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High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application

A high-entropy alloy and stainless steel technology, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of low strength, cracking of brittle intermetallic compounds, etc., and achieve excellent strength, wide composition range, and adaptability Good results

Inactive Publication Date: 2015-04-01
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-entropy alloy welding wire for TIG welding titanium / stainless steel, which solves the problem that in the prior art, when titanium and stainless steel are directly welded, a large amount of brittle intermetallic compounds are easily formed in the weld and cause cracking , a problem with lower intensity

Method used

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  • High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application
  • High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the total atomic percentage of 100%, the content of each component is selected according to 5% of Ti, 5% of Fe, 30% of Cr, 30% of Cu, and 30% of Ni, and a diameter of 1.2 is prepared according to the above-mentioned embodiment. mm of Ti5Fe5Cr30Cu30Ni30 high-entropy alloy wire. TIG welding is used to weld 5mm thick TC4 titanium and 1Cr18Ni9 stainless steel. The welding method is as described above. Speed ​​60mm / min, Ar gas lag 4s.

[0033] The test found that the weld metal has good fusion and no cracks in the fusion zone. According to the observation of the metallographic structure, the weld structure from the center to the fusion line of the base metal on both sides presents a gradient layered distribution, and the vicinity of the fusion line is dense equiaxed crystal and columnar. Then grow to the center of the weld in the form of dendrites, the phase structure is composed of a single fcc and bcc, and the tensile strength of the welded joint is 220Mpa. ...

Embodiment 2

[0035] According to the total atomic percentage being 100%, the content of each component is selected according to the data of Ti being 5%, Fe being 10%, Cr being 25%, Cu being 30% and Ni being 30%, and the diameter 1.4mm Ti5Fe10Cr25Cu30Ni30 high-entropy alloy wire. TIG welding is used to weld 5mm thick TB5 titanium and 0Cr13 stainless steel. The welding method is as above. Speed ​​60mm / min, Ar gas lag 3s.

[0036] The test found that the weld metal has good fusion, the joint is full, there are no defects such as surface pores and inclusions, and there is no crack in the fusion zone. According to the observation of the metallographic structure, the weld structure is basically dense equiaxed crystals and dendrites, and the quality of the welded joint is obtained. The tensile strength is 190Mpa.

Embodiment 3

[0038] According to the total atomic percentage of 100%, according to the data of 5% Ti, 8% Fe, 28% Cr, 29% Cu, and 30% Ni, the content of each component element is selected, and prepared according to the above-mentioned embodiment Ti5Fe8Cr28Cu29Ni30 high-entropy alloy welding wire with a diameter of 1.2 mm. TIG welding is used to weld 5mm thick TA2 titanium and 0Cr13 stainless steel. The welding method is as above. Speed ​​50mm / min, Ar gas lag 4s.

[0039] The test found that the fusion of the weld metal is good, and there are no defects such as cracks, pores and inclusions in the fusion zone. According to the observation of the metallographic structure, the weld structure is basically dense equiaxed crystals and dendrites, and the phase structure is a single fcc solid solution. The tensile strength of the joint is 185Mpa.

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Abstract

The invention discloses a high-entropy alloy welding wire for welding titanium / stainless steel in a TIG (Tungsten Inert Gas) mode. The high-entropy alloy welding wire is formed by the following components in atomic percent with the total percent of 100 percent: 5 percent of Ti, 5 percent to 10 percent of Fe, 25 percent to 30 percent of Cr, 25 percent to 35 percent of Cu, and 25 percent to 35 percent of Ni. The invention also discloses a method for using the high-entropy alloy welding wire to weld the titanium / the stainless steel in the TIG mode. The welding material cost is low, the preparation is simple, the welding method is convenient and easy to implement, the adaptability is wide, and an obtained titanium and stainless steel welded joint is good in formation of weld, free of cracks, high in intensity and good in toughness.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a high-entropy alloy welding wire used for TIG welding titanium / stainless steel, and also relates to a TIG welding method for applying the high-entropy alloy welding wire to titanium / stainless steel. Background technique [0002] Important chemical containers, bridge pillars of cross-sea bridges and anti-corrosion liners of super-large floating marine structures are almost all made of titanium-coated stainless steel composite structures. The key to preparing titanium / stainless steel composite structural parts is to solve the problem of titanium and stainless steel. welding problems. [0003] At present, the main method used to weld titanium / stainless steel is argon arc welding. Due to the large difference in physical and chemical properties such as linear expansion coefficient and thermal conductivity of titanium and steel, cracks are easily formed in the welding zone, an...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K9/167B23K9/235B23K35/38
CPCB23K9/167B23K9/235B23K35/302B23K35/3033B23K35/383
Inventor 翟秋亚徐锦锋侯光远
Owner XIAN UNIV OF TECH
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