A Method of Improving the Efficiency of Vacuum Electron Beam Sealing and Welding of Multilayer Slabs

A vacuum electron beam and slab technology, which is applied to electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problem that the welding seam of the sealing and welding blank is easy to crack, and the stacking and sealing and welding operations cannot be carried out at the same time, which affects the sealing and welding problems such as billet production efficiency, to improve efficiency, reduce the risk of weld cracking, and improve internal quality

Active Publication Date: 2022-05-31
SHANDONG IRAETA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a method for improving the efficiency of vacuum electron beam sealing and welding of multi-layer slabs, which can effectively solve the problem that the stacking and sealing operations cannot be carried out simultaneously in the existing multi-layer slab vacuum sealing and welding process, which affects the sealing The production efficiency of welding blanks, and the problem that the weld seam of sealing welding blanks is easy to crack

Method used

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  • A Method of Improving the Efficiency of Vacuum Electron Beam Sealing and Welding of Multilayer Slabs
  • A Method of Improving the Efficiency of Vacuum Electron Beam Sealing and Welding of Multilayer Slabs

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Effect test

Embodiment approach 1

[0058] The material of the sealing and welding blank is low-alloy carbon steel, and the number of layers of the sealing and welding blank is 9 layers. Spot-weld the stacked blanks using MIG gas shielded welding, the shielding gas is 100% Ar gas, and only the short side of each layer of blanks is spot-welded, and each short side is spot-welded at 3 places, evenly distributed, and each place is spot-welded Length≤10mm. The overall size of the stacked blanks after spot welding is: width 1600mm×length 2180mm×height 2645mm.

[0059] Lift the spot-welded blank as a whole on the rotating platform of the vacuum electron beam welding machine. In order to ensure that the interface of the spot-welded blank is parallel to the axis of the electron beam, the lower surface of the first slab has been milled, and the lower and upper surfaces of the first slab Level deviation ≤ 0.20mm, lower surface roughness reaches Ra6.3. The spot welding blank is placed on the 4 equal-height pad irons on t...

Embodiment approach 2

[0065] The material used for sealing and welding blanks is austenitic stainless steel, and the number of layers of sealing and welding blanks is 13. The stacked blanks are spot welded by MIG gas shielded welding, the shielding gas is 100% Ar gas, only the short sides are spot welded between adjacent blanks, and each short side is spot welded at 2 places, evenly distributed, and each place Spot welding length ≤ 10mm. The overall size of the stacked blanks after spot welding is: width 1130mm×length 1530mm×height 2509mm.

[0066] Hoist the spot-welded slab as a whole on the rotating platform of the vacuum electron beam welding machine. In order to ensure that the interface of the spot-welded slab is parallel to the axis of the electron beam, the lower surface of the first slab has been milled, and the lower and upper surfaces of the slab are horizontal Degree deviation ≤0.20mm, lower surface roughness reaches Ra12.5. The spot-welded slab is placed on the 4 equal-height pad iron...

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Abstract

The present application discloses a method for improving the efficiency of vacuum electron beam sealing and welding of multi-layer slabs, comprising the following steps: (1) milling the lower surface of the first slab; (2) setting a slab stacking platform, Place the first slab on the slab stacking platform, and stack several slabs of the same size on the first slab in order to make stacked blanks; (3) pair adjacent slabs in the stacked blanks The blank is spot-welded to make a spot-welded blank; (4) place a backing iron on the rotating platform, hoist the spot-welded blank as a whole on the rotating platform, close the welding chamber of the vacuum electron beam welding machine and vacuumize the spot-welded blank The adjacent slabs are welded in sections to obtain segmental welded blanks; (5) The vacuum electron beam welding machine is used to weld the forged and welded blanks as a whole to obtain sealed welded blanks. The method disclosed in the present application can effectively improve the sealing and welding efficiency of the slab, and can ensure that the quality of the welding seam of the slab can meet the forging requirements of the sealing and welding blank for large forgings through spot welding, section welding and overall welding.

Description

technical field [0001] The invention belongs to the technical field of sealing and welding, and in particular relates to a method for improving the efficiency of vacuum electron beam sealing and welding of multi-layer slabs. Background technique [0002] The multi-layer slabs are sealed and welded together by vacuum electron beam welding to form a welded blank, which can be used to produce large forgings after being heated and forged. The existing stacking process of multi-layer slabs before vacuum electron beam sealing and welding is carried out on the rotary platform of the vacuum electron beam welding machine. Vacuumizing and sealing welding operations cannot be carried out at this time. And when vacuumizing and sealing welding, the rotary platform must be driven into the welding chamber and the door is closed, and the stacking operation cannot be carried out at this time. The more layers of the sealing and welding blank composed of multi-layer slabs, the longer the sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/06
CPCB23K15/06
Inventor 李敏任秀凤银伟赵丽美刘晋李玲申振赵继浩赵兴明赵方娜
Owner SHANDONG IRAETA HEAVY IND
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