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Casting method of SiO2-reinforced nodular cast iron-based brake disc

A nodular cast iron and brake disc technology, which is applied in the casting field of brake discs, can solve the problems of reduced service life of brake blocks, high requirements for prefabricated blocks, and wear of brake blocks, so as to improve wear resistance, service life, The effect of excellent comprehensive performance

Inactive Publication Date: 2012-03-07
陈均
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its technology can achieve a certain anti-wear effect, but because the Mohs hardness of the added ceramic particles is about 9, the high hardness of the reinforced phase will cause serious wear and tear on the brake pads on the brake caliper, resulting in that although the brake disc Increased service life, but significantly reduced brake pad service life
Moreover, its casting and infiltration process has high requirements for the production of prefabricated blocks, and the process is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A SiO 2 A method for casting reinforced nodular cast iron-based brake discs, the method comprising the following steps:

[0020] 1). SiO2 2 Particle selection: choose SiO with a particle size of 100-150 mesh and 200-320 mesh 2 Particles, wherein 120-150 mesh accounts for 30% and 200-320 mesh accounts for 70% in weight percentage;

[0021] 2). Ductile iron selection: by weight percentage, containing C: 3.4-3.6%, Si: 2.35-2.65%, Mn: 1.4-1.6%, P: ≤0.1%, S: ≤0.02%, and the rest is iron;

[0022] 3). Preparation of sand molds: using green sand molding process to produce, using surface sand in production to obtain higher sand mold hardness and wet strength of mold sand; using CO 2 Water glass sand molding process molding.

[0023] 4). Melting and pouring: melt the cast iron according to the conventional method at a temperature of 1520°C, and control the above components, then add nodulizer and inoculant, and add SiO which accounts for 6% of the mass of nodular cast iron a...

Embodiment 2

[0026] A SiO 2 A method for casting reinforced nodular cast iron-based brake discs, the method comprising the following steps:

[0027] 1). SiO2 2 Particle selection: choose SiO with a particle size of 100-150 mesh and 200-320 mesh 2 Particles, wherein 120-150 mesh accounts for 40% and 200-320 mesh accounts for 60% in weight percentage;

[0028] 2). Ductile iron selection: by weight percentage, containing C: 3.4-3.6%, Si: 2.35-2.65%, Mn: 1.4-1.6%, P: ≤0.1%, S: ≤0.02%, and the rest is iron;

[0029] 3). Preparation of sand molds: using green sand molding process to produce, using surface sand in production to obtain higher sand mold hardness and wet strength of mold sand; using CO 2 Water glass sand molding process molding.

[0030] 4). Melting and pouring: melt the cast iron according to the conventional method at a temperature of 1550°C, and control the above components, then add nodulizer and inoculant, and add SiO accounting for 8% of the mass of nodular cast iron at th...

Embodiment 3

[0033] A SiO 2 A method for casting reinforced nodular cast iron-based brake discs, the method comprising the following steps:

[0034] 1). SiO2 2 Particle selection: choose SiO with a particle size of 100-150 mesh and 200-320 mesh 2 Particles, wherein 120-150 mesh accounts for 50% and 200-320 mesh accounts for 50% in weight percentage;

[0035] 2). Ductile iron selection: by weight percentage, containing C: 3.4-3.6%, Si: 2.35-2.65%, Mn: 1.4-1.6%, P: ≤0.1%, S: ≤0.02%, and the rest is iron;

[0036] 3). Preparation of sand molds: using green sand molding process to produce, using surface sand in production to obtain higher sand mold hardness and wet strength of mold sand; using CO 2 Water glass sand molding process molding.

[0037] 4). Melting and pouring: Melt the cast iron according to the conventional method at a temperature of 1550°C, and control the above components, then add nodulizer and inoculant, and add SiO accounting for 10% of the mass of nodular cast iron at t...

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Abstract

The invention discloses a casting method of a SiO2-reinforced nodular cast iron-based brake disc. The casting method comprises five steps of SiO2 particle selection, nodular cast iron selection, sand mold preparation, melting and pouring, and cooling and cleaning. The casting method has the advantages that the SiO2-reinforced nodular cast iron-based brake disc obtained by the casting method does not wear brake blocks; SiO2 particles adopted by the casting method are combined according to different particle sizes, are uniformly distributed in a nodular cast iron matrix in a way that large particles and small particles are arranged alternately and have a certain support effect on the nodular cast iron matrix, and thus brake disc wear resistance is greatly improved and a brake disc service life is prolonged; and the casting method is simple and is easy.

Description

technical field [0001] The invention relates to the field of casting, in particular to a casting method of a brake disc. Background technique [0002] The brake disc is an essential part of all vehicle braking systems. It is fixed on the axle and rotates with the wheel. When braking, the brake block is pressed onto the brake disc under the push of the caliper piston. Through the brake block and the The friction between the brake discs reduces the wheel speed to achieve the purpose of vehicle deceleration and braking. Brake discs are first seen on foreign cars. As far as their use is concerned, they belong to the category of friction brakes, which is a device that converts the kinetic energy of the vehicle into heat through friction and then dissipates it into the atmosphere. Compared with traditional drum radiators, it has better heat dissipation performance, is suitable for high-speed driving, and has a linear effect on pedal force. Therefore, it has been partially adopte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C33/08F16D69/02F16D65/12
Inventor 陈伟军
Owner 陈均
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