CN-122012962-A - Method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting vacuum arc melting furnace

Abstract

The invention provides a method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting a vacuum arc melting furnace, which comprises the following steps: raw material preparation, charging, vacuumizing and inflation protection, arc melting, solidification and ingot turning remelting homogenization. The method has the advantages of simple flow and good repeatability, and is suitable for microalloying preparation of the regenerated 5052 aluminum alloy.

Inventors

• ZHANG YI
• JI CHENGUANG
• LI PENGHUI
• HE XIANGWEN
• TANG YIHAO
• TIAN BAOHONG
• JING KE
• ZHOU MENG
• HE LEI
• CHU CHUNHE
• YU GUANGSONG

Assignees

• 河南科技大学
• 中色科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260209

Claims (7)

1. 1. A method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting a vacuum arc melting furnace is characterized by comprising the following steps: s1, preparing raw materials: selecting regenerated 5052 aluminum alloy and Al-20Y intermediate alloy as raw materials; Calculating and weighing the mass of the regenerated 5052 aluminum alloy and the Al-20Y intermediate alloy according to the mass fraction of the target Y; s2, charging: filling the regenerated 5052 aluminum alloy and the Al-20Y intermediate alloy in the S1 into a groove of a water-cooled copper base of a vacuum arc melting furnace to obtain a filling material; S3, vacuumizing and inflating protection: vacuumizing a furnace chamber of a vacuum arc melting furnace, filling high-purity argon, and then melting under the protection atmosphere of the high-purity argon; S4, arc melting: Arc melting is carried out on the charge obtained in the step S2, single arc melting is carried out for 120S-240S under the condition that the arc current is 60A-80A, and a melt is obtained after the charge is melted; S5, solidifying: after stopping arc melting, solidifying the melt obtained in the step S4 on a water-cooled copper base of the vacuum arc melting furnace to form an ingot; S6, ingot turning remelting homogenization: And (3) carrying out ingot turning remelting on the ingot obtained after the melt in the step (S5) is solidified, namely repeatedly carrying out arc melting in the step (S4), and solidifying and ingot turning operation of the step (S5), so as to obtain the Y microalloying regenerated 5052 aluminum alloy.
2. 2. The method for preparing the Y microalloyed recycled 5052 aluminum alloy with a vacuum arc furnace according to claim 1, wherein the mass fraction of Y in the Al-20Y master alloy in S1 is 20%.
3. 3. A method of preparing a Y microalloyed recycled 5052 aluminum alloy in a vacuum arc furnace according to claim 1, wherein the purity of said high purity argon in S3 is 99.9%.
4. 4. The method for preparing the Y microalloying regenerated 5052 aluminum alloy by adopting the vacuum arc melting furnace, as claimed in claim 1, wherein the specific method for vacuumizing the furnace chamber of the vacuum arc melting furnace and filling high-purity argon gas in the S3 is that vacuumizing is carried out until the vacuum degree is 5 multiplied by 10 -3 Pa～6×10 -3 Pa, and filling high-purity argon gas until the vacuum degree is 0.05Pa.
5. 5. The method for preparing the Y microalloying regenerated 5052 aluminum alloy by using a vacuum arc melting furnace according to claim 1, wherein the number of times of ingot turning remelting in S6 is 6-7.
6. 6. The method for preparing the Y microalloyed recycled 5052 aluminum alloy by using the vacuum arc melting furnace according to claim 1, wherein the mass fraction of Y in the Y microalloyed recycled 5052 aluminum alloy in S6 is 0.2% -0.4%.
7. 7. The method for preparing the Y microalloyed recycled 5052 aluminum alloy by using the vacuum arc melting furnace according to claim 1, wherein the room-temperature tensile strength of the Y microalloyed recycled 5052 aluminum alloy in S6 is 123-142 MPa, the yield strength is 46-55 MPa, and the elongation is 8.5-22.6%.

