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

An iron-cobalt-nickel, high-entropy technology, used in additive processing and other directions, can solve the problems of insufficient plasticity, insufficient strength, and high plasticity of high-entropy alloys, and achieve the effects of reducing solidification temperature, reducing shrinkage, and facilitating production

Active Publication Date: 2021-04-30
CHINA UNIV OF MINING & TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] A preparation method of iron-cobalt-nickel-manganese-copper high-entropy cast iron, comprising the following steps:

[0025] Step 1, weighing raw materials according to the molar ratio of each element in the alloy component of the iron-cobalt-nickel-manganese-copper high-entropy cast iron;

[0026] Step 2, put the raw materials into an induction melting furnace, pass in an inert gas or add a covering agent to prevent oxidation during melting, and obtain the iron-cobalt-nickel-manganese-copper high-entropy cast iron through melting.

[0027] Among them, high-entropy cast iron is obtained by adjusting the distribution state of carbon element in the raw material to control its microstructure. The distribution state of carbon element refers to the form in which carbon element is distributed in the cast iron structure. If the carbon is distributed in a spherical shape, high-entropy nodular cast iron is obtained. , if the carbon element is distributed in sheets, high-entropy ...

Embodiment 1

[0031] The alloy of the iron-cobalt-nickel-manganese-copper high-entropy cast iron of the present embodiment becomes Fe a co b Ni c mn d Cu e C f x g , where a=22.98, b=19.155%, c=19.155%, d=19.155%, e=19.155%, f=0.4% and g=0%, namely Fe 1.2 CoNiMnCuC 0.4 .

[0032] The preparation method of the iron-cobalt-nickel-manganese-copper high-entropy cast iron of this embodiment is as follows: pre-treat the high-purity raw materials to reduce the content of harmful impurities; weigh the raw materials according to the molar ratio of each element; put the raw materials into an induction melting furnace, During smelting, an inert gas is introduced or a covering agent is added to prevent oxidation. After smelting, a 50g ingot is obtained, in which graphite exists in a high-entropy matrix in the form of nodular graphite.

[0033] In this example, high-entropy ductile iron was obtained by adjusting the content of each principal component.

Embodiment 2

[0035] The alloy of the iron-cobalt-nickel-manganese-copper high-entropy cast iron of the present embodiment becomes Fe a co b Ni c mn d Cu e C f x g , where X is Mo, a=19.888%, b=19.888%, c=19.888%, d=19.888%, e=19.888%, f=0.36% and g=0.2%, namely FeCoNiMnCuC 0.36 Mo 0.2 .

[0036] The preparation method of the iron-cobalt-nickel-manganese-copper high-entropy cast iron of this embodiment is as follows: pre-treat the high-purity raw materials to reduce the content of harmful impurities; weigh the raw materials according to the molar ratio of each element; put the raw materials into an induction melting furnace, During smelting, an inert gas is introduced or a covering agent is added to prevent oxidation. After smelting, a 50g ingot is obtained, in which graphite exists in a high-entropy matrix in the form of nodular graphite.

[0037] In this example, high-entropy ductile iron was obtained by adjusting the content of each principal component.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02B33Y70/00
CPCC22C30/02C22C37/04C22C33/08C21C1/10B33Y70/00
Inventor 陈正时家淳樊宇刘雨雨徐杰张平张金勇沈承金孙智
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap