Method for welding high-strength steel through laser welding machine

A welding method and laser welding machine technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as fracture, affecting the normal production of the unit, and broken belts

Active Publication Date: 2014-01-29
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

The welds welded by this welding process can be judged and analyzed from the weld quality detector QCDS to meet the production requirements. The quality of the destructive back protrusion test on the testing machine for checking the quality of the weld seam at the deformed part of the bulge is also n

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  • Method for welding high-strength steel through laser welding machine
  • Method for welding high-strength steel through laser welding machine

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Embodiment Construction

[0013] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] see figure 2 As shown, the welding method of the laser welder welding high-strength steel of the present invention specifically includes the following steps: clamping the strip steel to be welded, conventional shearing, and micro-movement of the lap table (allowing the clamping of the lap table clamp to be clamped by conventional shearing) Move the leading edge a little forward to determine the shearing amount of the secondary shearing, the moving distance can be set as 0.05mm~0.2mm), secondary shearing (cut off the micro leading edge protruding from the movement of the lapping table), lapping Lap joint, high-power air-through annealing (set the annealing power intensity at 60% to 80% according to the strength of the material, and convert the success rate to 6KW to 8KW, control the moving speed of the welding machine t...

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Abstract

The invention discloses a method for welding high-strength steel through a laser welding machine. The welding method includes the steps of clamping of strip steel to be welded, conventional shearing, slight moving of a lap joint platform to determine shear amount of secondary shearing, secondary shearing, butt-joint of the strip steel on the lap joint platform, high-power vacuum annealing, smoothening, compressed air cooling, preheating, pre-smoothening, laser connection welding, secondary high-power annealing, smoothening, welding finishing and the like. The quality of the shearing surface of the strip steel is improved through the secondary shearing; yield strength can be reduced through the high-power vacuum annealing, the plate form of the strip steel in the welding region can be effectively improved, and material grains can be improved; material of the strip steel in the welding region can be improved through the air cooling, and thus fracture of welding joints in a thermoinduction region can be effectively avoided.

Description

technical field [0001] The invention relates to continuous casting control technology, more specifically, relates to a welding method for welding high-strength steel with a laser welding machine. Background technique [0002] The welding machine of the acid tandem rolling unit in the cold rolling enterprise adopts a laser welding machine. When the acid tandem rolling unit produces high-strength steel with a strength greater than 80 kg, the laser welding machine adopts the following steps for welding: clamping the strip to be welded, conventional shearing The welding process of cutting, lapping of lapping table, pre-induction heating treatment, pre-leveling wheel leveling, laser beam conduction for welding, annealing device for annealing the weld seam, and post-leveling wheel for final leveling of the weld seam, see figure 1 . The welds welded by this welding process can be judged and analyzed from the weld quality detector QCDS to meet the production requirements. The qual...

Claims

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Application Information

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IPC IPC(8): B23P17/00B23K26/32B23K26/60
CPCB23K26/24B23K26/60B23P15/00
Inventor 陈杰王康健郑涛王晓峰
Owner BAOSHAN IRON & STEEL CO LTD
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