High-entropy flux-cored wire for titanium-steel mig welding and method for preparing same

Abstract

The invention discloses a high-entropy flux-cored wire used for titanium-steel MIG welding. The high-entropy flux-cored wire used for titanium-steel MIG welding is prepared by following components including, by atomic percent, 5 to 15% of Fe, 10 to 20% of Ti, 18 to 25% of Co, 20 to 35% of Cr, 21 to 35% of Ni and 5 to 13% of Cu, wherein the total percent of the components is 100%. An industrial high pure copper strip is adopted in a skin material. The preparing method comprises the steps of firstly, smelting and matching of a mother alloy; secondly, applying of a vacuum gas atomization powder making technology to prepare atomized powder; thirdly, adopting of a flux-cored wire forming unit device for making the high-entropy flux-cored wire. The high-entropy flux-cored wire is used for carrying out titanium-steel MIG welding, an excellent titanium-steel welding joint is obtained, chemical components of welding line metal are in the main element range of a high-entropy alloy, and high-entropy of the welding line is achieved. The welding line has the excellent strength and toughness, the brittle intermetallic compound is effectively removed, and the comprehensive mechanical performanceis good.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a high-entropy flux-cored welding wire for titanium-steel MIG welding and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious energy and environmental problems, there are urgent requirements for product lightweight in the manufacturing industries of aircraft, automobiles, trains, ships, etc., as well as in the fields of energy, aerospace, and national defense. Titanium and titanium alloys play an important role in the process of product lightweight due to their excellent properties of low density and high specific strength. The weight of titanium-steel composite parts is equivalent to 50~60% of steel, and at the same time it has other excellent properties of titanium and steel. It can improve material utilization, reduce structural weight, improve corrosion resistance of parts, and reduce costs. On the one hand, it has obvi...

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Problems solved by technology

[0004] The present invention organically combines flux-cored welding wire technology and high-entropy alloy technology to obtain a high-entropy flux-cored welding wire. The purpose is to solve the problem of brittle intermetallic compounds that are easily formed when MIG welding wire directly welds titanium-steel in the prior art. The problem of reducing the strength of welded joints

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