Preparation method of low-density and low-cost Fe-Mn-Al-C medium-entropy alloy
A fe-mn-al-c, entropy alloy technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of high cost, reduced alloy density, unfavorable large-scale promotion and application of alloys, etc., to achieve low energy Consumption and cost reduction effect
Active Publication Date: 2020-09-18
UNIV OF SCI & TECH BEIJING
View PDF6 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the current medium-entropy alloy system contains high-cost elements such as Co and Ni, and the cost of the alloy is high, which is not conducive to the large-scale promotion and application of the alloy.
On the other hand, for engineering structural materials, the pursuit of light weight and high strength is an eternal goal, and the addition of high Co and Ni content is not conducive to the reduction of alloy density
However, low-density Fe-Mn-Al-C medium-entropy alloys that do not contain Co and Ni elements have not been reported yet.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] Table 1 shows the alloy compositions of the examples and some reference alloy compositions (atomic percentages). Apparently, the embodiments described below are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] Alloy preparation: prepared according to the composition shown in alloys 1-9 in Table 1. (1) Use mechanical grinding or pickling to remove metallurgical raw materials Fe, Mn, Al, and C with a purity of more than 99.9% to remove the oxide skin on the surface of the raw metal; (2) convert it into a mass ratio and accurately weigh the ratio, and the Mn raw material is additionally added 5% mass to compensate for smelting loss, clean raw materials with absolute ethanol ultrasonic vibration; (3) use vacuum non-consumable electric arc furnace t...
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
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| yield strength | aaaaa | aaaaa |
| elongation | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a preparation method of low-density and low-cost Fe-Mn-Al-C medium-entropy alloy, and belongs to the field of metal materials and preparation. The alloy comprises the followingchemical components in percentage by atom: 33.0 to 38.0 percent of Fe, 33.0 to 38.0 percent of Mn, 21.0 to 25.0 percent of Al and 4.0 to 7.0 percent of C; a preparation process of the alloy comprisesthe following steps of descaling metallurgical raw materials Fe, Mn, Al and C, and cleaning by adopting an ultrasonic wave or acid pickling method; smelting alloy through a non-consumable vacuum arcfurnace or an induction furnace, and acquiring medium-entropy alloy plate-shaped or rod-shaped material through a vacuum suction casting or casting method. The material has high strength and high plasticity while the medium-entropy alloy has low density, and the alloy is low in element cost, and can be applied to the fields of transportation, machinery, energy and the like.
Description
technical field [0001] The invention relates to a method for preparing a low-density, low-cost and high-performance medium-entropy alloy, which belongs to the field of metal materials and their preparation. Background technique [0002] According to the mixing entropy of the alloy melt, alloys can be classified as high-entropy alloys (ΔS mix >1.6R, R is the gas constant, the same below), medium entropy alloy (1.1R<ΔS mix <1.6R), low entropy alloy (ΔS mix <1.1R). Traditional metal materials such as steel, aluminum alloy, and titanium alloy are basically low-entropy alloys. High-entropy alloys have a variety of principal elements, and have been extensively studied because of their excellent performance. Now a variety of high-entropy alloy series have been developed. For example, FeCoCrNiMn high-entropy alloys have good mechanical properties at low temperatures, AlCoCrCuFeNi high-entropy alloys can obtain high strength and corrosion resistance, and NbMoTaW high-...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/00C21D9/00
CPCC21D9/0075C21D9/0081C22C1/02C22C30/00C22F1/002
Inventor 惠希东百瑞刘旭莉吉铮
Owner UNIV OF SCI & TECH BEIJING