A kind of automobile brake drum and manufacturing method

A technology of automobile braking and manufacturing method, which is applied in the direction of brake drums, etc., can solve the problems of unstable torque during braking of brake pads, unenvironmental production process, short service life, etc., and achieves comfortable braking process without noise and production cost. Low, long service life effect

Active Publication Date: 2017-05-24
CHONGQING TONGLIANG YUHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems in the prior art that the production process of metal, semi-metal and asbestos brake pads is not environmentally friendly, the torque of the brake pads is unstable when braking, the wear resistance is poor, the service life is short, and the noise is large. Brake drum with safety and environmental protection, excellent braking performance and long service life and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Smelting: preparing raw materials, made of raw materials with the following weight ratio: C3.00%, Si1.74%, Mn0.49%, V0.1%, W0.25%, Cr0.45%, Co0.7 %, P0.1%, S0.1%, the balance being Fe; the prepared raw materials were smelted at 1520°C to obtain molten iron;

[0020] b. Inoculation: ①The first inoculation: add 0.1% SiZrSr of the weight of the molten iron for the first inoculation, the inoculation time is 8 minutes, wherein the temperature of the furnace when the molten iron is poured into the ladle is 1480°C, and the inoculant is completely melted Later, the molten iron is transferred to the pouring ladle for inoculation with the flow; ② inoculation with the flow: add 0.1% SiZrSr of the weight of the molten iron in the ladle for inoculation with the flow, the incubation time is 8 minutes, and the temperature of the molten iron is 1450°C.

[0021] c. Casting to obtain the brake drum material.

Embodiment 2

[0023] a. Melting: preparing raw materials, made of the following raw materials in weight ratio: C3.24%, Si1.6%, Mn0.45%, V0.05%, W0.1%, Cr0.38%, Co0.4 %, P0.1%, S0.1%, and the balance is Fe; the prepared raw materials are smelted at 1580°C to obtain molten iron;

[0024] b. Inoculation: ①The first inoculation: add 0.2% BaCaSi of the weight of the molten iron for the first inoculation, the inoculation time is 12 minutes, wherein the temperature of the molten iron is 1500°C when the molten iron is poured into the ladle, and the inoculant is completely melted Later, the molten iron is transferred to the pouring ladle for inoculation with the flow; ② inoculation with the flow: add 0.25% BaCaSi of the weight of the molten iron in the ladle for inoculation with the flow. The incubation time is 12 minutes, and the temperature of the molten iron is 1480°C.

[0025] c. Casting to obtain the brake drum material.

Embodiment 3

[0027] a. Melting: preparation of raw materials, made of the following weight ratios: C3.20%, Si1.70%, Mn0.45%, V0.08%, W0.20%, Cr0.40%, Co0.6 %, P0.1%, S0.1%, and the balance is Fe; the prepared raw materials are smelted at 1550°C to obtain molten iron;

[0028] b. Inoculation: ①The first inoculation: add 0.1% SiZrSr of the weight of the molten iron for the first inoculation, the inoculation time is 10 minutes, wherein the temperature of the molten iron is 1485°C when the molten iron is poured into the ladle, and the inoculant is completely melted Later, the molten iron is transferred to the pouring ladle for inoculation with the flow; ② inoculation with the flow: add 0.20% BaCaSi of the weight of the molten iron in the ladle for inoculation with the flow.

[0029] c. Casting to obtain the brake drum material.

[0030] The actual measurement shows that the strength of the product prepared by the invention reaches 250-300Mpa; the hardness of the braking surface reaches 187-25...

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Abstract

Belonging to a casting material and the casting method field, the invention discloses an automobile brake drum and a manufacturing method, and relates to a making method for an automobile part brake drum. The automobile brake drum is characterized by being prepared from the following raw materials by weight: 3.00-3.24% of C, 1.6-1.74% of Si, 0.45-0.49% of Mn, 0.05-0.1% of V, 0.1-0.25% of W, 0.38-0.45% of Cr, 0.4-0.7% of Co, and the balance Fe and inevitable impurities. By adopting a twice inoculation manufacturing process, the tensile strength and yield strength can be improved, the mechanical properties exceed ordinary grey cast iron brake drum material HT250, the tensile strength reaches more than 250Mpa, and the hardness HBS value reaches over 200, the wear resistance is good, the friction coefficient is high, and the production cost is low, the method can be used for making automobile brake drums and has broad application prospects. The brake drum product prepared by the method has the advantages of sensitive braking, comfortable and noiseless braking process, no damage to brake drum, and long service life.

Description

technical field [0001] The invention relates to a method for manufacturing a brake drum of an automobile part, which belongs to the field of casting materials and casting methods, in particular to an automobile brake drum and a manufacturing method. Background technique [0002] A brake is a device that has the functions of slowing down, stopping or keeping a moving part in a stopped state; it is a mechanical part that can stop or slow down a moving part in a machine. Brakes can be divided into two categories, industrial brakes and automotive brakes. Automobile brakes are further divided into service brakes, parking brakes and balanced booster brakes. In the process of driving, a new type of balanced booster brake is generally used, because the balanced booster brake cooperates with the spiral groove brake drum during driving to keep the car in a balanced state during the entire driving process, and the stability of the brake is also the best among current car brakes. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/00C22C37/06C22C33/08C21D5/00F16D65/10
Inventor 何晓渝
Owner CHONGQING TONGLIANG YUHE IND
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