SU980962A1 - Production line for producing bimetal - Google Patents

Description

The invention relates to powder metallurgy, in particular, to technological lines for the production of bimetal. -

Closest to the invention, the production line for the production of bimetra contains an unwinding bardbahn, a proper device and a device for forming a working powder layer consisting of a rolling mill and a sintering furnace 11.

The disadvantages of the line are the impossibility of obtaining uniform coatings from heterogeneous mixtures of flakes, due to the different electrophysical properties and specific gravities of the components, the low quality of adhesion of the layers due to the absence of intermediate layers and one of the main types of engagement - mechanical and the impossibility of obtaining significant coatings due to no thermomechanical processing with high temperatures.

The purpose of the invention is to improve the quality of the bimetal and expand the technological capabilities of the line.

The goal is achieved by the fact that a bimetal production line containing unwinding rolls, a proper device and a device for forming a working powder layer consisting of a rolling mill and a sintering furnace, supplying with a welding machine placed between the unwinding drum and the right device, installed after the last device for the preparation of the rolled and for the application of the intermediate layer, an additional correct device and a device for cross-cutting, than the device for preparation of the rolling stock is made in the form of profiled rollers, cleaning brushes and surface degreasing apparatus; and the rolls of its rolling mill are made calibrated, and the additional correct device and cross-cutting device are placed after the devices to form the working layer.

The drawing shows a process line.

The line contains an uncoiler 1, on the drum of which there is a steel strip 2, butt welding machine 3, the correct device 4 with contact rollers 5. A line preparation device is inserted in the line, including profiling rollers b, rotating wiper brushes 7 and

; I-degreasing 8. The device for forming the intermediate layer consists of a metering unit 9 (bun.), Equipped with a relief device 10 and a continuous sintering furnace 11. It is followed by a device for forming the working layer, including an electromagnetic tension apparatus 12, rolling mill 13 with inclined cylinders, calibrated rollers 14, metering hopper 15, scattering rollers 1 b and outlet, armature 17 and sintering furnace 18. Then an additional correct device 19 and device are installed operechnoy cutting 20 equipped with a carbide cutter 21. The linear dimensions of the groove and protrusion shaping rolls are calculated according to the dimensions of the contact plate and the substrate are shvelleroobrazny profile angles to the bottom sides caused by the conditions of forming the substrate and subsequent contact plate configuration. The linear dimensions of the roll gauges are calculated on the basis of the configuration and dimensions of the contact plates, and the angles of inclination of the sides to the base are determined by the conditions for the best extrusion of the plates from a closed gauge.

Lini works as follows.

The steel strip 2 s of the unwinder 1 is fed to the butt welding machine 3 and then to the correct device, 4 with contact rollers 5. The next operation of the process is to start a steel roll of a channel-like profile. Steel strip is passed through profiling rollers b. The steel profiled roll is then cleaned with rotating steel brushes-7 to remove oxides and various foreign build-ups. The cleaned tackle falls into the degreasing unit -8. The latter is a sealed container with carbon tetrachloride. The strip thus prepared is supplied to the metering unit 9 and the relief tool 10. The metering hopper creates an intermediate layer that is formed from sintering active powders (e.g., carbonyl nickel or jelly). The height of the layer lay 0.5 - (1.5 + 0.1) mm

To improve the adhesion of the working layer to the steel base, a surface is created on the surface of the intermediate layer.

the relief with the aid of a device, which is a series of periodically repeating cells with a difference of protrusions and depressions up to 3 mm, which is formed from a layer of powder previously poured into a steel base. A steel profiled roll with a deposited intermediate layer enters the baking 11 baking furnace 11 with a protective atmosphere —J (hydrogen).

The sintering temperature is 1100-20 ° C, the residence time in the furnace is 4-10 minutes.

Next, a tackle with a sintered intermediate layer, passage through an electromagnetic tension apparatus 12, which serves to guide the movement of the steel base into the closures caliber, enters the rolling mill 13 with calibrated rollers 14, metering hopper 15, tipping rollers 16 and outlet valves 17 The metering hopper contains an anti-friction blend used to form a working layer, for example, a mixture of composition 85% Fe, 14% Cu, 1% N1. The calibrated rollers 14 form a closed caliber in which rolled products are formed with the profile of the finished plate. In order to maintain the stability of the properties along the length and width of the rolled product, it is necessary to satisfy the condition of constant bulk density of the mixture. Pattern (rolling in the burrs, removed by the rollers 16 installed at the exit of the rolling mill. The scattered powder is sifted and re-enters the metering hopper 15. Next, the formed bar enters the through sintering furnace 18 with a protective atmosphere (hydrogen). Sintering temperature 1080-1100 - 20С, time of rolling in the heating zone is 5-10 ± 1 min. Upon leaving the furnace, the sintered bimetallic strip through the correct device 19 enters the moving cross-cutting device 20 equipped with erdosplavnoy cutter 21, where the cutting stripes are continuous at the measuring segments 600 - (1200 + 2) mm.

Claims (1)

The line provides products with high mechanical properties and strong adhesion of the working and carrier layers (impact strength is 1 - 1.2 kgM / cm, flexural strength is 19-21 kg / mm), the possibility of obtaining bimetals is steel composite material of various composites and metals, the formation of bimetallic plates in a rolling mill with a closed caliber and the conditions of all-round compression, which arise in this case, make it possible to manufacture plates with a uniform distribution of properties along the length and width and increase in a honeycomb up to 12 mm, which extends their service life by 2.8 times; the production of plates in the system of a continuous technological cycle makes it possible to obtain plates of almost any length (in this case, their length is from 600 to 1200) The capacity of the line is 500 thousand plates per year with a length of each plate 600 mm Claim of the invention Technological line for the production of bimetal containing an unwinding drum, the correct device and a device for forming a working powder layer consisting of a rolling mill Sintering furnaces, which, in order to improve the quality of the bimetal and expand the technological capabilities of the line, are equipped with a junction machine, placed between the softening drum and the correct device, located after the last device for preparing the rolled strip and for applying an intermediate layer , an additional correct device and a cross-cutting device, moreover, the device for the preparation of a roll is made in the form of profiled rollers, cleaning brushes and a degreaser The surface, the device for applying the intermediate layer is made in the form of a batching unit with a device for creating relief and a continuous sintering furnace, the device for forming the working layer is equipped with an electromagnetic tension unit and the rolls of its rolling mill are calibrated, and the additional correct device and cross-cutting device are placed after the device for forming the working layer. Sources of information - taken into account in the examination 1. Patent of England 1214158, cl. ; 7D, op gblik. 1U70.