SU1570865A1 - Method of producing bimetallic billets - Google Patents

Abstract

The invention relates to methods for producing bimetal by fusion welding and the use of subsequent rolling. The purpose of the invention is to improve the quality of the bimetal obtained by subsequent rolling, increasing the productivity of the process and obtaining a joint on large surfaces. The plate to be welded 2 is rigidly fixed relative to the main billet 1 on two long sides using two reusable beams 5 that hold the plate 2 to be welded relative to the main billet using four crackers. Crackers are welded around the edges of this blank. With the help of union clamps and four wedges, the beams are fixed relative to the crackers. Then, welding is carried out with several arcs. Each arc welds its own seam section, and at the end of the section, in order to join the individual sections of the arc, longitudinal oscillations are made. To obtain a bimetal of responsible purpose, it is necessary to use welding materials that prevent the formation of brittle interlayers along the fusion line. 3 il.

Description

The invention relates to methods for producing bimetallic billets by fusion welding and using post-rolling to produce bimetallic sheets of the required thickness and can be used to produce a two-layer metal, mainly steels, using arc welding in a narrow gap with a meltable electrode in a protective gas medium.

from the middle to the edge of the blanks, and the arc D2 - from the edge to the middle. At the march speed, the electrodes are returned to their original position, and the welding cycle is repeated. After the formation of a multi-layer weld with a height of 50-60 mm, it is cleaned and the slag removed. The copper lining 10 is removed from the gap. A re-edging of the workpiece is made, the creep of the invention is set accordingly; the quality improvement is 10 to 11. The welding of workpieces on this side

the bimetal obtained by subsequent rolling, increasing the productivity of the process and obtaining compounds along large surfaces.

FIG. 1 shows an installation for producing bimetallic blanks, vertical projection; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. one.

The method is carried out as follows.

removal of slag crust through 50-60 mm is completed. End seam formation is completed. Gas cutting 4 removes crackers. 15 Beams 5, clamps 8, wedges 9, copper lining 10 and slide blocks 11 are ready for reuse. The stops 6 are also cut off. Subsequently, the bimetallic billet is rolled.

Example. Production of bimetallic surface of massive plate 20 cooking from steels 09G2S + ОХ18Н10Т. The blanks 1 and the weld plate 2 to be welded are machined. Moreover, the surface treatment of the workpiece 1 is carried out with a slight slope (0.5-1 °) from the middle to the edges so that the edges of the workpieces from the long sides extend into the body of the workpiece by about 5-8 mm compared to the middle. In the middle of the plate surface thus treated, a steel melt lining 3 is grasped onto a side surface. Rusks are welded to the side surfaces on both sides of the bottom and top.

In the welded plate 2, up and down along the long side, stops must be welded or protrusions are provided for the beam 5, which in this case must also have a corresponding protrusion. The plate 2 in the middle part is closely mounted to the lining 3 stuck to the workpiece 1 so that the gap formed between the elements 1 and 2 in the upper and lower parts is the same. In this position, the plate 2 is fixed relative to the workpiece 1 with the help of brackets stuck from the sides of the elements to be connected in this way

measures of blanks from low- and high-alloyed metal 400X1000X15000 and 100ХУООХ1500 mm, respectively. The welding of blanks is carried out on surfaces with an area of 1000x1500 mm. For the purposes of welding, you can use the pilot-industrial apparatus AD-225. Welding is performed in a narrow gap 17–20 mm wide at CCI using wire Sv-08G2S. Welding mode: arc voltage 38–30–40 V, welding current 470–550 A, welding speed 13–16.3 m / h, arc welding up to 30 ° with transverse oscillations of the electrode. After welding, the workpiece is rolled by welding to a sheet of the required thickness.

To obtain a bimetal of responsible purpose, it is necessary to use welding materials that exclude the formation of brittle interlayers along the fusion line as a result of the development of diffusion processes.

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Claims (1)

Invention Formula The method of obtaining bimetallic billets, in which the parts to be welded Since the lugs 6, the plate 2 and the staples are additionally 45 are assembled with a gap, and welds are effectively formed sockets for the beams 7. Then, the beams holding it 5 are mounted on the ends and the bottom of the plate 2 and the crackers 4 are welded to the ends of the beams four collars 8. Between the balkan on both sides of a melting electrode in a protective gas environment, characterized in that, in order to improve the quality of the bimetal during subsequent rolling and increase productivity, before welding, osmi 5 and crackers 4 drive a wedge 9. 50 to the side surface ost The stops 6 to the plate 2 are recommended to be welded in place after installation and fixing of the beam 5. After this, the copper lining 10 is installed, and on the sides, at the welding site, sliders 11 for holding the liquid metal. Welding is then performed by moving the arcs in the direction of Ve. Arc d for example moves at working speed four crackers are welded, the plate being welded is rigidly fixed with respect to the workpiece on two long sides with two beams, then clamps are put on the ends of the beams and crackers, between the beams and 55 crackers a wedge is driven in, and welding is carried out in several arcs, each arc welds its own seam section and at the end of the plot makes longitudinal oscillations. from the middle to the edge of the blanks, and the arc D2 - from the edge to the middle. At the march speed, the electrodes are returned to their original position, and the welding cycle is repeated. After the formation of a multi-layer weld with a height of 50-60 mm, it is cleaned and the slag removed. The copper lining 10 is removed from the gap. The workpiece is re-edited and the creeps are set accordingly 11. Welding of the workpieces on this side with removal of slag crust through 50-60 mm is completed. End seam formation is completed. Gas cutting 4 removes the crumbs 4. Beams 5, clamps 8, wedges 9, copper lining 10 and slide blocks 11 are ready for reuse. The stops 6 are also cut off. Subsequently, the bimetallic billet is rolled. Example. Bimetallic production measures of blanks from low- and high-alloyed metal 400X1000X15000 and 100ХУООХ1500 mm, respectively. The welding of blanks is carried out on surfaces with an area of 1000x1500 mm. For the purposes of welding, you can use the pilot-industrial apparatus AD-225. Welding is performed in a narrow gap 17–20 mm wide at CCI using wire Sv-08G2S. Welding mode: arc voltage 38–40–40 V, welding current 470–550 A, welding speed 13–16.3 m / h, arc welding up to 30 ° with transverse oscillations of the electrode. After welding, the workpiece is rolled by welding to a sheet of the required thickness. To obtain a bimetal of responsible purpose, it is necessary to use welding materials that exclude the formation of brittle interlayers along the fusion line as a result of the development of diffusion processes. five 0 Invention Formula The method of obtaining bimetallic billets, in which the parts to be welded assembled with a gap, and welding is carried out from two sides by a melting electrode in a protective gas environment, characterized in that, in order to improve the quality of the bimetal during subsequent rolling and increase productivity, four crackers are welded to the weld before welding, rigidly fixed to the workpiece two long sides with two beams, then clamps are put on the ends of the beams and crackers, a wedge is driven in between the beams and crackers, and welding is carried out in several arcs, each arc welding its own section of the joint and the end portion performs longitudinal vibration. one 6 - Uev VM 14 // eight T m L2 //////////////////// X / 7 / G7 -J 6 YU 1 Buff a