Preparation method for niobium-containing cast iron-based motor shell

A motor casing and cast iron technology, which is applied in the field of preparation of niobium-containing cast iron-based motor casings, can solve problems such as motor failure to continue normal operation, burnout of motor components, and continuous heat accumulation, so as to achieve uniform chemical composition and improve Casting plasticity, effect of improving casting fluidity

Inactive Publication Date: 2020-04-03
ANHUI XUANLIDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the motor works for a long time, it will generate a lot of heat. If the heat dissipation of the motor shell is poor, the heat will continue to accumulate, and the temperature inside the motor will continue to rise. If the temperature is too high, it will directly burn out the components in the motor, causing The motor cannot continue to work normally

Method used

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  • Preparation method for niobium-containing cast iron-based motor shell

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preparation example Construction

[0026] A method for preparing a niobium-containing cast iron-based motor casing, comprising the following steps:

[0027] (1) Add pig iron to the smelting furnace for smelting to obtain molten iron, and keep it warm for 4-6 minutes;

[0028] (2) Add ferrosilicon, carbon steel scrap, ferromanganese, and copper to the smelting furnace in step (1) in sequence, adjust the temperature of molten iron to 1550-1580°C, keep it warm for 6-8min, and then lower the temperature to 1490-1500°C , and then add ferromolybdenum and ferroniobium in turn, keep warm for 4-6min to obtain composite molten iron, by adding a certain amount of ferrosilicon and ferro-silicone compounding effect, on the one hand, it reduces cementite, pearlite, and ternary phosphorus eutectic , ferrite increases, thus reducing the strength and hardness, and improving the plasticity of castings; on the other hand, silicon solid solution strengthens ferrite, which increases the yield point and hardness. By adding a certain...

Embodiment 1

[0045] The method for preparing a niobium-containing cast iron-based motor housing of the present application includes the following steps:

[0046] (1) Add pig iron to the smelting furnace for smelting to obtain molten iron. The pig iron smelting temperature is 1510°C and kept for 4 minutes;

[0047](2) Add ferrosilicon, carbon steel scrap, ferromanganese, and copper to the smelting furnace in step (1) in sequence, adjust the temperature of molten iron to 1550°C, keep it warm for 6 minutes, and then lower the temperature to 1490°C. The amount of ferrosilicon added is 1.2% of the mass of pig iron; the added amount of carbon steel scrap is 1% of the mass of pig iron; the added amount of ferromanganese is 0.6% of the mass of pig iron, then add ferromolybdenum and ferroniobium successively, keep warm for 4min, ferromolybdenum and ferroniobium The molybdenum / niobium ratio is 2, and the ferromolybdenum addition is 0.5% of the pig iron mass to obtain composite molten iron;

[0048]...

Embodiment 2

[0055] The method for preparing a niobium-containing cast iron-based motor housing of the present application includes the following steps:

[0056] (1) Add pig iron to the smelting furnace for smelting to obtain molten iron. The pig iron smelting temperature is 1530°C and kept for 6 minutes;

[0057] (2) Add ferrosilicon, carbon steel scrap, ferromanganese, and copper to the smelting furnace in step (1) in sequence, adjust the temperature of molten iron to 1580°C, keep it warm for 8 minutes, and then lower the temperature to 1500°C, and the amount of ferrosilicon added is 1.6% of the mass of pig iron; the added amount of carbon steel scrap is 1.5% of the mass of pig iron; the added amount of ferromanganese is 0.8% of the mass of pig iron; The molybdenum / niobium ratio is 3, and the ferromolybdenum addition is 0.6% of the pig iron mass to obtain composite molten iron;

[0058] (3) The spheroidizing treatment is carried out using a dam-type nodular iron ladle, and an inoculant ...

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Abstract

The invention discloses a preparation method for a niobium-containing cast iron-based motor shell, and relates to the technical field of motor shells. The preparation method comprises the following steps of (1) smelting to obtain molten iron; (2) sequentially adding ferrosilicon, carbon scrap steel, ferromanganese and copper into a smelting furnace, adjusting the temperature of the molten iron, keeping the temperature, then reducing the temperature, then sequentially adding ferromolybdenum and ferrocolumbium, and keeping the temperature to obtain composite molten iron; (3) carrying out spheroidizing treatment by adopting dam type ductile iron ladle, and adding an inoculant into the spheroidized ladle; (4) pouring the composite molten iron into the spheroidized ladle, and carrying out inoculation treatment; and (5) pouring the molten iron subjected to the inoculation treatment in the step (4) into a motor shell mold, carrying out solidifying and molding, and carrying out demolding to obtain the motor shell. The motor shell prepared by the preparation method for the niobium-containing cast iron-based motor shell has excellent heat-conducting property.

Description

technical field [0001] The invention belongs to the technical field of motor casings, and in particular relates to a method for preparing a niobium-containing cast iron-based motor casing. Background technique [0002] A motor is a device that converts electrical energy into mechanical energy. It uses energized coils to generate a rotating magnetic field and acts on the rotor to form a magnetoelectric force rotating torque. Motors are divided into DC motors and AC motors according to the different power sources used. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors. The motor is mainly composed of a stator and a rotor. The direction of the force movement of the current-carrying wire in the magnetic field is related to the direction of the current and the direction of the magnetic induction line. The working principle of the motor is that the magnetic field acts on the force of the current to make the motor rotate. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C21C1/10
CPCC21C1/105C22C33/08Y02P10/20
Inventor 鲍根柱
Owner ANHUI XUANLIDA MOTOR CO LTD
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