SU768111A1 - Method of welding by laser beam - Google Patents

Abstract

1. WELDING METHOD BY LAZE-RA BEAM, mainly through optically transparent material, in which the transparent material is preliminarily.;. . -f; jTf | vi j: .U- - apply an alloy coating and install a transparent material with a coating to the parts to be welded, characterized in that, in order to simultaneously alloy the weld metal and reduce evaporation of the coating, a transparent material is pressed coated to the parts to be welded, and the coating itself is applied in several layers of different thickness. . 2. Method POP.1, characterized in that, with the aim of regulating the concentration of LTE components in the weld metal, the coating is made discrete.

Description

The invention relates to the field of welding materials with a laser beam.

A known method of local coating on the surface of the parts, in which the substance must be applied to the part, pre-impregnates onto the transparent substrate, then install this substrate with a coating to the treated part I. by exposure to a beam, the coating over the translucent substrate melts and evaporates it. . . ;

Known qnoco6 laser beam on the workpiece through an optically transparent material with a deposited coating - which is turned in the direction of machined parts. , . -. However, the known curbs are designed to obtain a thin-film pattern or to eliminate defects (punctures, creases) of the film-like image. Moreover, the transparent substrate with the applied coating is installed at some distance from the surface of the part being machined, since otherwise there will be no sputtering of the evaporated surface of the laser beam over the surface of the part.

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The known methods are not applicable for welding, in addition, coatings applied to the substrate are metal monolayer.

In order to simultaneously weld the weld metal and eliminate evaporation of the undercoat, the transparent coated material is pressed against the parts to be welded and the coating itself is applied in several layers of different thickness. In order to control the concentration of the lightening 11X components in the weld metal, the coating is made discrete. - - -bi -4Hv - - --- -4 The coating applied may be opaque translucent and opaque and applied to optical fibers I-ff i KH3tt weti, f. "i.t 1st ki translucent material. The coating can be applied in several layers, and the optical properties of the papsules are J. WMv4 i; KS fS ". only on the spatial position of the zone of interaction of the beam with a substance,. «, g. ; . . Fig. 1 shows a welding method using a continuous coating; FIG. 2 shows a welding method with a discrete coating. A clamp (substrate) 1, filled with an optically transparent opaque matrix, is coated with coating 2 (one OR slightly), allowing le rltlpbBafb a seam 3 soydm emsh of parts 4 and 5. h, -. .-, The essence of the method is as follows. In welding, the light beam is actually thermally externally optically transparent. , .- (J clamp (substrate} I, installed on welded children 4, 5, and melts almost simultaneously yak (. - 1,, - chd mk avgtg coating 2, and welded edges of parts). After solidification, a weld is formed 3, doped eLe ... entering the coating, which makes it possible to obtain a seam with an anemia with the following properties: {1: -. - CH If the coating is optical; Plasma is; IT melts from the heat of 11 baths. If the surface is semitransparent, then Partially melt directly from the laser beam, d chaGiC: but from the heat of the welding fluid, In the case of using an optically transparent coating, one of those}) at the last hub is a beam of a laser. TRUEYE This is the weld doping stitch; the weld with non-alternating parameters of the welding modes is pressed by the thickness of the substrate. -T6J ftYfil op coating of opaque coating is large) a6 at the penetration depth of this S «# -G-, SSSci-f v V -V te i, fr 7X - by welding beam, heating and melting of the welded part occurs indirectly - due to heat transfer from melted layer of coating. This can be useful for metals with high vapor pressure (zinc and its alloys), and for soldering purposes. The proposed method makes it possible to apply the coating both in a continuous layer and in advance for a given pattern corresponding to the future spreading of the seams or points, and to use the clamp simultaneously as a template and as a three-way device that ensures rtptfifef Hne of the parts to be welded to each other and fix them in position. The use of the pre-applied method allows the 11girov1Sh paths to produce welds or points with predetermined properties (at ni) 64k oCTH, hardness, ductility, etc. ), compensate for the use of JierHpytoinJix components from the zone. Allows you to change the surface connection of the processing of the yaaFa rala, thereby improving the mecha nism on: the surface, which provides 1 3 the primary cost of material of special materials with its own. &Amp; And the properties. - The previous method was tested with a bonnet of X18H10T steel bellows assemblies on a laser unit for welding quantum-16. Amount: The thickness of the billowed section is 0.4 mm. As a cover, on a quartz glass and a chromium layer with a thickness of 30 mime. ,,. Metallographic tests have shown that when using the pre- This welding method did not have intergranular crystals in the seam and grain boundaries, since the depletion of chromium boundaries during welding using conventional t & bblogs was compensated by introducing chromium% ffic - teFffes under this steel, as a result, the corrosion rate decreased by 1.5 times. - - Sveglrvoy U

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Claims (2)

1. METHOD OF LASER BEAM WELDING, mainly through an optically transparent material, in which an alloying coating is preliminarily applied to the transparent material and the transparent material is coated with the parts to be welded, characterized in that, in order to simultaneously alloy the weld metal and reduce the evaporation of the coating, the transparent is pressed material coated to the welded parts, and the coating itself is applied in several layers of different thicknesses. 2. The method according to claim 1, characterized in that, in order to control the concentration of alloying components in the weld metal, the coating is made discrete. e