High strong weather resistance cold rolling container coating plate laser welding process

A laser welding and container technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as difficult welding effect, difficult assembly accuracy, and easy occurrence of spatter, so as to achieve easy and accurate positioning, simplify welding equipment, The effect of thermal deformation and small residual stress

Inactive Publication Date: 2010-12-08
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although laser welding technology has been applied to the welding of galvanized automobile sheets and other coated sheets, there are still some difficulties in directly applying it to the welding of high-strength weather-resistant cold-rolled container coated sheets, which are mainly reflected in the following aspects: (1) For For high-strength and weather-resistant cold-rolled container coated sheets, the coatings are mostly high-corrosion-resistant Al-Mg-Zn alloy coatings. Compared with ordinary galvanized sheets, the impact of this composition on the welding process is more obvious, and it is easy to appear Splashes, pores, cracks and other defects, so the control requirements for laser welding are more stringent; (2) High-strength weather-resistant cold-rolled clad

Method used

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  • High strong weather resistance cold rolling container coating plate laser welding process
  • High strong weather resistance cold rolling container coating plate laser welding process
  • High strong weather resistance cold rolling container coating plate laser welding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The high-strength weather-resistant cold-rolled clad plate used is the ZAM plate produced by Nisshin Company, the surface coating is Al-Mg-Zn coating (containing 6% Al and 3% Mg, and the rest is Zn), the thickness specification is 0.8mm, and the chemical composition of the substrate is as follows : C ≤ 0.15, Mn ≤ 0.9, Si ≤ 0.55, P ≤ 0.035; S ≤ 0.035; Ti: ≤ 0.15; Cr ≤ 1.2; Cu ≤ 0.5, the rest is Fe and unavoidable impurities. The mechanical properties of ZAM plates are as follows: Yield strength R p0.2 ≥335MPa, tensile strength R m ≥440MPa, elongation A≥18%.

[0047] Lap welding: before welding according to figure 1 In the design of the middle joint, the welding edges of the upper and lower coated plates 1 and 2 are respectively bent into a V shape with the tip facing upward. The bending angles are 120 degrees for the upper coated plate 1 and 150 degrees for the lower coated plate 2. The width of the bent part Keep the same, both are 8mm. After splicing the bending par...

Embodiment 2

[0050] The clad plate is the same as in Example 1.

[0051] Fillet welding: before welding according to figure 2 In the design of the middle joint, the welding edges of the upper and lower coated plates 1 and 2 are crimped respectively, the crimping angle is 90 degrees, the crimping width is 8 mm, and the rounded corners of the crimping 13 of the lower clad plate 2 are smaller than those of the upper clad plate 1 The curling 13 is rounded, and then the curling 13 of the upper and lower two coated plates 1 and 2 are spliced ​​correspondingly, and then the mechanical clamps are used to rigidly fix and clamp the plates. After splicing, a gap of 1 mm is formed between the two curling edges of the coated plates. 14. The fiber laser is used to transmit the laser light to the welding area with an optical fiber. The defocus of the beam is -0.5mm. The welding robot is used to hold the welding torch and move along the center of the weld for welding. Weld C8 and Weld D9, welding posit...

Embodiment 3

[0054] The high-strength weather-resistant cold-rolled clad plate used is the ZAM plate produced by Nisshin Company, and the chemical composition and specifications of the base material are the same as those in Example 1. The upper beam (that is, profile 4) is made of CortenA plate with a thickness of 2.0mm, and the chemical composition (wt%) is as follows: C 0.12, Mn 0.2-0.5, Si0.25-0.75, P 0.07-0.15; S 0.05; Ni: 0.65; Cr 0.30-1.25; Cu0.25-0.55, the rest is Fe and unavoidable impurities. The mechanical properties of Corten A plate are: yield strength R p0.2 =345MPa, tensile strength R m =480MPa, elongation A=22%,

[0055] Lap welding: before welding according to image 3 In the design of the middle joint, the welding edge of the coated plate 3 is curled, the curling angle is 90 degrees, the width of the curling 13 is 2mm, and the radius of the fillet of the curling 13 is 2mm, and the welding part of the profile 4 is processed and the curling 13 The right-angled assembly g...

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Abstract

The invention relates to a strong weather resistance cold rolling container coating plate laser welding process, solving the problems that the existing strong weather resistance cold rolling container coating plate welding precision is low, welding line moulding is poor, joint performance is poor, process is complex and production efficiency is low. The technical scheme adopts the laser welding technology, and joint structure for halving joint and angle joint is designed, a gap for escaping steam when welding coating is reserved, and the gap is convenient for realizing accurate assembly positioning, and the technological conditions of welding line protection gas and laser welding control are adopted, so as to ensure that the welded construction member has no deformation, appearance of welding line is beautiful, coating burning loss is less, welding joint performance is not lower than base metal, thus completely meeting the precision and quality requirements of container erection welding, and the process is simple and production efficiency is high.

Description

technical field [0001] The invention relates to a welding process for coated plates, in particular to a welding process for high-strength weather-resistant cold-rolled container coated plates using laser welding technology. Background technique [0002] China is the world's largest producer of containers, with an annual capacity of 2 million TEUs, accounting for about 90% of the world's container demand. At present, the types of steel used in the production of containers mainly include hot-rolled plates, profiles and welded pipes, among which the amount of steel plates accounts for more than 96% of the total steel used, and the thickness ranges from 1.6 to 6.0mm, and most of them are atmospheric corrosion-resistant steels, such as: CortenA, 09CuPCrNi, SPA-H, Q345GNHL, B480GNQ, etc. In recent years, with the continuous development of cold-rolled coating process and the continuous development of new corrosion-resistant coating materials, the use of high-strength and weather-r...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/32B23K26/42B23K26/12B23K26/322B23K26/70
Inventor 龚涛缪凯黄治军刘吉斌王玉涛钟如涛倪伟邓小波
Owner 武汉钢铁有限公司
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