jup (its loss of shell metal into scale when heated.

. The powder mixture filled to the ampoule is evacuated, sealed, heated and extruded, the front and rear caps are removed, heat treated, reheated and rolled to obtain a rod 6–8 mm in diameter, the rod is cold drawn to a wire of the desired size.

Example. To obtain welded wire of brand Sv10X19N23G2M5FAT with an average mass fraction of elements,%: C - 0, .3; MP - 2; Si - 0.5; Cr - 19; Ni — 22; Mo - 5; V - 1; Ti - 0.5, use a capsule with a diameter of 320 mm, a working space of 700 mm and a wall thickness of 10 mm. The shell is made of St K), the shell mass is 53.5 kg, the content of elements in the shell, kg: C 0.054 J Mp 0.27; Si 0.15; Cr 0.05; Ni 0.1, the rest is iron. The capsule is filled with purified waste from the abrasive cleaning of blanks from steel 12X18H10T in the amount of 180 kg, the content of chemical elements in the waste is, kg: C 0.18; Mp 2.7; Si 0.54; Cr 34.2; Ni 18; Ti 0.9. To match the chemical composition of the wire to the required content of the elements, the scraping waste is mixed until a homogeneous mass is obtained with graphite powder in the amount of 0.017 kg, manganese — 2.05 kg, silicon — 0.3 kg, chromium — 13.5 kg, nickel — 37 , 1 kg, molybdenum - 12.5 kg and vanadium - 2.51 kg, total weight of the mixture of powders is 248 kg. The capsule is filled with the mixture obtained and compacted mechanically, with a filling density of about 65% being achieved. The capsule with the powder is sealed by welding the front and rear: 1 ry krshek, heated to 1,150-1,180 (; and extruded on a horizontal hydraulic press with a force of 90–808 mm).

PAF in the amount of 247 kg, nopoDioK titanium in the amount of 1.0 kg is added, compacted, sealed and extruded, after extrusion, the front and rear clamps are cut, the capsule shell with a mass of 53.5 kg is removed, the rods are reheated, rolled and drawn to wire. (О The results of the comparison of the proposed and known methods are given in the table.

15

20

25

thirty

35

As can be seen from the table, the proposed method makes it possible to obtain welding and filler wire from powders of predominantly simple chemical composition using waste from stripping rolled steel billets from alloyed steels, while saving about 748.5 kg / ton of alloy steel powder and 9U, 2 kg / ton metal shell.

Claims (2)

1. A method of manufacturing products from powders, mainly welding and filler wire, including pouring steel powder into the capsule, vacuuming, sealing the capsule, heating and extruding into rods, characterized in that, in order to reduce the consumption of materials, the capsule is made of steel, containing. At least, several chemical elements of the composition of the resulting wire, before filling the capsule pore. steel shock is mixed with powders of alloying components, and the total five 0 five 0 five As can be seen from the table, the proposed method makes it possible to obtain welding and filler wire from powders of predominantly simple chemical composition using waste from stripping rolled steel billets from alloyed steels, while saving about 748.5 kg / ton of alloy steel powder and 9U, 2 kg / ton metal shell. Invention Formula I 1. A method of manufacturing products from powders, mainly welding and filler wire, including pouring steel powder into the capsule, vacuuming, sealing the capsule, heating and extruding into rods, characterized in that, in order to reduce the consumption of materials, the capsule is made of steel, containing. At least, several chemical elements of the composition of the resulting wire, before filling the capsule pore. steel shock is mixed with powders of alloying components, and the total that in the mixture and in the material of the capsule corresponds to the specified content in the resulting wire, and after extrusion, they are reheated, pro- 100 mm, after extrusion in rod 40, the content of each chemical element is removed the front and rear parts (front and rear covers), is reheated to 1160-1180 C and rolled in mill 250 to a rod 6 mm in diameter, which is subjected to cold 45 roller and drag. 2. The method of pop. 1, which differs from the fact that, as one or several components of the mixture, the waste of abrasive particles cleaned by grinding wheels of rolled products is used. dragging until a wire of the required size is obtained. Welding wire is produced in the same way using a known method, the capsule is filled with metal powder steel Sv10x19n23g2m5. 50 that in the mixture and in the material of the capsule corresponds to the specified content in the resulting wire, and after extrusion, they are reheated, pro- the content of each chemical element and drag. Known 248 Suggested 68 53.5 247 1004 216.6 180 53.5 301.5 255.5 117, A