Method of manufacturing a composite wire for additives in out-of-furnace treatment of liquid steel
(57) Abstract:Use: for the manufacture of filler wire. Creature: the method consists in obtaining bimetallic wire imposition of aluminum tape on the calcium core with welded longitudinal seam of the shell pressure; twisting of bimetallic wire multiconductor cable and seal the compression in roller portages; overlay steel shell on compacted wire drawing tape and rope in portage, rotating around the axis of the lug. Seal cable perform compression on 20-27% of the area of a circle describing the cross section of the cable to seal, and the core is additionally placed at least one strand of the alloying metal. 1 C.p. f-crystals, 5 Il. The invention relates to the field of out-of-furnace treatment of liquid steel by the introduction of its refining and alloying additives, more precisely to a method of manufacturing a filler wire.Filler wire may be made of a single metal (e.g. Al), two or more metals (such as Ca/Al Ca/Al/Fe) of powder materials in a metal shell (such as silico-calcium in the steel shell and others ). Each type of wire has its advantages and disadvantages, and track the speaker of calcium, aluminum and steel.To provide the desired percentage composition and the optimal allocation of components in the cross section of the wire serves a wire consisting of a bimetallic lived calcium aluminum shell, curled in a multi-channel cable, which is sealed and enclosed in a steel shell.This design allows: to reliably protect the metal calcium from environmental influences during long-term storage and transportation; to produce a wire with different percentages of components; to provide the most efficient, in terms of the interaction with the machined steel, the layout of active metals.If necessary, some lived Ca-Al can be replaced veins of metals alloying elements (Nickel, copper, niobium, etc.,) that will turn the wire in alloying.In Fig. 1 depicts a cross-section selegiline wire; Fig.2 is a section devyatnadcatiletnie wire; Fig.3 scheme of production of bimetallic wire calcium-aluminum; Fig.4 scheme seals stranded strands in the horizontal and vertical planes; Fig.5 the scheme of forming a composite wire.Bimetallic kalliwoda with radiating device, and after cleaning three metal brushes comes in a transaction bending rollers, where it is combined with the tape.Aluminum tape, bare on the one hand, is formed by the rollers around the core in a trough-shaped profile. The next pair of rollers deformative tape wrapped with an allowance for welding. Welding the longitudinal seam of the shell is cold deformation only part of the allowance for 65-69% in the non-driven rollers. The resultant welding Burr disk is removed with a knife.For hardening of the weld and improve shell core, the shell is heated by an alternating current from the contact rollers and the wire is calibrated by drawing through horizontal and vertical roller portages.Bimetallic wire is interwoven into the cable 7, 19, or any desired number of strands. When twisting the rope passes through two pairs of non-driven rollers with grooves systems circle-oval-circle (Fig.4) where is crimped in the horizontal and vertical planes.The total deformation 22-27% of the area of a circle describing the cross section of the cable to seal provides a seal up TO395-98% and thereby not only removes air from the space between the natural steel tape stretches across the rummaging. When this tape is folded in the casing pipe, tight rope core. A tight fit of the shell to the core is ensured by the fact that the cross-sectional area of the tape should be 5-15% higher than the cross section of the shell. For this purpose, the width of the ribbon is taken by 5-15% more than estimated. Failure to do so results in the breakage of the shell, or to incomplete closure of the slit longitudinal seam of the shell.Avoid stiffening of the metal edges of the tape with the surface of the working cone drawing dies, dies should be rotated around the axis of the lug to continuously update contact points in the zone of deformation. 1. Method of manufacturing a composite wire for additives in out-of-furnace treatment of liquid steel, consisting in the imposition of a steel shell on the core metal is more active than iron, aluminum shell, characterized in that as the core use of the n-th number of bimetallic wires woven into the rope, compressed, with a total deformation 20 27% of the original cross-sectional area of the two pairs of non-driven rollers with grooves systems circle oval circle and overlapping steel shells together to carry out the drawing of a ribbon of steel and core rummaging through rotating about at least one strand of the alloying metal.
FIELD: plastic working of metals, namely processes for producing semi-finished products by extrusion.
SUBSTANCE: process comprises step of placing blank in container of press, creating in it compression stresses sufficient for pressing out metal through die hole; pressing out metal from die hole at applying tension to extruded part of product; placing in front of blank additional pad made of metal whose deformation resistance is no less than 1.1 of tension stress value and is no more than 0.9 of deformation resistance value of blank metal at temperature and rate of extrusion process. At extrusion welding mode of metals of blank and additional pad is achieved. Volume of said pad is determined according to given relation: Vm = lbl x F1 where lbl -length of extruded part of blank sufficient for creating tension; F1 - cross section area of extruded part of blank. Tension is applied after pressing out pad metal to extruded part of blank formed of metal of said pad.
EFFECT: lowered peak load of press drive, reduced nominal effort of press.
2 cl, 2 ex, 4 dwg
FIELD: plastic working of metals, possibly manufacture of bimetallic articles having blank of envelope with bottom portion, blank of core and bottom portion with cylindrical part.
SUBSTANCE: apparatus includes hydraulic press with control system, unit for calibrating built-up blanks and pneumatic cylinder with control system. The last includes compressed air distributor, two pneumatic throttles and additional switch. The last is electrically connected with compressed air distributor and it is connected between limit switches of press control system. Calibration apparatus includes mounted on table of press: housing, lower die, stripper, guiding sleeve and punch mounted in movable plate of press. Pneumatic cylinder is mounted in lower part of press housing port coaxially to slide. Rod of pneumatic cylinder moves through working table of press, through stripper and lower die of calibration apparatus. Detachable tip is secured to end of said rod and it has flat end with land whose diameter is no less than diameter of cylindrical part of bottom portion of built-up blank.
EFFECT: improved quality of produced articles.
SUBSTANCE: invention relates to method of manufacturing the platinite wire and can be used in electrovacuum and semiconductors. Method includes composition preshaping made of ferro-nickel core and copper envelope, blank heating up to the temperature 850-920°C with following plastic deformation up to defined wire finite size. After the plastic deformation wire surface is cleared and treated by surface-active agent, in the capacity of which it is used 0.25% water solution of boric acid. Then wire is reheated till the temperature 900-950°C in pusher-type furnace, in restricted space of which it is formed medium with partial pressure of the oxygen no more than 10 mm of mercury. Then heated wire is oxidised in the atmosphere and sequentially cooled in steam-air and vapour-water mediums. Additionally time of wire oxidation in the atmosphere is regulated depending on standardised thickness and content of wire oxide layer.
EFFECT: improvement of wire ensured by formation on its surface cuprous layer with regulated thickness and content.
SUBSTANCE: invention refers to methods of metal cord treatment by means of high frequency induction discharges under conditions of dynamic vacuum. The method consists in effecting surface of metal cord with low temperature plasma created in a flow of plasma generating gas. The process is carried out in the discharge chamber by means of supply of voltage to electrodes connected to a high frequency generator at 13.3-26.6 Pa pressure in the discharge chamber and 0.6-1.1 A current strength on the anode of the generator. Effect with low temperature plasma lasts for 15-30 sec. Plasma generating gas consists of mixture of 70 % argon and 30 % hydrogen; consumption of the mixture is 0.06-0.12 g/sec.
EFFECT: improved adhesion of rubber to metal cord, increased automobile tire life.
1 dwg, 2 tbl