Alloy steel forged brake disc with characteristics of inhibiting friction sparks and manufacturing method of alloy steel forged brake disc

A manufacturing method and technology of alloy steel, applied in the directions of brake discs, friction linings, metal rolling, etc., can solve the problems of complex train operating environment, easy generation of micro-cracks in alloys, poor material bonding performance, etc., and reduce the friction of forgings. The tendency of spark generation, the suppression of friction spark characteristics, the effect of reducing the grain size

Active Publication Date: 2020-08-07
NANJING INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SiC and Al 2 o 3 As an external heterogeneous strengthening phase, the alloy is prone to microcracks and other defects during the forging process. At the same time, its bonding performance with the brake disc matrix material is poor, and the friction surface SiC and Al in the friction braking process 2 o 3 The heterogeneous particles are easy to peel off and even cause the wear debris on the disk surface to peel off. The tiny particles that fall off the disk surface are especially rich in Fe 3 Phase C particles are prone to deflagration in the air due to high temperature, which will generate friction sparks and accelerate the wear of the disk surface
my country has a vast territory, and the train operating environment is complex. When the train is running in a biogas environment or transporting oil and gas resources, the sparks generated by friction braking can easily ignite combustible gases in the environment, and even cause explosions, resulting in serious safety accidents

Method used

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  • Alloy steel forged brake disc with characteristics of inhibiting friction sparks and manufacturing method of alloy steel forged brake disc
  • Alloy steel forged brake disc with characteristics of inhibiting friction sparks and manufacturing method of alloy steel forged brake disc
  • Alloy steel forged brake disc with characteristics of inhibiting friction sparks and manufacturing method of alloy steel forged brake disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The alloy steel forged brake disc of the present embodiment and its processing steps are as follows:

[0031] Alloy steel forged brake disc with anti-friction spark characteristics, the components and their mass percentages are: C: 0.1, Cr: 1.0, Mo: 1.0, W: 0.5, Mn: 0.2, Ti: 0.1, Cu: 0.5, Nb: 0.05, V: 0.05, N: 0.005, RE: 0.001, P: ≤0.005, S: ≤0.02; the balance is Fe and unavoidable impurities.

[0032] A method for manufacturing an alloy steel forged brake disc with the characteristic of suppressing frictional sparks, comprising the following steps:

[0033] (1) Forging forming: ① The above-mentioned components are made into alloy steel, and the alloy steel is opened by free forging. The initial forging temperature of free forging is 1250 ° C, and the final forging temperature is 1100 ° C; For billet making, the deformation of the first rolling ring is 60%, the final forging temperature is 1158°C, and the interval is 100s, and the second ring rolling is carried out, th...

Embodiment 2

[0036] The alloy steel forged brake disc of the present embodiment and its processing steps are as follows:

[0037] Alloy steel forged brake disc with the characteristic of suppressing friction sparks, the components and their mass percentages are: C: 0.15, Cr: 1.5, Mo: 2.0, W: 1.0, Mn: 0.8, Ti: 0.5, Cu: 0.8, Nb: 0.1, V: 0.1, N: 0.015, RE: 0.008, P: ≤0.005, S: ≤0.02; the balance is Fe and unavoidable impurities.

[0038] A method for manufacturing an alloy steel forged brake disc with the characteristic of suppressing frictional sparks, comprising the following steps:

[0039] (1) Forging forming: ① The above-mentioned components are made into alloy steel, and the alloy steel is opened by free forging. The initial forging temperature is 1250 ° C, and the final temperature is 1100 ° C; The deformation of the rolling ring is 60%, the final forging temperature of the first rolling ring is 1160°C, and the interval is 50s, and the second ring rolling is carried out, the deformati...

Embodiment 3

[0042] The alloy steel forged brake disc of the present embodiment and its processing steps are as follows:

[0043] Alloy steel forged brake disc with the characteristic of suppressing friction sparks, the components and their mass percentages are: C: 0.12, Cr: 1.2, Mo: 1.5, W: 0.8, Mn: 0.5, Ti: 0.3, Cu: 0.7, Nb: 0.08, V: 0.07, N: 0.010, RE: 0.005, P: ≤0.005, S: ≤0.02; the balance is Fe and unavoidable impurities.

[0044] A method for manufacturing an alloy steel forged brake disc with the characteristic of suppressing frictional sparks, comprising the following steps:

[0045] (1) Forging molding: ① The above-mentioned components are made into alloy steel, and the alloy steel is opened by free forging. The initial forging temperature of free forging is 1250 °C, and the terminal temperature is 1100 °C; For the billet, the first ring rolling deformation is 70%, the final forging temperature is 1178°C, and the interval is 30s, and the second ring rolling is carried out, the d...

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Abstract

The invention discloses an alloy steel forged brake disc with characteristics of inhibiting friction sparks. The alloy steel forged brake disc with the characteristics of inhibiting the friction sparks is prepared from the following components in mass by percentage: 0.1-0.15 of C, 1.0-1.5 of Cr, 1.0-2.0 of Mo, 0.5-1.0 of W, 0.2-0.8 of Mn, 0.1-0.5 of Ti, 0.5-0.8 of Cu, 0.05-0.1 of Nb, 0.05-0.1 of V, 0.005-0.015 of N, 0.001-0.008 of RE, less than or equal to 0.005 of P, less than or equal to 0.02 of S and the balance of Fe and inevitable impurities. The invention further discloses a manufacturing method of the alloy steel forged brake disc with the characteristics of inhibiting the friction sparks. Special alloy steel is designed. Through forging and heat treatment processes, the brake dischas excellent strength and toughness, the high-temperature mechanical property, the wear resistance and the thermal crack resistance, and has good characteristics of inhibiting the friction sparks.

Description

technical field [0001] The invention relates to an alloy steel forged brake disc capable of suppressing frictional sparks and a manufacturing method thereof, belonging to the technical field of metal forging and heat treatment. Background technique [0002] With the continuous development and progress of the national economy and science and technology, the railway and highway transportation industries are gradually developing towards high-speed, heavy-duty and complex environments. As key components of transportation equipment, the working conditions of friction brake discs are increasingly Harsh, the safe and stable operation of the brake disc is the guarantee for the safe operation of transportation. [0003] When the friction brake disc is running, it mainly converts the kinetic energy of the train into frictional heat through the friction between the disc surface and the brake pads. This process has the characteristics of rapid temperature rise in a short time. Therefore...

Claims

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Application Information

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IPC IPC(8): C22C38/28C22C38/26C22C38/24C22C38/22C22C38/20C22C38/04C21D8/00C21D1/26C21D1/25B21H1/06F16D65/12F16D69/02
CPCB21H1/06C21D1/25C21D1/26C21D8/005C21D2211/001C21D2211/002C21D2211/008C22C38/001C22C38/002C22C38/005C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28F16D65/12F16D69/027F16D2200/0021F16D2250/0023
Inventor 王章忠朱帅帅张保森胡谦巨佳巴志新陶学伟
Owner NANJING INST OF TECH
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