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High-strength rotor shaft forgings and heat treatment methods for high-voltage motors

A heat treatment method and high-voltage motor technology, applied in the field of high-strength rotor shaft forgings and heat treatment for high-voltage motors

Active Publication Date: 2020-10-02
BAODING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still technical bottlenecks in the manufacture of large-scale high-voltage motors in China, such as the stability of the overall motor during high-speed operation, and the compatibility of internal key components, etc., all need further research and analysis

Method used

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  • High-strength rotor shaft forgings and heat treatment methods for high-voltage motors
  • High-strength rotor shaft forgings and heat treatment methods for high-voltage motors
  • High-strength rotor shaft forgings and heat treatment methods for high-voltage motors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A high-strength rotor shaft forging for a high-voltage motor, mass percentage: C 0.30-0.36%, Si0.17-0.37%, Mn0.25-0.50%, P and S≤0.020%, Cr1.30-1.60 %, Mo0.20-0.35%, Ni1.30-1.60%, V0.04-0.10%.

Embodiment 2

[0017] Embodiment 2: On the basis of embodiment 1, C 0.34%, Si0.32%, Mn0.33%, P0.004%, S0.006%, Cr1.51%, Mo0.31%, Ni1.40%, V0.081%.

[0018] Reach technical indicators: yield strength Re = 695MPa; tensile strength Rm = 850MPa; elongation A = 21.0%; reduction of area Z = 61.3%; impact toughness value AKv = 105J, 113J, 108J (20 ℃).

Embodiment 3

[0019] Embodiment 3: On the basis of embodiment 1, C 0.33%, Si0.34%, Mn0.35%, P0.006%, S0.007%, Cr1.50%, Mo0.33%, Ni1.50%, V0.075%.

[0020] Reach technical indicators: yield strength Re = 685MPa; tensile strength Rm = 845MPa; elongation A = 19.0%; reduction of area Z = 61.0%; impact toughness AKv = 110J, 120J, 115J (20 ℃).

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Abstract

The invention relates to a high strength rotor shaft forging for a high-voltage motor and a heat treatment method. Running stability requirements of a high-voltage motor rotor shaft in a premise thata high-voltage motor rotor shaft rotor diameter reaches 1040 mm can be met. The high strength rotor shaft forging comprises, by mass, 0.30-0.36% of C, 0.17-0.37% of Si, 0.25-0.50% of Mn, no more than0.020% of P and S, 1.30-1.60% of Cr, 0.20-0.35% of Mo, 1.30-1.60% of Ni, and 0.04-0.10% of V. The high strength rotor shaft forging for the high-voltage motor has the advantages that firstly, the factthat reappearance of the high-voltage motor rotor shaft forging is realized by using domestic materials is developed, all the technical indexes of the motor rotor shaft forging meet design requirements, and after mechanical properties of the motor rotor shaft are tested by a third party, the mechanical properties of the motor rotor shaft fully meet the design requirements; and secondly, ultrasonic inspection of the rotor shaft forging is tested by an ABS classification society and is identified bythe ABS classification society.

Description

technical field [0001] The invention relates to a high-strength rotor shaft forging for a high-voltage motor and a heat treatment method that can meet the requirements for the smooth operation of the rotor shaft of a high-voltage motor under the premise that the diameter of the rotor shaft of the high-voltage motor reaches 1040 mm, and belongs to the field of high-voltage motor shaft forging manufacturing. Background technique [0002] With the continuous construction of the global marine economy and the continuous improvement of the shipbuilding industry, traditional low-voltage motors are no longer capable of meeting the needs of marine power, and are gradually being replaced by high-voltage and ultra-high-voltage motors. The high-end manufacturing of high-voltage motors has gradually reflected its importance. At present, there are still technical bottlenecks in the manufacture of large-scale high-voltage motors in China, such as the stability of the overall motor during h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46C22C38/44C22C38/02C22C38/04C21D6/00C21D8/00C21D1/26C21D1/18
CPCC21D1/18C21D1/26C21D6/004C21D8/005C22C38/02C22C38/04C22C38/44C22C38/46
Inventor 朱奇锋张林洲杨丽芳曹雄伟
Owner BAODING TECH CO LTD