A kind of high-entropy alloy powder and method for preparing cladding layer by using laser

Abstract

The invention discloses high-entropy alloy powder (CrFeNiTiMo). The powder is composed of Cr powder, Fe powder, Ni powder, Ti powder and Mo powder, and meanwhile, a method utilizing laser for preparing a cladding layer through the high-entropy alloy powder is provided. The method comprises the steps of ball grinding of the high-entropy alloy powder, pretreatment of a base body, preparing g of a pre-arranging layer, and finally preparing of the cladding layer through a laser device, wherein in the whole ball grinding process and in the whole laser processing process, Ar protection is achieved. The hardness of the cladding layer prepared through the high-entropy alloy powder is obviously improved, and reaches the diamond pyramid hardness 800 HV, Mo in the alloy elements is a quite effective solution strengthening element, grains can be refined, existence of the Mo effectively improves the number of solute atoms of solid solutions, the solute atoms and dislocation have the interaction, the dislocation motion resistance is improved, and the strength of alloy is improved; and the Ti with the large atomic radius easily generates lattice distortion, a large number of solid solutions are produced, and the solution strengthening effect is obvious.

Description

technical field [0001] The invention relates to the field of high-entropy alloys and their cladding layer preparation methods, specifically, high-entropy alloy powders composed of five element powders of Cr, Fe, Ni, Ti and Mo and their laser cladding layer preparation methods. Background technique [0002] Traditional alloys use one or two (such as Fe, Al, Mg, Ni, Co, Cu, etc.) metals as the main components, and the structure and properties of the alloy mainly depend on the main components. With the continuous advancement of science and technology, the requirements for materials are getting higher and higher, and the existing alloys can no longer meet the actual needs. [0003] High-entropy alloys are a new type of alloy material developed under this background. High-entropy alloys, also known as high-disorder alloys, are new alloys proposed by scholars in Taiwan in the 1990s who first broke the traditional alloy design model. Design concept, because its entropy value is hi...

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Problems solved by technology

With the continuous advancement of science and technology, the requirements for materials are getting higher and higher, and the existing alloys can no longer meet the actual needs.

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