Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Meidum- and high-carbon steel plate laser welding method and device

A laser welding, medium and high carbon technology, used in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of poor plasticity and toughness of welds, easy fracture of welds, etc., and achieve the effect of improving welding performance

Inactive Publication Date: 2016-08-31
武汉钢铁有限公司
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current prior art, when laser welding medium-high carbon steel, rapid heating and cooling during the welding process tends to produce martensitic structure, resulting in poor plasticity and toughness of the weld, which makes the weld easy to break

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Meidum- and high-carbon steel plate laser welding method and device
  • Meidum- and high-carbon steel plate laser welding method and device
  • Meidum- and high-carbon steel plate laser welding method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A hot-rolled plate with the chemical composition shown in Table 1 is used, and the sample size is: 2.0×500×1000mm, and the welding method is adopted with homogeneous materials.

[0032] Chemical composition (wt%) of table 1 experimental steel

[0033]

[0034] The welding scheme is shown in Table 2. The maximum welding power of the welding machine used here is 12kw CO 2 Laser welding device, the laser power used in this test is 12kw, the welding speed is 6m / min, the welding gap distance is 0.05mm, and the laser focal length is -2.5mm.

[0035] Table 2 welding scheme

[0036]

[0037] Corresponding evaluation experiments were carried out on the welded samples, and the experimental results are shown in Table 3.

[0038] Table 3 Weld quality evaluation

[0039]

[0040] Observe the weld microstructure after welding, such as figure 1 , figure 2 The tempered sorbite is shown, and the microhardness of the welded structure is tested as image 3 shown.

Embodiment 2

[0042] The hot-rolled plate with the chemical composition shown in Table 4 is used, the sample size is: 2.0×500×1200mm, and the method of welding with homogeneous materials is adopted.

[0043] Chemical composition (wt%) of table 4 experimental steel

[0044]

[0045] The welding scheme is shown in Table 5. The maximum welding power of the welding machine used here is 12kw CO 2 Laser welding device, the laser power used in this test is 8kw, the welding speed is 5m / min, the welding gap distance is 0.06mm, and the laser focal length is -1mm.

[0046] Table 5 welding scheme

[0047]

[0048] Corresponding evaluation experiments were carried out on the welded samples, and the experimental results are shown in Table 6.

[0049] Table 6 Weld quality evaluation

[0050]

[0051] Observe the weld microstructure after welding, such as Figure 4 , Figure 5 The tempered sorbite is shown, and the microhardness of the welded structure is tested as Figure 6 shown.

Embodiment 3

[0053] Use a hot-rolled plate with the chemical composition shown in Table 7. The sample size is: 2.0×500×1200mm, and the method of welding with homogeneous materials is adopted.

[0054] Chemical composition (wt%) of table 7 experimental steel

[0055]

[0056] The welding scheme is shown in Table 8. The maximum welding power of the welding machine used here is 12kw CO 2 Laser welding device, the laser power used in this test is 6kw, the welding speed is 4m / min, the welding gap distance is 0.08mm, and the laser focal length is -0.5mm.

[0057] Table 7 welding scheme

[0058]

[0059] Corresponding evaluation experiments were carried out on the welded samples, and the experimental results are shown in Table 6.

[0060] Table 8 Weld Quality Evaluation

[0061]

[0062] Observe the weld microstructure after welding, such as Figure 7 , Figure 8 The tempered sorbite is shown, and the microhardness of the welded structure is tested as Figure 9 shown.

[0063]From...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a medium- and high-carbon steel plate laser welding method and device. The laser welding method comprises the following steps of 1) trimming, positioning and fixing a medium- and high-carbon steel plate to be welded; 2) carrying out thermal pretreatment on the steel plate in the first step; 3) after regulating the laser focal length, the laser power and the laser speed, carrying out laser welding on the steel plate after thermal pretreatment in the second step; and 4) after laser welding is finished, carrying out thermal treatment on the steel plate. According to the laser welding method, by selecting proper preheating temperature and preheating time, setting reasonable laser welding parameters and carrying out post-weld treatment on a welding seam by using a proper thermal treatment process, the welding performance is improved, and thus various performance of the medium- and high-carbon steel plate after welding are equivalent to those of a matrix material.

Description

technical field [0001] The invention relates to a laser welding method, in particular to a laser welding method and device for medium and high carbon steel plates. Background technique [0002] Medium and high carbon steel is one of the important fields of advanced steel material research, and it is an important basic material urgently needed for the development of national economy backbone industries such as aerospace, transportation and machinery manufacturing. Many products of medium and high carbon plates and strips can only be delivered to end customers after cold rolling or precision rolling. However, due to the poor welding performance of medium and high carbon steels, they are rarely produced on cold rolling mills. The thermal conductivity of medium and high carbon steel is poor, and there is a significant temperature difference between the welding zone and the unheated part during the welding process. When the molten pool is extremely cooled, the internal stress cau...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K26/24B23K26/32B23K26/60
CPCB23K26/24B23K26/32B23K26/60B23K2103/04
Inventor 甘晓龙韩斌汪水泽谭文孙宜强蔡珍
Owner 武汉钢铁有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com