Butt welding method and welding structure of bimetal clad plate without intermediate layer

A welding method and composite plate technology, 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., and achieve stable joint performance , low cost, guaranteed quality effect

Active Publication Date: 2022-07-19
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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  • Butt welding method and welding structure of bimetal clad plate without intermediate layer
  • Butt welding method and welding structure of bimetal clad plate without intermediate layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The titanium / steel clad plate is welded by adopting the butt welding structure and the 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. Align and close them together, and check with a feeler gauge, the gap between the two plates is less than 0.1mm. Then, the X80 steel material with a thickness of 1.2 mm is removed from the end face to be welded by milling, and the titanium layer is retained; at this time, the titanium layer is a step of 1.2 mm protruding 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, and ...

Embodiment 2

[0035] The titanium / steel clad plate is welded by adopting the butt welding structure and the 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. Align and close them together, and check with a feeler gauge, the gap between the two plates is less than 0.1mm. Then, the Q235 steel material with a thickness of 1 mm is cut off on the end face to be welded by milling, and the titanium layer is retained; at this time, the titanium layer is a step of 1 mm protruding from the base layer. Then use the milling method to open the groove of the base layer, the angle of which is 30° on one side, and the thickness of the blunt edge is 2mm;

[0...

Embodiment 3

[0043]The stainless steel / carbon steel clad plate is welded by adopting the butt welding structure and the 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. Align and close them together, and check with a feeler gauge, the gap between the two plates is less than 0.1mm. Then, the Q235 steel material with a thickness of 1.5mm is cut off on the end face to be welded by milling, and the stainless steel layer is retained; at this time, the titanium layer is a step of 1.5mm protruding 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 edge is 2m...

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Abstract

The invention relates to the field of welding production, in particular to a method for welding without an intermediate transition layer, through welding groove setting and welding method selection and process optimization, so as to avoid the adverse effects of elements in the matrix layer and the composite layer from being contacted and mixed by melts. The butt welding method of the bimetal clad plate to ensure the mechanical properties and corrosion resistance of the welded joints includes the following steps: a. material preparation: forming a base layer blunt edge structure and base layer groove structure; b. cleaning the welding seam and welding surface near the seam; c. Pairing: the two plates are butted, and the bimetal composite plate is fixed by using a fixture; d. Welding: firstly, the welding seam of the composite layer is welded by laser welding, and then the base layer is welded by arc welding For the part of the blunt edge structure, finally, arc welding or laser hybrid welding method is used to complete the remaining bead of the weld to be welded. The invention is especially 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 a 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 chemical, energy, marine engineering and other fields. However, titanium and titanium alloys are expensive. In order to reduce costs, titanium alloys are often used in the form of titanium / steel composite plates, that is, titanium alloys are used as composite layers in contact with the medium to provide corrosion resistance of composite materials, and steel with excellent mechanical properties is used as matrix materials to provide mechanical properties of composite materials. performance. The meaning of stainless steel / carbon steel clad plate is similar to that of titanium / steel clad plate. Sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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