CN-121992271-A - High-strength Ni-Co-Cr-Mo high-entropy alloy and preparation method thereof

CN121992271ACN 121992271 ACN121992271 ACN 121992271ACN-121992271-A

Abstract

The invention relates to the technical field of high-entropy alloy, in particular to a high-strength Ni-Co-Cr-Mo high-entropy alloy and a preparation method thereof, wherein the alloy comprises the following chemical components: the atomic ratios of the chemical components of nickel, cobalt, chromium and molybdenum are respectively as follows: 35-40% of nickel, 25-40% of cobalt, 15-30% of chromium and 5-10% of molybdenum; the atomic ratios of nickel, cobalt, chromium and molybdenum in the high-entropy alloy are 37.6%, 28.2% and 6%, respectively; the atomic ratios of nickel, cobalt, chromium and molybdenum in the high-entropy alloy are 35.51%, 35.37%, 22.91% and 6.21%, respectively; the high-entropy alloy of the invention has excellent strength; the preparation process is simple to operate and low in cost, and the prepared high-entropy alloy has the advantages of small impurity amount and uniform components; the rolling assembly is adopted, so that rod-shaped materials with different section diameters can be rolled, the rolling range is increased, and the rolling effect of the rod-shaped materials is improved; the feeding assembly is adopted, so that the rod-shaped material can be automatically clamped, then automatically pushed, the automatic rolling of the rod-shaped material is improved, and the using effect of the equipment is improved.

Inventors

TONG YANG
XIE TONG
WANG CAIXIA
SUN YUXIN
ZHOU DAWEI
MENG FANCHAO
CHEN SHUYING
JIANG LIANG

Assignees

烟台大学

Dates

Publication Date: 20260508
Application Date: 20231226

Claims (10)

1. The high-strength Ni-Co-Cr-Mo high-entropy alloy is characterized by comprising the following chemical components of nickel, cobalt, chromium and molybdenum, wherein the atomic ratio of the chemical components is 35-40% of nickel, 25-40% of cobalt, 15-30% of chromium and 5-10% of molybdenum.
2. The high-strength Ni-Co-Cr-Mo-based high-entropy alloy according to claim 1, wherein the high-entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 37.6%, 28.2% and 6%, respectively.
3. The high-strength Ni-Co-Cr-Mo-based high-entropy alloy according to claim 1, wherein the high-entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 35.51%, 35.37%, 22.91% and 6.21%, respectively.
4. The high-strength Ni-Co-Cr-Mo-based high-entropy alloy according to claim 1, wherein the high-entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 37.6%, 32.9%, 23.5% and 6%, respectively.
5. The method for preparing the high-strength Ni-Co-Cr-Mo series high-entropy alloy according to claim 1, which is characterized by comprising the following steps of arc melting, material casting, homogenizing and rolling; In the first step, a vacuum arc melting method is adopted to prepare a bulk Ni-Co-Cr-Mo series high-entropy alloy, wherein the raw materials are 99.99 percent of metal simple substances of high-purity nickel, cobalt, chromium and molybdenum, the vacuum air pressure is 10 < -4 > Pa, and the melting current is 200A; In the second step, pouring the smelted material into a mould, and then performing air cooling to suction cast the material into a rod shape; in the third step, the material tube sealing after suction casting is carried out heating on the material in a vacuum environment, the heating temperature is 1250 ℃, the heating time is 24 hours, and the high-temperature homogenization treatment is carried out to eliminate the component segregation; in the fourth step, the homogenized material is rolled by a rolling mill, the rolling mill rotating speed is 300r/min, and the lower rolling proportion is 80%.
6. The apparatus for the preparation method of high-strength Ni-Co-Cr-Mo-based high-entropy alloy according to claim 5, wherein in the fourth step, the rolling mill comprises a rolling mill body (1), a processing tank (2), a rolling assembly (3), a feeding assembly (4) and a position sensor (5), the processing tank (2) is provided on one side of the rolling mill body (1), the rolling assembly (3) is mounted on one side inner wall of the processing tank (2), the feeding assembly (4) is mounted on one side inner wall of the processing tank (2), and the position sensor (5) is symmetrically mounted on one side inner wall of the processing tank (2).
7. The device for preparing the high-strength Ni-Co-Cr-Mo alloy according to claim 6, wherein the rolling assembly (3) comprises a first motor (301), a first gear (302), a first screw rod (303), a second gear (304), a lifting frame (305), a first connecting plate (306), a first threaded hole (307), a second motor (308) and a rolling roller (309), wherein the lifting frame (305) is symmetrically arranged on one side inner wall of the treatment tank (2), the rolling roller (309) is rotationally connected on one side inner wall of the lifting frame (305), a second motor (308) is embedded and arranged on the other side inner wall of the lifting frame (305), one end of an output shaft of the second motor (308) is fixedly connected on the outer wall of the rolling roller (309), the two side outer walls of the lifting frame (305) are welded with first connecting plates (306), the two side inner walls of the treatment tank (2) are respectively welded with the first screw rods (303), one side of the first connecting plates (306) is correspondingly provided with the first gear (307), the two outer walls of the first screw rods (304) are fixedly connected with the first screw rods (304), the two side inner walls of the treatment tank (2) are embedded and provided with a first motor (301), and one end of an output shaft of the first motor (301) is fixedly connected to the outer wall of the first gear (302).
8. The apparatus for preparing the high-strength Ni-Co-Cr-Mo high-entropy alloy according to claim 7, wherein the feeding assembly (4) comprises a chute (401), a third motor (402), a second screw rod (403), a slide plate (404), a second threaded hole (405), a push plate (406), a second connecting plate (407), a telescopic rod (408), a spring (409) and a clamping plate (4010), the second connecting plate (407) is welded on one side outer wall of the lifting frame (305), the telescopic rod (408) is embedded and mounted on one side inner wall of the second connecting plate (407), the clamping plate (4010) is fixedly connected with the outer wall of one end of the telescopic rod (408), the spring (409) is fixedly connected with the outer wall of the second connecting plate (407), the push plate (406) is mounted on one side of the clamping plate (4010), the bottom outer wall of the push plate (406) is welded with the second connecting plate (404), the slide plate (401) is correspondingly provided with the first screw rod (404) on the inner wall of the bottom end of the processing tank (2), a second threaded hole (405) is formed in one side of the sliding plate (404) corresponding to the position of the second screw rod (403), a third motor (402) is mounted on the inner wall of the other side of the sliding groove (401), and one end of an output shaft of the third motor (402) is fixedly connected to the outer wall of the second screw rod (403).
9. The apparatus for producing a high-strength Ni-Co-Cr-Mo alloy having high entropy alloy according to claim 7, wherein said first gear (302) and said second gear (304) are of a type of conical gear, and one side of said first gear (302) and one side of said second gear (304) are perpendicular to each other.
10. The apparatus for manufacturing a high-strength Ni-Co-Cr-Mo-based high-entropy alloy according to claim 8, wherein the spring (409) is inserted into the outer wall of the telescopic rod (408), and one side of the position sensor (5) is mounted on the outer wall of the clamping plate (4010).

