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Method for welding titanium and steel by applying high-entropy effect and welding material

A welding material and effect technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as poor joint performance and difficult control of welding process, and achieve convenient and easy welding process and easy processing and forming , wide adaptability

Inactive Publication Date: 2014-06-04
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for welding titanium and steel using high-entropy effect, which solves the problems in the prior art that the welding process is difficult to control, or the joint performance is poor due to brittle intermetallic compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the total percentage of 100%, wherein Al 20%, Ni 40%, and Cu 40% are used to select the element content of each component, and according to the above-mentioned embodiment, a conventional crystal of Al20Ni40Cu40 with a thickness of 150 μm, a width of 5 mm, and a length of 0.5 m is prepared. State interlayer alloy foil. Using the alloy foil folded into several layers as the middle layer, TA2 and 0Cr18Ni9Ti were resistance spot welded, and the tensile shear strength of the welded joint was about 283 MPa; the alloy foil was folded into several layers as the middle layer, and TA2 and Q235 were welded Resistance spot welding, the tensile shear strength of the welded joint is about 294MPa.

Embodiment 2

[0028] According to the step of above-mentioned embodiment 1, be 100% according to total percentage, wherein Al 25%, Ni35%, the data of Cu 40% selects each component element and content, roll surface line speed is controlled at 5m / s, prepares Al25Ni35Cu40 conventional crystalline interlayer alloy foil with a thickness of 130 μm, a width of 5 mm, and a length of 0.8 m. The alloy foil of the middle layer is used to fold and perform resistance spot welding on TA2 and 0Cr18Ni9Ti, and the tensile shear strength of the welded joint is about 291 MPa; the alloy foil is folded into several layers as the middle layer, and TA2 and Q235 are resistance spot welded. The tensile shear strength of the welded joint is about 296MPa.

Embodiment 3

[0030] According to the step of above-mentioned embodiment, according to total percentage is 100%, wherein Al 30%, Ni 35%, the data of Cu 35% selects each component element and content, roll surface line speed is controlled at 5m / s, prepares Al30Ni35Cu35 conventional crystalline interlayer alloy foil with a thickness of 110 μm, a width of 5 mm, and a length of 0.8 m. The alloy foil of the middle layer is folded, and TA2 and 0Cr18Ni9Ti are subjected to resistance spot welding, and the tensile shear strength of the welded joint is about 288 MPa; the alloy foil is folded into several layers as the middle layer, and TA2 and Q235 are subjected to resistance spot welding, The tensile shear strength of the welded joint is about 284MPa.

[0031] In summary, the method of the present invention and its intermediate layer alloy have good melting and processing performance, good matching with titanium and alloy steel during welding, the weld (nugget) is a single-phase fcc solid solution s...

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Abstract

The invention discloses a method for welding titanium and steel by applying the high-entropy effect. A folded middle-layer alloy foil is arranged between a titanium plate to be welded and a steel plate to be welded, and the welding operation is carried out by adopting a resistance spot-welding mode, then the interface resistance heat melts the middle-layer alloy and local base materials, and the molten metals are mixed, so that the high-performance welding of titanium and steel is realized. The invention also discloses a middle-layer alloy and a preparation method of the middle-layer alloy. The middle-layer alloy comprises the following components in the terms of atomic percent: 20-30% of Al, 35-40% of Ni and 35-40% of Cu, wherein the total percent is 100%. The invention has the advantages that the middle-layer alloy is well matched with the titanium and the alloy steel in welding, welding seams (nugget) are single-phase fcc solid-solution structures, and the comprehensive mechanical performance of joints is obviously improved. The preparation method of the middle-layer alloy foil is simple in process and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a method for welding titanium and steel using a high-entropy effect. The invention also relates to a welding material used in the method for welding titanium and steel using a high-entropy effect and a preparation method thereof. Background technique [0002] Titanium and its alloys have high specific strength and good corrosion resistance, and are important aerospace structural materials. However, due to the high price of titanium metal, its further development and application are limited. Steel is cheap and has good thermoelectric and mechanical properties. In some cases, dissimilar material joints that combine the excellent properties of titanium alloy and stainless steel are required, such as some parts in nuclear fuel reprocessing equipment in nuclear power plants, satellite fuel injectors and components in attitude propulsion control systems etc. Recently, they are trying ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/10B23K11/20B23K35/30B23K35/40
Inventor 翟秋亚魏亚库田健徐锦锋
Owner XIAN UNIV OF TECH
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