Iron-cobalt-nickel-manganese-copper high-entropy cast iron and preparation method and application thereof

Abstract

The invention discloses iron-cobalt-nickel-manganese-copper high-entropy cast iron and a preparation method and application thereof. The alloy component of the iron-cobalt-nickel-manganese-copper high-entropy cast iron is FeaCobNicMndCueCfXg, wherein X is a microelement, a, b, c, d, e, f and g are the mole percentages of the corresponding elements, a is larger than 5%, b is larger than 5%, c is larger than 5%, d is larger than 5%, e is larger than 5%, the sum of a, b, c, d and e is larger than 90%, f is larger than 0.2% and smaller than 0.4%, and g is larger than or equal to 0%. According to the iron-cobalt-nickel-manganese-copper high-entropy cast iron and the preparation method and application thereof, a single principal element of original cast iron is replaced with multiple principal elements, a matrix structure can be composed of FCC and a compound or FCC and a graphite phase, and the excellent mechanical performance is obtained. In the alloy design process, the positive influences of the microelement on alloy oxidation resistance, corrosion resistance and high-temperature stability are fully utilized, and the alloy comprehensive performance is excellent.

Description

technical field [0001] The invention belongs to the field of casting material molding and advanced manufacturing applications, and specifically relates to a high-entropy cast iron with eutectic high-entropy alloy as the design concept, which is mainly used for sand casting, special casting, 3D printing and the like. Background technique [0002] Cast iron is an iron-carbon alloy with a carbon content of more than 2%. Industrial cast iron generally contains 2.5% to 3.5% carbon, and its main element is iron. According to the classification of carbon in cast iron, cast iron can be divided into hypoeutectic cast iron , Eutectic cast iron and hypereutectic cast iron. In order to obtain different properties, cast iron contains more trace elements such as Si, Mn, Al, Cr, Co, etc. Cast iron is easy to smelt, low in cost, has good casting performance, high wear resistance, good shock absorption and cutting performance, and has been widely used. [0003] High-entropy alloys are a ne...

AI Technical Summary

Problems solved by technology

However, the high-entropy alloy with single-phase FCC structure has strong plasticity but insufficient strength, and the high-entropy alloy with single-phase BCC structure has high strength but insufficient plasticity. If the alloy structure is composed of FCC and BCC or FCC and hard intermetallic compound dual-phase structure, then A balance of strength and plasticity can be obtained