Preparation method of low-segregation-degree motor rotor microalloy aluminum of new energy automobile and microalloy aluminum prepared through preparation method

A new energy vehicle and motor rotor technology, applied in the field of micro-alloy aluminum, can solve the problems of different mechanical and physical properties, affecting the working effect and service life of castings, etc., and achieve the effect of improving working conditions, shortening cooling time and stabilizing performance

Active Publication Date: 2022-02-15
SHANDONG BOYUAN PRECISION MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the chemical composition of each part of the casting is inconsistent, it is bound to make its mechanical and physical properties different, which will affect the working effect and service life of the casting.

Method used

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  • Preparation method of low-segregation-degree motor rotor microalloy aluminum of new energy automobile and microalloy aluminum prepared through preparation method
  • Preparation method of low-segregation-degree motor rotor microalloy aluminum of new energy automobile and microalloy aluminum prepared through preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Method for preparing a new energy vehicle low-sene-segregation motor rotor microalloy aluminum, including the following steps:

[0030] (1) 0.02 wt% titanium, 0.01 wt% boron, <0.1 wt% silicon, <0.2 wt% iron, 0.01 wt% copper, 0.3 wt% magnesium, <0.1 wt% zinc and ≥99.2 wt% aluminum mixture The heat rear furnace is melted, starting from a surface of the mixture after melting 1 wt% cover, and then warmed to 670 ° C;

[0031] (2) After the furnace temperature is stable, 10% by% NAF is added to refine, stand calm the slag to obtain refined melt A;

[0032] (3) Rapidify the refined melt A to 800 ° C, first add 0.03% by weight of lanthanum, heat insulation for 15 min, then add 0.02% by weight, stirring 0.5 wt% cover, and heat the temperature after 10min;

[0033] (4) When the temperature drops to 670 ° C, 5 wt% NAF is added to refine, and the slag is placed to obtain refined melt B;

[0034] (5) The inner spray coating coating, the coating thickness is 0.5 mm, and the refined melt ...

Embodiment 2

[0037] Method for preparing a new energy vehicle low-sene-segregation motor rotor microalloy aluminum, including the following steps:

[0038](1) 0.02 wt% titanium, 0.01 wt% boron, <0.1 wt% silicon, <0.2 wt% iron, 0.03 wt% copper, 0.35 wt% magnesium, <0.1 wt% zinc and ≥99.2 wt% aluminum mixture The heat rear furnace is melted, and the surface of the mixture is placed on the surface of the mixture after melting, then the temperature is raised to 700 ° C;

[0039] (2) After the furnace temperature is stable, 14Wt% KCL is added to refine, stand calm the slag to obtain refined melt A;

[0040] (3) Rapidify the refined melt A to 820 ° C, first add 0.03% by weight of lanthanum, heat insulation for 20 min, then add 0.03% by weight, stirring 0.7 wt% cover, heat insulation for 20min, starting;

[0041] (4) When the temperature drops to 700 ° C, 8% by weight KCl is added to refine, and stand the slag to obtain refined melt B;

[0042] (5) Side spray coating in the mold, the thickness of the...

Embodiment 3

[0045] Method for preparing a new energy vehicle low-sene-segregation motor rotor microalloy aluminum, including the following steps:

[0046] (1) 0.03 wt% titanium, 0.02 wt% boron, <0.1 wt% silicon, <0.2 wt% iron, 0.05 wt% copper, 0.4 wt% magnesium, <0.1 wt% zinc and ≥99.2 wt% aluminum mixture The heat rear furnace is melted, and the surface of the mixture is 1.5 wt% cover after melting, then warmed to 740 ° C;

[0047] (2) After the furnace temperature is stable, add 18% by weight KCL to refine, stand the slag to obtain refined melt A;

[0048] (3) Rapidify the refined melt A to 850 ° C, first add 0.04 wt%, heat insulation for 22min, then add 0.03 wt% 镱, stirred and palate 1 wt% cover, and heat the temperature after 35min;

[0049] (4) When the temperature drops to 740 ° C, 10% by weight KCL is added to refine, and stand on the slag to obtain refined melt B;

[0050] (5) Side spray coating in the mold, the thickness of the coating is 0.8 mm, the refined melt B is cast into the m...

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Abstract

The invention discloses a preparation method of low-segregation-degree motor rotor microalloy aluminum of a new energy automobile, which comprises the following steps: (1) preheating a mixture of titanium, boron, silicon, iron, copper, magnesium, zinc and aluminum, charging into a furnace for smelting, paving a layer of covering agent on the surface, and heating to 670-800 DEG C; (2) adding a refining agent for refining, performing standing and slag removal to obtain refined melt A; (3) heating the refined melt A to 800-900 DEG C, firstly adding lanthanum, preserving heat for 15-30 minutes, then adding ytterbium, stirring, paving a covering agent, preserving heat for 10-60 minutes, and then cooling; (4) when the temperature is reduced to 670-800 DEG C, adding a refining agent for refining, standing, covering and slagging off to obtain refined melt B; and (5) spraying coating on the inner side of a casting mold, pouring the refined melt B into the casting mold, performing centrifugal casting for 20-40 s, and taking the microalloy aluminum out. According to the method, by adding lanthanum and ytterbium, pinholes are eliminated, and the mechanical property of the microalloy aluminum is improved; and through the regulation and control of each preparation step, the cooling time is shortened, migration and aggregation of TiAl3 and TiB2 are reduced, and segregation is reduced.

Description

Technical field [0001] The present application relates to a preparation method of a new energy vehicle low-septic motor rotor microalloy aluminum and a microalloy aluminum thereof, belonging to microalloy aluminum technology. Background technique [0002] At present, the cast aluminum rotor for new energy vehicles mainly uses pure aluminum. It uses high pressure die casting processes, and there is a large overhelation between the aluminum liquid and the mold, a better refined grain can be achieved, and the material strength can be improved. However, due to the defects of the high pressure die casting process to form a certain amount of air pores, shrinkage holes, which cause the actual rotor parts to be greatly affected. The centrifugal casting process can reduce the air hole, improve the conductivity, but compared to the high pressure casting process, the rotor parts made by the centrifugal casting process are defective. [0003] In addition, during the casting process, the alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06C22C21/06C22C21/08B22D13/04
CPCC22C1/026C22C21/06C22C21/08C22C1/06B22D13/04
Inventor 赵培振温春国郑世育郑广会
Owner SHANDONG BOYUAN PRECISION MASCH CO LTD
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