Butt welding method for double-layer metal composite boards

A double-layer metal, welding method technology, applied in welding medium, welding equipment, metal processing and other directions, can solve the problems of poor mutual solubility, deterioration of metal structure and properties, and large differences in physical and chemical properties, so as to improve the joint strength and ensure corrosion resistance. or conductivity and other properties, the effect of avoiding changes in components

Inactive Publication Date: 2016-10-12
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large difference in physical and chemical properties and poor mutual solubility between the cladding and base materials, the metal structure and properties of the transition layer weld metal near the cladding / base interface will deteriorate when the metal composite plate is welded by conventional fusion welding [1-12]. The performance of welded joints is difficult to guarantee, which severely limits the application of bimetal composite panels in industries such as oil and gas, chemical and automobile manufacturing

Method used

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  • Butt welding method for double-layer metal composite boards
  • Butt welding method for double-layer metal composite boards
  • Butt welding method for double-layer metal composite boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Butt welding of TA1 / Q345 bimetal clad plate

[0043] according to figure 1 The double-groove scheme shown is used to process the butt-welded groove of the base of the bimetallic composite board. All the steel on the upper surface of the layer is removed to ensure that Q345 material will not be mixed into the weld of the clad layer TA1. Firstly, argon arc welding is used to prepare the multi-layer TA1 weld, and then the double-groove method is used to prepare the multi-layer metal weld protective coating made of Fe-based alloy as a transition layer on the base layer by using the double-groove method, and finally the gas shielded welding is used Methods The Q345 weld seam of the base layer was prepared by welding, so as to obtain a complete butt welding joint of TA1 / Q345 double-layer metal composite plate with sandwich structure. In the argon arc welding process of the TA1 clad layer, a small heat input is used to ensure that only the clad layer material TA1 ...

Embodiment 2

[0044] Example 2: Butt welding of TA2 / 235R bimetal clad plate

[0045] according to figure 1 The double-groove scheme shown is used to process the butt-welded groove of the base of the bimetallic composite board. The bottom of the double-groove exposes the cladding layer by 3-5mm, and then all the steel on the upper surface of the TA1 cladding layer at the root of the groove is removed to ensure that the cladding layer TA2 No 235R material will be incorporated into the weld. The multi-layer TA2 weld seam is prepared by laser welding firstly, and then the double-groove method is used to prepare a multi-layer metal protective coating made of FeCrAl as a transition layer on the base layer by thermal spraying method, and finally the base layer is prepared by argon arc welding. 235R welding seam, so as to obtain a complete TA2 / 235R double-layer metal composite plate butt welding joint. In the laser welding process of TA2 cladding, low energy input is used to ensure that only the ...

Embodiment 3

[0046] Example 3: TA1 / X65 bimetal composite tube-sheet butt welding

[0047] according to figure 2 The groove scheme shown is to process the butt welding groove of the base of the bimetallic composite board. The base is made with a U-shaped groove, the bottom of the U-shaped groove exposes the composite layer by 7-9mm, and the composite layer is opened with a 60-degree V-shaped groove. First use argon arc welding to prepare the multi-layer TA1 weld, use argon to protect the multi-layer to reduce oxidation, and then use the arc spraying method to prepare a transition layer made of metal FeCr alloy in the U-shaped groove of the base; the filling welding of the base It is completed by two welding methods. Firstly, the argon arc welding method with small linear energy is used to prepare a weld seam with a thickness of about 3mm (to minimize the melting amount of the transition layer), and then the submerged arc welding method is used to complete the filling welding of the remaini...

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Abstract

The invention discloses a butt welding method for double-layer metal composite boards. The method comprises the following steps: (1) forming a multi-layer welding line in a multi-layer groove by adopting fusion welding to be connected with multi-layer metal; (2) preparing a multi-layer metal welding line protective coating at the bottom of a base-layer groove on the multi-layer welding line by adopting a spraying method to be used as transition layer; and (3) forming a base-layer welding line in the base-layer groove by adopting fusion welding to be connected with a base-layer metal layer. According to the invention, the design of the welding line is combined with the welding method, and therefore, direct metallurgical reaction between multi-layer metal and base-layer metal cannot occur during welding; and a layer of multi-layer metal welding line protective coating is formed between the multi-layer metal welding line and the base-layer metal welding line, so that subsequent processes cannot cause change of components of the multi-layer metal welding line, and re-melting of the multi-layer welding line cannot occur. The method can effectively avoid change of components of the multi-layer metal of the multi-layer metal welding line caused by the welding process, improve the performances of corrosion resistance and the like of the multi-layer welding line during welding of double-layer metal welding, and ensure seamless connection between the multi-layer welding line and the base-layer welding line.

Description

technical field [0001] The invention belongs to the field of material processing and relates to a butt welding method for metal composite plates. Background technique [0002] The metal composite panel has the comprehensive advantages of the two materials, saves precious metal materials, realizes the perfect combination of low-cost base layer and high-performance clad layer, and has broad application prospects. However, due to the large difference in physical and chemical properties and poor mutual solubility between the cladding and base materials, the metal structure and properties of the transition layer weld metal near the cladding / base interface will deteriorate when the metal composite plate is welded by conventional fusion welding [1-12]. The performance of welded joints is difficult to guarantee, which severely limits the application of bimetal composite panels in industries such as oil and gas, chemical and automobile manufacturing. [0003] [1] Chu, Q.L., Zhang, M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K31/12B23K33/00B23K35/00B23K101/18B23K103/18
CPCB23K31/02B23K31/12B23K33/00B23K35/001B23K2103/18B23K2101/18
Inventor 李成新谭香付斯林张林杰雒晓涛杨冠军李长久
Owner XI AN JIAOTONG UNIV
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