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A kind of diffusion welding connection method of cocrcufeni high entropy alloy

A high-entropy alloy and connection method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of limited alloy engineering application and less research work, and achieve the effect of effective connection, high strength and plasticity

Active Publication Date: 2021-02-02
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, less research work has been carried out on the diffusion welding of this alloy, which limits the engineering application of this alloy

Method used

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  • A kind of diffusion welding connection method of cocrcufeni high entropy alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0023] Diffusion welding connection of two CoCrCuFeNi high-entropy alloy base materials with a size of 1500×100×5 mm.

[0024] The surface of the CoCrCuFeNi high-entropy alloy base material was polished with sandpaper, cleaned with ultrasonic waves for 30 minutes, and then dried. Sand the 35μm thick Ti, Cu, Ni, Co and Sn foils with sandpaper, ultrasonically clean them for 30 minutes, then dry them, and sandwich them in two pieces in the order of Ti / Cu / Ni / Sn / Co / Sn / Ni / Cu / Ti Between the CoCrCuFeNi high-entropy alloy base materials to be welded, place them in diffusion welding equipment, apply a pressure of 15MPa, and place them in a vacuum of 10 -3 Under Pa, raise the temperature to 1000°C, keep the temperature for 50 minutes, and then cool with the furnace to complete the welding.

Embodiment 3

[0026] Diffusion welding connection of two CoCrCuFeNi high-entropy alloy base materials with a size of 1000×200×15 mm.

[0027] The surface of the CoCrCuFeNi high-entropy alloy base material was polished with sandpaper, cleaned with ultrasonic waves for 30 minutes, and then dried. Sand the 40μm thick Ti, Cu, Ni, Co and Sn foils with sandpaper, ultrasonically clean them for 30 minutes, then dry them, and clamp them in two pieces in the order of Ti / Cu / Sn / Co / Ni / Co / Sn / Cu / Ti Between the CoCrCuFeNi high-entropy alloy base materials to be welded, place them in diffusion welding equipment, apply a pressure of 18MPa, and place them in a vacuum of 10 -2 Under Pa, heat up to 1100°C, keep the temperature for 60 minutes, then cool with the furnace to complete the welding.

Embodiment 4

[0029] Diffusion welding connection of two CoCrCuFeNi high-entropy alloy base materials with a size of 800 × 100 × 20 mm.

[0030] The surface of the CoCrCuFeNi high-entropy alloy base material was polished with sandpaper, cleaned with ultrasonic waves for 30 minutes, and then dried. Sand the 45μm thick Ti, Cu, Ni, Co and Sn foils with sandpaper, ultrasonically clean them for 30 minutes, then dry them, and sandwich them in two pieces in the order of Ti / Ni / Sn / Co / Cu / Co / Sn / Ni / Ti Between the CoCrCuFeNi high-entropy alloy base materials to be welded, place them in the diffusion welding equipment, apply a pressure of 20MPa, and place them in a vacuum of 10 -1 Under Pa, raise the temperature to 1200°C, keep the temperature for 50 minutes, and then cool with the furnace to complete the welding. According to the mechanical performance test, the tensile strength of the welded joint is 401MPa, and the elongation is 28.5%.

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Abstract

The invention discloses a diffusion welding connection method of a CoCrCuFeNi high-entropy alloy. Ti, Cu, Ni, Co and Sn foils with uniform thickness are placed between the base materials of the CoCrCuFeNi high-entropy alloy to be welded, and pressure is applied. Diffusion welding is accomplished by high temperature heating. The CoCrCuFeNi high-entropy alloy of the invention has higher strength and plasticity after diffusion welding. It can ensure that the CoCrCuFeNi high-entropy alloy can be effectively connected during engineering applications.

Description

technical field [0001] The invention relates to a diffusion welding connection method, in particular to a diffusion welding connection method of a CoCrCuFeNi high-entropy alloy. Background technique [0002] High entropy alloy is a new alloy system. Its characteristic is that the overall structure of the alloy is composed of all solid solution phases. In terms of composition, the entire alloy is composed of a variety of elements with equal atomic ratios, which replaces the design concept of traditional materials based on a certain alloying element. Since this alloy is a centered cubic or face-centered cubic structure of full solid solution, there is no brittle intermetallic compound, thus forming excellent mechanical properties. Its properties, such as strength, hardness, wear resistance and corrosion resistance, thermal resistance, electrical resistance, magnetic properties, etc. are relatively excellent. As the earliest high-entropy alloy system studied, CoCrCuFeNi has e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/24
CPCB23K20/026B23K20/24
Inventor 秦庆东李娟张英哲伍玉娇龙琼伍剑明苏向东
Owner GUIZHOU INST OF TECH