Description

High-strength Ni-Co-Cr-Mo high-entropy alloy and preparation method thereof Technical Field The invention relates to the technical field of high-entropy alloy, in particular to a high-strength Ni-Co-Cr-Mo high-entropy alloy and a preparation method thereof. Background The high-entropy alloy is also called as multi-principal element alloy, and is a novel alloy system which usually contains 3 to 5 elements and has equal or near-equal atomic ratio of each element compared with the traditional alloy, the frame of the alloy design ensures that the alloy shows excellent properties, such as excellent mechanical properties, good corrosion resistance, irradiation resistance and the like, which are different from the traditional alloy, but the high-entropy alloy designed in the early stage has insufficient strength and limited application. Disclosure of Invention The invention solves the problem of providing a high-strength Ni-Co-Cr-Mo high-entropy alloy and a preparation method thereof, wherein the high-entropy alloy has excellent strength, the preparation process is simple to operate, the cost is low, and the prepared high-entropy alloy has the advantages of less impurity amount and uniform components. In order to achieve the aim, the invention adopts the following technical scheme that the high-strength Ni-Co-Cr-Mo high-entropy alloy and the preparation method thereof comprise the following chemical components of nickel, cobalt, chromium and molybdenum, wherein the atomic ratio of each chemical component is 35-40% of nickel, 25-40% of cobalt, 15-30% of chromium and 5-10% of molybdenum. Preferably, the high entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 37.6%, 28.2% and 6%, respectively. Preferably, the high entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 35.51%, 35.37%, 22.91% and 6.21%, respectively. Preferably, the high entropy alloy has nickel, cobalt, chromium and molybdenum atomic ratios of 37.6%, 32.9%, 23.5% and 6%, respectively. Preferably, the preparation method of the high-strength Ni-Co-Cr-Mo high-entropy alloy comprises the following steps of arc melting, material casting, homogenizing treatment, rolling, and the like; In the first step, a vacuum arc melting method is adopted to prepare a bulk Ni-Co-Cr-Mo series high-entropy alloy, wherein the raw materials are 99.99 percent of metal simple substances of high-purity nickel, cobalt, chromium and molybdenum, the vacuum air pressure is 10 < -4 > Pa, and the melting current is 200A; In the second step, pouring the smelted material into a mould, and then performing air cooling to suction cast the material into a rod shape; in the third step, the material tube sealing after suction casting is carried out heating on the material in a vacuum environment, the heating temperature is 1250 ℃, the heating time is 24 hours, and the high-temperature homogenization treatment is carried out to eliminate the component segregation; in the fourth step, the homogenized material is rolled by a rolling mill, the rolling mill rotating speed is 300r/min, and the lower rolling proportion is 80%. Preferably, in the fourth step, the rolling mill comprises a rolling mill main body, a processing groove, a rolling assembly, a feeding assembly and a position sensor, wherein the processing groove is formed in one side of the rolling mill main body, the rolling assembly is installed on one side inner wall of the processing groove, the feeding assembly is installed on one side inner wall of the processing groove, and the position sensor is symmetrically installed on one side inner wall of the processing groove. Preferably, the rolling subassembly includes first motor, first gear, first lead screw, second gear, lifting frame, first connecting plate, first screw hole, second motor and rolling roller, the lifting frame is installed to symmetry on the one side inner wall of processing groove, it is connected with the rolling roller to rotate on the one side inner wall of lifting frame, inlay on the opposite side inner wall of lifting frame and install the second motor, and the output shaft one end rigid coupling of second motor is on the outer wall of rolling roller, all weld first connecting plate on lifting frame's the both sides outer wall, the welding has first lead screw to distribute on the both sides inner wall of processing groove, first screw hole has been seted up to one side of first connecting plate corresponding first lead screw position, fixedly connected with second gear on the one end outer wall of first lead screw, two the meshing is installed first gear on the one side outer wall of second gear, all inlay on the both sides inner wall of processing groove and install first motor, and the output shaft one end rigid coupling of first motor is on the outer wall of first gear. Preferably, the feeding assembly comprises a sliding groove, a third motor, a second screw rod, a sliding plate, a second threaded hole, a pushing pl