SU123895A1 - Torch for surface alloying, surfacing and welding of metals - Google Patents

Description

A known burner for surface alloying, surfacing and welding of metals, introducing the alloying element in the form of powder through a flame from a hopper mounted on the handle of the burner.

In the described burner, in contrast to the known one, the alloying drip in the bunker is prevented from hanging and carried from the buoyer to the burner channels in the required quantity. This is achieved by using the energy of ambient air drawn in by an additional injector to apply coatings of thin thickness by autogenous treatment.

FIG. 1 shows a burner diagram; in fig. 2 - bunker, side view.

The barrel 1 and the tip 2 carrying the mouthpieces c are connected to the tee 5 by means of cap nuts 4, in the upper part of which there is a bunker 6 having regulating channels 7 for gas flows acting on the ferropowder in the bunker and channels for supplying a certain amount of powder . The amount of powder supplied is controlled by means of a movable ring with a handle 8. The tee 5 is equipped with a shut-off valve 9 and has a cavity in which the injector 10 with circumferential calibrated channels located in it to change the diameters of the gas jets, the velocity of the gas flows and the gas ratio powder.

The ferropowder from the hopper 6 is sucked in by the gas mixture and carried away through the mouthpieces 3, at the outlet of which the gas mixture is ignited.

The withdrawal from the quiescent state and movement through the channels of the powder particles is forced by means of directional air flow sucked by the injector 10 from the surrounding medium. Each subsequent portion of the powder is melted in an already molten metal. The powder is supplied not to the initial opening of the injector, but to pulse No. 123895-2 -

but to the opening of the displacement chamber into the flow of working gases. Thus, the powder from the hopper is carried away by the air flow sucked in by the injector through one of the calibrated holes at the base of the hopper, all the other holes being blocked by a movable ring with a handle 8.

The torch can be used for welding and surfacing of special steels using a low-carbon welding wire as an additive; for surfacing thick layers (3-5 mm) of wear-resistant coatings on the surface of parts made of low-grade (low-carbon) steels using an additive in the form of ordinary welding wire; for surfacing of thin layers (0.1-0.5 mm) of doped coatings without the use of filler wire, using only ferropowder.

In the process of burner operation, the distance from the burner to the part is recommended to be maintained at about 20-30 mm, which reduces the fading of the alloying elements.

Subject invention

A torch for surface alloying, surfacing and welding of metals, introducing the alloying element in the form of powder through the flame from a bunker mounted on the handle of the burner, characterized in that, in order to prevent the alloying lead from hanging in the bunker and ensuring its discharge from the bunker into the channels the burner in the required amount, the energy used is sucked in by an additional air injector from the environment for applying coatings of small thickness by the method of autogenous treatment.