Description

Method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting vacuum arc melting furnace Technical Field The invention belongs to the technical field of regenerated aluminum alloy metallurgy and microalloying, and particularly relates to a method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting a vacuum arc melting furnace. Background The 5052 aluminum alloy belongs to an Al-Mg alloy, has good formability, corrosion resistance and welding performance, and is widely applied to the fields of transportation, ships, structural members and the like. Along with the development of recycling of regenerated aluminum, the regenerated 5052 aluminum alloy has advantages in the aspects of cost and low carbon, but the problems of fluctuation of impurity elements, unstable inclusion and gas content and the like in the regenerated raw material easily cause coarse as-cast structure, unfavorable second phase and increased performance discreteness. The Y element has potential functions of purification, modification, refinement and the like, and the shape of an alloy structure and a second phase can be improved to a certain extent through microalloying, so that a structure foundation is provided for improving the comprehensive mechanical property and the corrosion resistance. The vacuum arc melting furnace has the characteristics of controllable atmosphere, high melting purity, convenience for laboratory rapid preparation and the like, and is suitable for microalloying preparation and process verification of the regenerated aluminum alloy. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a method for preparing Y microalloying regenerated 5052 aluminum alloy by adopting a vacuum arc melting furnace and application thereof, and the method has simple flow and good repeatability and is suitable for microalloying preparation of the regenerated 5052 aluminum alloy. In order to solve the technical problems, the invention adopts the technical scheme that the method for preparing the Y microalloying regenerated 5052 aluminum alloy by adopting a vacuum arc melting furnace comprises the following steps: s1, preparing raw materials: selecting regenerated 5052 aluminum alloy and Al-20Y intermediate alloy as raw materials; Calculating and weighing the mass of the regenerated 5052 aluminum alloy and the Al-20Y intermediate alloy according to the mass fraction of the target Y; s2, charging: filling the regenerated 5052 aluminum alloy and the Al-20Y intermediate alloy in the S1 into a groove of a water-cooled copper base of a vacuum arc melting furnace to obtain a filling material; S3, vacuumizing and inflating protection: vacuumizing a furnace chamber of a vacuum arc melting furnace, filling high-purity argon, and then melting under the protection atmosphere of the high-purity argon; S4, arc melting: Arc melting is carried out on the charge obtained in the step S2, single arc melting is carried out for 120S-240S under the condition that the arc current is 60A-80A, and a melt is obtained after the charge is melted; S5, solidifying: after stopping arc melting, solidifying the melt obtained in the step S4 on a water-cooled copper base of the vacuum arc melting furnace to form an ingot; S6, ingot turning remelting homogenization: And (3) ingot turning remelting is carried out on the ingot obtained after the melt is solidified in the step (S5), namely arc melting in the step (S4), solidification and ingot turning operation in the step (S5) are carried out repeatedly, so that the melt is finally solidified on a water-cooled copper base to form button ingots/small ingots, and the Y microalloying regenerated 5052 aluminum alloy is obtained. Compared with the regenerated 5052 aluminum alloy without adding Y, the Y microalloying regenerated 5052 aluminum alloy prepared by the invention has potential advantages in the aspects of structure and performance, on one hand, the Y element has purifying and deteriorating effects on impurity phases in melt, can reduce adverse effects of coarse needle-shaped/skeleton-shaped intermetallic compounds of regenerated materials caused by impurities such as Fe, si and the like, and enables the second phase to be finer and more uniformly distributed, and on the other hand, the Y element and the possibly formed fine dispersed phase can promote nucleation and inhibit grain growth, thereby realizing as-cast grain refinement, segregation alleviation and structure uniformity improvement. Preferably, the mass fraction of Y in the Al-20Y master alloy in S1 is 20%. Preferably, the purity of the high purity argon gas in S3 is 99.9%. Preferably, the specific method for vacuumizing the furnace chamber of the vacuum arc melting furnace and filling high-purity argon in the step S3 is to vacuumize to a vacuum degree of 5 multiplied by 10 -3Pa～6×10-3 Pa and fill high-purity argon to a vacuum degree of 0.05Pa. Preferably, in the step S4, the arc current is