A kind of rotor guide bar and preparation method thereof

A rotor guide bar and formula technology, applied in the field of materials, can solve the problems of cumbersome preparation methods and low production efficiency, and achieve the effect of simple process and uniform grain size

Active Publication Date: 2022-05-13

无锡天宝电机有限公司

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AI-Extracted Technical Summary

Problems solved by technology

The preparation method is cumbersome...

Method used

The preparation method provided in this comparative example is processed by cold isostatic pressing and hot isostatic pressing sintering, so that the rotor material and the rotating shaft are better compounded, and the occurrence of cracks at the joint wit...

Abstract

The invention provides a rotor guide bar and a preparation method thereof. The rotor guide bar includes Zr, Ni, Co, Mg, Si, Al, Ag, Cu and unavoidable impurities. The preparation method comprises the following steps: The formula amount is ball milled and mixed with zirconium powder, magnesium powder, silicon powder, aluminum powder, silver powder, copper plate and binder. During ball milling, absolute ethanol is used to immerse the grinding material to obtain the first grinding material; the first grinding material is heat treated, and the second grinding material is obtained after cooling. Second grinding material: mix nickel powder, cobalt powder and the second grinding material according to the formula amount, use absolute ethanol to immerse the grinding material during ball milling, and obtain the third grinding material; carry out hot isostatic pressing sintering after cold isostatic pressing, heat preservation treatment After natural cooling, the rotor conductor is obtained. The preparation method is simple and practicable, and the prepared rotor bar still has excellent tensile strength, elongation and electrical conductivity at 400° C., which meets the use requirements of the asynchronous motor.

Application Domain

Manufacturing dynamo-electric machines

Technology Topic

Electro conductivitySilica fume +10

Image

Examples

Experimental program(5)
Comparison scheme(5)
Effect test(1)

Example Embodiment

[0048] Example 1

[0049] The present embodiment provides a method for preparing a rotor conductor, the preparation method comprising the following steps:

[0050] In terms of mass percentage, the rotor guide comprises: Zr 0.09wt%, Ni 0.2wt%, Co 0.2wt%, Mg0.35wt%, Si 1.5wt%, Al 0.3wt% and Ag 0.06wt, the margin is copper and unavoidable impurities; among the unavoidable impurities, Fe ≤ 0.05wt% and Pb ≤ 0.05wt%.

[0051] (1) According to the formula of the ball mill mixed zirconium powder, magnesium powder, silicon powder, aluminum powder, silver powder, copper plate and binder, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 30 μm of the first abrasive; the binder is epoxy resin, the amount of binder added is 11wt% of the first abrasive;

[0052] (2) The first abrasive obtained by the heat treatment step (1) under 700 °C conditions, so that the binder in the first abrasive is removed, and the second abrasive is obtained after cooling;

[0053] (3) According to the formula of the ball mill mixed nickel powder, cobalt powder and step (2) obtained the second abrasive, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 30 μm of the third abrasive;

[0054] (4) Under the condition of 135MPa, cold isostatic pressure is molded for 2min, and then hot isostatic pressure is sintered for 0.6h under the conditions of 220MPa and 950 °C, cooled to 450 °C insulation for 2.5h, and then naturally cooled to room temperature to obtain the rotor conductor.

Example Embodiment

[0055] Example 2

[0056] The present embodiment provides a method for preparing a rotor conductor, the preparation method comprising the following steps:

[0057] In terms of mass percentage, the rotor guide comprising: Zr 0.09wt%, Ni 0.15wt%, Co 0.25wt%, Mg 0.32wt%, Si 1.2wt%, Al 0.35wt% and Ag 0.07wt%, the margin is copper and unavoidable impurities; among the unavoidable impurities, Fe ≤ 0.05wt% and Pb ≤0.05wt%.

[0058] (1) According to the formula of the ball mill mixed zirconium powder, magnesium powder, silicon powder, aluminum powder, silver powder, copper plate and binder, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 35 μm of the first abrasive; the binder is phenolic resin, the amount of binder added is 11.5wt% of the first abrasive;

[0059] (2) The first abrasive obtained by the heat treatment step (1) under 750 °C conditions makes the binder in the first abrasive be removed, and the second abrasive is obtained after cooling;

[0060] (3) According to the formula of the ball mill mixed nickel powder, cobalt powder and step (2) obtained the second abrasive, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 35 μm of the third abrasive;

[0061] (4) Under the condition of 140MPa, cold isostatic pressure is molded for 1.5 minutes, and then hot isostatic pressing is sintered for 0.6h under the conditions of 240MPa and 980 °C, cooled to 480 °C for 2.8h, and then naturally cooled to room temperature to obtain the rotor conductor.

Example Embodiment

[0062] Example 3

[0063] The present embodiment provides a method for preparing a rotor conductor, the preparation method comprising the following steps:

[0064] In terms of mass percentage, the rotor guide comprising: Zr 0.08wt%, Ni 0.1wt%, Co 0.3wt%, Mg0.3wt%, Si 1wt%, Al 0.4wt% and Ag 0.06wt, the margin is copper and unavoidable impurities; among the unavoidable impurities, Fe ≤ 0.05wt% and Pb ≤0.05wt%.

[0065] (1) According to the formula of the ball mill mixed zirconium powder, magnesium powder, silicon powder, aluminum powder, silver powder, copper plate and binder, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 40 μm of the first abrasive; the binder is phenolic resin, the amount of binder added is 12wt% of the first abrasive;

[0066] (2) The first abrasive is obtained from the heat treatment step (1) under 800 °C, so that the binder in the first abrasive is removed, and the second abrasive is obtained after cooling;

[0067] (3) According to the formula of the ball mill mixed nickel powder, cobalt powder and step (2) to obtain the second abrasive, ball mill using anhydrous ethanol immersion abrasive, to obtain the average particle size of 40 μm of the third abrasive;

[0068] (4) Under the condition of 150MPa, cold isostatic pressure is molded for 1min, and then hot isostatic pressure sintering is carried out under the conditions of 250MPa and 1000 °C for 0.5h, cooled to 500 °C for 2h, and then naturally cooled to room temperature to obtain the rotor conductor.

PUM

Property	Measurement	Unit
Particle size	30.0	µm
Particle size	35.0	µm
Particle size	40.0	µm

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Simple process
uniform grain size

A kind of rotor guide bar and preparation method thereof

A rotor guide bar and formula technology, applied in the field of materials, can solve the problems of cumbersome preparation methods and low production efficiency, and achieve the effect of simple process and uniform grain size

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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