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Welding medium entropy alloy material and welding method

A welding method, entropy alloy technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of low strength and toughness, achieve low cost, simple preparation, and prevent the formation of brittle mesophase Effect

Active Publication Date: 2019-06-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to provide a medium-entropy alloy material and welding method for welding to solve the problem of welding of metal materials, especially the strength of the weld in the welding of dissimilar metal materials. and low toughness, and has the advantages of simple configuration, easy industrial production, low cost, and environmental friendliness

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  • Welding medium entropy alloy material and welding method

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Embodiment 1

[0045] This embodiment uses a medium-entropy alloy material with a particle size of 10-200μm in the form of a powder, with a composition formula of Cr50%, Co30%, and Ni20%, for welding between stainless steel and titanium. The structural diagram of the welding system is as follows figure 1 As shown, the steps are as follows:

[0046] (1) The base material of the metal material to be welded in this embodiment is treated with a V-shaped groove between the base material material A1 and the base material material B2, and the apex angle is 60°;

[0047] (2) Clean the groove to a clean state without oil, rust, impurities, and dust, and polish the groove to smooth;

[0048] (3) Under the protection of argon gas, an industrial robot is equipped with a laser 3 and a powder feeding system 4 is connected in parallel, and the entropy alloy material 6 in the powder form after drying in this embodiment is filled into the powder feeding system 4;

[0049] (4) According to the scanning speed of 800mm / ...

Embodiment 2

[0052] In this embodiment, a medium-entropy alloy material in the form of powder with a particle size of 10 to 200 μm is used, and the composition formula is Cr33%, Co33%, and Ni34% for welding between stainless steel and aluminum. The schematic diagram of the welding method is as follows figure 1 As shown, the steps are as follows:

[0053] (1) The base material of the metal material to be welded in this embodiment is treated with a V-shaped groove between the base material material A1 and the base material material B2, and the apex angle is 60°;

[0054] (2) Clean the groove to a clean state without oil, rust, impurities, and dust, and polish the groove to smooth;

[0055] (3) Under the protection of argon gas, an industrial robot is equipped with a laser 3 and a powder feeding system 4 is connected in parallel, and the entropy alloy material 6 in the powder form after drying in this embodiment is filled into the powder feeding system 4;

[0056] (4) According to the scanning speed o...

Embodiment 3

[0060] In this embodiment, a medium-entropy alloy material in the form of a welding wire with a diameter of 1.5 mm is used, and the composition formula is Cr30%, Co20%, and Ni50%. The welding between stainless steel and titanium is carried out. The schematic diagram of the welding method is as follows image 3 As shown, the steps are as follows:

[0061] (1) The base material of the metal material to be welded in this embodiment is treated with a V-shaped groove between the base material material A1 and the base material material B2, and the apex angle is 60°;

[0062] (2) Clean the groove to a clean state without oil, rust, impurities, and dust, and polish the groove to smooth;

[0063] (3) Under the protection of argon gas, an industrial robot is equipped with a laser 3 and a wire feeding system 5 is connected in parallel, and the entropy alloy material 7 in the form of welding wire in this embodiment is filled into the wire feeding system 5;

[0064] (4) According to the scanning sp...

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Abstract

The invention discloses a welding medium entropy alloy material and a welding method, and relates to the technical field of welding materials. The medium entropy alloy material comprises CrCoNi and iscomposed of, by atomic percent, 20%-50% of Cr, 20%-50% of Co and 20%-50% of Ni, and the total percentage is 100%. The invention further discloses the welding method using the medium entropy alloy material for welding of metal materials, in particular to welding of dissimilar metal materials. The 'diffusion retardation' effect of the medium entropy alloy is utilized for delaying or even preventingdiffusion of dissimilar materials in the welding process, formation of various brittle intermediate phases is prevented, the mechanical properties of welds is greatly improved, involved elements arefew, preparation is simple, industrial production can be achieved easily, and meanwhile, the advantages of low cost and environmental friendliness are achieved.

Description

Technical field [0001] The invention relates to the technical field of welding materials, in particular to a medium entropy alloy material for welding and a welding method. Background technique [0002] The welding of metal materials is widely used in aerospace, transportation, petrochemical, nuclear power and other fields, and it is an indispensable key link in many equipment manufacturing processes. However, welded joints, especially welded joints of certain dissimilar materials, due to the inter-diffusion of elemental components in the material during the melting and heating process, it is easy to produce brittle intermetallic phases in the welded joint area, resulting in welded joints and the whole The structural mechanical properties have dropped sharply, which greatly limits the engineering application of fusion welding. At present, using a metal material different from the welding object as an isolation layer to prevent direct contact of the welding material is one of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/02
Inventor 冯凯李铸国王志远韩帛伦
Owner SHANGHAI JIAO TONG UNIV
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