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Casting-forging composite plastic forming process for brake disc

A technology of plastic forming and brake discs, which is applied in the manufacturing industry, can solve the problems of difficult forming of brake discs and unsatisfactory mechanical properties, and achieve the effects of high internal temperature, improved comprehensive mechanical properties, and reduced secondary heating

Active Publication Date: 2016-11-09
南京东电检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latest casting coating technology is adopted to overcome the difficulty of casting adhesion and demoulding technology, protect the mold, and solve the difficulty in forming brake discs made by simple forging, and the mechanical properties of simple casting cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The casting-forging composite plastic forming process of the brake disc of the present invention comprises the following steps,

[0032] Step 1: metal smelting;

[0033] Metal smelting includes the selection of raw materials to ensure that the alloy composition of the raw materials is: carbon 0.25%, silicon 0.032%, manganese 0.57%, vanadium 0.27%, chromium 1.27%, nickel 0.32%, molybdenum 0.72%, and the rest is iron.

[0034] Step 2: Composition analysis;

[0035] Carry out component analysis on the smelted raw materials, smelt the raw materials at 1500-1750°C, check the composition of the melt by sampling after half an hour of smelting, and supplement the components with reduced components, and continue smelting for half an hour after the supplement is completed;

[0036] Step 3: Before pouring, spray a special coating on the cavity of the casting mold, dry and cure it, and then perform an overall preheating treatment. The preheating method is far-infrared heating, and...

Embodiment 2

[0048] The casting-forging composite plastic forming process of the brake disc of the present invention comprises the following steps,

[0049] Step 1: metal smelting;

[0050] Metal smelting includes the selection of raw materials to ensure that the alloy composition of the raw materials is: carbon 0.31%, silicon 0.038%, manganese 0.73%, vanadium 0.33%, chromium 1.33%, nickel 0.38%, molybdenum 0.78%, and the rest is iron;

[0051] Step 2: Composition analysis;

[0052] Carry out component analysis on the smelted raw materials, smelt the raw materials at 1500-1750°C, check the composition of the melt by sampling after half an hour of smelting, and supplement the components with reduced components, and continue smelting for half an hour after the supplement is completed;

[0053] Step 3: Before pouring, spray a special coating on the cavity of the casting mold, dry and cure it, and then perform an overall preheating treatment. The preheating method is far-infrared heating, and...

Embodiment 3

[0065] The casting-forging composite plastic forming process of the brake disc of the present invention comprises the following steps,

[0066] Step 1: metal smelting;

[0067] Metal smelting includes the selection of raw materials to ensure that the alloy composition of the raw materials is: carbon 0.28%, silicon 0.035%, manganese 0.68%, vanadium 0.3%, chromium 1.3%, nickel 0.35%, molybdenum 0.75%, and the rest is iron.

[0068] Step 2: Composition analysis;

[0069] Carry out component analysis on the smelted raw materials, smelt the raw materials at 1500-1750°C, check the composition of the melt by sampling after half an hour of smelting, and supplement the components with reduced components, and continue smelting for half an hour after the supplement is completed;

[0070] Step 3: Before pouring, spray a special coating on the cavity of the casting mold, dry and cure it, and then perform an overall preheating treatment. The preheating method is far-infrared heating, and t...

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PUM

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Abstract

The invention belongs to the field of the manufacturing industry, and specifically discloses a casting-forging composite plastic forming process for a brake disc. The casting-forging composite plastic forming process comprises the following steps of metal smelting: component analyzing; casting; constant-temperature keeping; de-molding; clearing; blank forging; die-forging; de-molding; trimming; stack-cooling; surface treating; mechanical processing; thermal treatment; and finished product assembly. According to the casting-forging composite plastic forming process, internal defects, especially internal shrinkage cavity defects and shrinkage porosity defects, are extremely liable to integrate, and air holes inside a casting can be eliminated by utilizing a liquid curing and heat-release phenomenon, so that comprehensive mechanical property of a forged piece are improved.

Description

technical field [0001] The invention belongs to the field of manufacturing industry, and specifically relates to a casting-forging composite plastic forming process of a brake disc. Background technique [0002] Brake discs are an important guarantee for the safe operation of high-speed trains. With the continuous acceleration of modern high-speed trains, high-speed trains have higher and higher requirements for brake discs. It is mainly reflected in the braking conditions of high-speed trains with high speed and harsh operating conditions. The huge braking thermal load and thermal shock cause a high temperature gradient, which brings high thermal stress, making the brake disc Stress concentration will occur during the process, and after a period of work, the brake disc is prone to breakage, resulting in accidents. Therefore, brake discs need to be improved to meet the requirements of high-speed trains. [0003] When improving the brake disc, it is mainly manifested as imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22C22C38/02C22C38/04C22C38/12C22C38/18C22C38/08B22C3/00B21J5/02
CPCB21J5/02B22C3/00B22C9/22C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
Inventor 曾奇夫曾德文刘建广
Owner 南京东电检测科技有限公司
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