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Interlayer-free butt welding method and welding structure for bimetal composite plate

A welding method and technology for composite plates, applied in welding equipment, metal processing equipment, laser welding equipment, etc., can solve the problems of deterioration of corrosion resistance of stainless steel layer, influence of mechanical properties of brittle compounds, poor welding quality, etc.

Active Publication Date: 2021-07-06
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dilution of carbon steel components to stainless steel alloy components (such as chromium) and the chromium deficiency caused by the reaction of chromium elements in stainless steel and carbon in carbon steel lead to deterioration of corrosion resistance of stainless steel layers; in addition, the existence of brittle compounds also has a significant impact on mechanical properties
Therefore, existing welding method also has the problem of poor welding quality

Method used

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  • Interlayer-free butt welding method and welding structure for bimetal composite plate
  • Interlayer-free butt welding method and welding structure for bimetal composite plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The titanium / steel clad plate is welded by adopting the butt welding structure and welding method of the bimetal clad plate proposed by the present invention. Wherein, the material of the composite layer (1) is TC4 titanium alloy, and the material of the base layer (2) is X80 pipeline steel. The thickness of the composite layer is 1mm; the thickness of the base layer is 18mm.

[0028] The welding procedure includes the following steps:

[0029] a. First use the milling method to mill the welded end face of the plate flat. Match them together and stick them tightly, and check with a feeler gauge. The gap between the two boards is less than 0.1mm. Then use the milling method to cut off the X80 steel material with a thickness of 1.2mm on the end surface to be welded, and keep the titanium layer; at this time, the titanium layer protrudes 1.2mm from the base layer. Then use the milling method to open the groove of the base material, the groove angle is 30° on one side an...

Embodiment 2

[0035] The titanium / steel clad plate is welded by adopting the butt welding structure and welding method of the bimetal clad plate proposed by the present invention. The composite layer material is TA1 pure titanium, and the base layer material is Q235 steel. The thickness of the composite layer is 0.8mm; the thickness of the base layer is 6mm.

[0036] The welding procedure includes the following steps:

[0037] a. First use the milling method to mill the welded end face of the plate flat. Match them together and stick them tightly, and check with a feeler gauge. The gap between the two boards is less than 0.1mm. Then use the milling method to cut off the Q235 steel material with a thickness of 1mm on the end surface to be welded, and keep the titanium layer; at this time, the titanium layer protrudes 1mm from the base layer. Then use the milling method to open the groove of the base layer, the angle is 30° on one side, and the thickness of the blunt side is 2mm;

[0038]...

Embodiment 3

[0043]The stainless steel / carbon steel clad plate is welded by adopting the butt welding structure and welding method of the bimetal clad plate proposed by the present invention. The composite layer material is SUS316L stainless steel, and the base layer material is Q235 steel. The thickness of the composite layer is 1mm; the thickness of the base layer is 8mm. The welding procedure includes the following steps:

[0044] a. First use the milling method to mill the welded end face of the plate flat. Match them together and stick them tightly, and check with a feeler gauge. The gap between the two boards is less than 0.1mm. Then use the milling method to cut off 1.5mm thick Q235 steel material on the end surface to be welded, and keep the stainless steel layer; at this time, the titanium layer protrudes 1.5mm from the base layer. Then use the milling method to open the groove of the base layer, the angle is 30° on one side, and the thickness of the blunt side is 2mm;

[0045...

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Abstract

The invention relates to the field of welding production, in particular to a butt welding method for a bimetal composite plate, which does not use a middle transition layer for welding, avoids adverse effects caused by contact and mixing of elements in a matrix layer and a composite layer through a melt by arranging a weld groove, selecting a welding method and optimizing a process, and therefore the mechanical property and the corrosion resistance of a welding joint are ensured. The butt welding method comprises the following steps of a, preparing materials, specifically, forming a base body layer truncated edge structure and a base body layer groove structure; B, cleaning weld joints and surfaces near the weld joints; C, assembling, specifically, enabling two plates to be in butt joint, and fixing the bimetal composite plates through a tool clamp; and d, welding, firstly, welding a composite layer welding seam by adopting a laser welding method, then, welding the part of the truncated edge structure of the base body layer by adopting electric arc welding, and finally, finishing the remaining welding bead of the welding seam needing to be welded by adopting an electric arc welding or laser composite welding method. The butt welding method is particularly suitable for the butt welding process of the bimetal composite plate.

Description

technical field [0001] The invention relates to the field of welding production, in particular to a butt welding method and welding structure of a bimetal composite plate without an intermediate layer. Background technique [0002] Titanium or titanium alloys have excellent corrosion resistance in seawater and common acidic media, so they are often used in important occasions in the fields of chemical industry, energy, and marine engineering. However, titanium and titanium alloys are expensive. In order to reduce costs, titanium alloys are often applied in the form of titanium / steel composite plates, that is, titanium alloys are used as a composite layer in contact with the medium to provide the corrosion resistance of the composite material, and steel with excellent mechanical properties is used as the matrix material to provide the mechanical properties of the composite material. performance. The meaning of stainless steel / carbon steel clad plate is similar to that of ti...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/60
CPCB23K26/348B23K26/60
Inventor 刘正林王泽龙唐新新
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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