Laser cladding high-entropy alloy coating and preparation method thereof

• Main Authors: LI WEISHANG, LIU LIANG, ZHANG XIAOWEI, TAO JIANTAO, QI HUIQING, LIU HONGXI
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: ALLOYS; CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention provides a laser cladding high-entropy alloy coating and a preparation method thereof, and belongs to the technical field of alloy surface coating modification. The high-entropy alloy coating is composed of five metal elements of Al, Ti, V, Cr and Nb according to a certain atomic ratio, and metal powder is subjected to ball milling and powder mixing; diluting the mixed metal powder with absolute ethyl alcohol until the metal powder is thick, and uniformly adhering the metal powder to the surface of the titanium alloy to form an alloy powder prefabricated layer; and cladding the alloy powder prefabricated layer on the surface of the titanium alloy matrix through laser cladding to form the high-entropy alloy coating. The hardness, strength and wear resistance of the alloy and the bonding degree of the base material are remarkably improved. 本发明提供了一种激光熔覆高熵合金涂层及其制备方法，属于合金表面涂层改性技术领域。本发明的高熵合金涂层，由一定原子比的五种金属元素Al、Ti、V、Cr、Nb组成，将金属粉末球磨混粉；将混合好的金属粉末用无水乙醇稀释至粘稠后均匀粘附在钛合金表面形成合金粉末预制层；通过激光熔覆将合金粉末预制层熔覆在钛合金基体表面形成高熵合金