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A high-stable friction-resistant train brake disc and its preparation method

A technology of friction resistance and brake discs, which is applied in the direction of friction linings, manufacturing tools, mechanical equipment, etc., can solve the problems of friction stability and low-temperature strength and toughness matching, so as to improve friction instability and improve low-temperature strength. Tough matching, the effect of improving stability

Active Publication Date: 2021-03-30
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the present invention provides a high-stable friction-resistant train brake disc that can solve the problems of high-speed train brake disc friction stability and insufficient low-temperature toughness matching.

Method used

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  • A high-stable friction-resistant train brake disc and its preparation method
  • A high-stable friction-resistant train brake disc and its preparation method
  • A high-stable friction-resistant train brake disc and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-stable friction-resistant train brake disc, in terms of mass percentage, its raw materials and proportioning are as follows:

[0034]

[0035]

[0036] A method for preparing a high-stable friction-resistant train brake disc, comprising the following steps:

[0037] S1. Alloy smelting: using an electric furnace for segmental smelting. First, heat the molten iron to 1650°C to fully melt it to obtain molten steel; The Ti, Mn, V, Cr, W, Mo, Cu, P, S and Nb elements prepared in mass percentage are added to the refining furnace for refining to obtain refined molten steel;

[0038] S2. Alloy casting: adding a crystal forming agent to the refined molten steel, and then casting it into an ingot;

[0039] S3. Alloy composite forging: use free forging to forge the billet; then use the hot-warm intermittent multi-step ring rolling forging process to make the billet to obtain the forged billet;

[0040] S4. Performance heat treatment: The obtained forged billet is su...

Embodiment 2

[0060] A high-stable friction-resistant train brake disc, in terms of mass percentage, its raw materials and proportioning are as follows:

[0061]

[0062] A method for preparing a high-stable friction-resistant train brake disc, comprising the following steps:

[0063] S1. Alloy smelting: using an electric furnace for segmental smelting, firstly heat the molten iron to 1720°C to make it fully melted to obtain molten steel; The Ti, Mn, V, Cr, W, Mo, Cu, P, S and Nb elements prepared in mass percentage are added to the refining furnace for refining to obtain refined molten steel;

[0064] S2. Alloy casting: adding a crystal forming agent to the refined molten steel, and then casting it into an ingot;

[0065] S3. Alloy composite forging: use free forging to forge the billet; then use the hot-warm intermittent multi-step ring rolling forging process to make the billet to obtain the forged billet;

[0066] S4. Performance heat treatment: The obtained forged billet is subjec...

Embodiment 3

[0084] The difference between this embodiment and embodiment 1 is only:

[0085] A highly stable and friction-resistant train brake disc, the raw materials and proportions are as follows in terms of mass percentage: C: 0.15%; Ti: 0.25%; Mn: 0.85%; V: 0.10%; Cr: 2.55%; W: 1.00%; Mo: 0.80%; Cu: 0.70%; P: 0.002%; S: 0.001%; ​​Nb: 3.05%;

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Abstract

The invention discloses a highly stable and friction-resistant train brake disc. The raw materials and proportions thereof are as follows: C: 0.10-0.22%; Ti: 0.21-0.31%; Mn: 0.37-1.21%; V: 0.05-0.15%; Cr: 1.46~3.77%; W: 0.34~1.77%; Mo: 0.65~0.98%; Cu: 0.50~0.80%; P: <0.005%; S: <0.005%; Nb: 2.01~3.78%; quantity. The invention also discloses a preparation method of a highly stable friction-resistant train brake disc. The brake disc of the present invention has low-temperature strength and toughness, and still maintains good friction coefficient stability under the temperature span of +20°C to -60°C, so the brake disc is suitable for long-distance and ambient temperature applications in the north-south region High-speed trains run between areas with large differences.

Description

technical field [0001] The invention relates to a highly stable friction-resistant train brake disc and a preparation method thereof, belonging to the technical field of friction materials for high-speed train braking. Background technique [0002] With the further increase of train speed, it is difficult for cast brake discs to fully meet the requirements of brake safety and reliability, while forged brake discs are expected to be Instead, high-speed trains such as Shinkansen in Japan, TGV in France and ICE in Germany have been successfully equipped with forged steel brake discs to adapt to more severe braking conditions. Japan began to develop split S45C carbon steel forged brake discs in 1965, but due to the presence of a small amount of mixed phases of martensite and bainite in the matrix structure, thermal cracking and brittle failure occurred on the disc surface; in the 1980s, a new brake disc was developed. The integral AISI4330 forged brake disc with fine structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/22C22C38/26C22C38/28C22C38/24C22C38/20C22C33/04C21D9/00C21D1/18C21D1/26F16D69/02
CPCC21D1/18C21D1/26C21D9/0068C21D2211/002C21D2211/008C22C33/04C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28F16D69/027F16D2200/0008F16D2200/0082F16D2250/0007
Inventor 巨佳王章忠张保森朱帅帅胡亮李文莉徐印辉李俊岳凌星
Owner NANJING INST OF TECH
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