MC-MX containing precipitated phase high-speed train brake disc cast steel and preparation method

A technology for high-speed trains and precipitated phases, which is applied to the cast steel and preparation of MX-type precipitated phase high-speed train brake discs, including MC, can solve the problems of room temperature strength and toughness and high temperature mechanical properties matching, and achieve the control of room temperature strength and toughness, The effect of good anti-temper coarsening ability and good high-temperature mechanical properties

Active Publication Date: 2020-06-19
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above analysis, the embodiment of the present invention aims to provide a cast steel for high-speed train brake discs containing MC and MX type precipitates and a preparation method thereof, to solve the problem of room temperature strength of cast steel for high-speed train brake discs in the prior art. Matching of Toughness and High Temperature Mechanical Properties

Method used

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  • MC-MX containing precipitated phase high-speed train brake disc cast steel and preparation method
  • MC-MX containing precipitated phase high-speed train brake disc cast steel and preparation method
  • MC-MX containing precipitated phase high-speed train brake disc cast steel and preparation method

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preparation example Construction

[0040] On the other hand, the present invention provides a kind of preparation method that contains MC, MX type precipitation phase high-speed train brake disc cast steel, comprises the following steps:

[0041] Step 1: Prepare resin sand mold;

[0042] Use molding sand, resin, and curing agent, and use three-dimensional geometric entities or 3D printing equipment to prepare resin sand mold components. The part of the sand mold component that contacts the molten steel is painted with zircon powder coating for 1-10 times. After the sand mold is naturally dried and solidified, it is baked at 100-1000°C for 0.05-8h to remove the water in it, and the solid particles in the cavity are removed to form the mold.

[0043] The type of resin includes one or more of furan resin, phenolic resin and epoxy resin. The main purpose of brushing zircon powder is to improve the surface quality of castings and improve the demolding efficiency.

[0044] Step 2: Prepare smelting raw materials, an...

Embodiment 1

[0061] Example 1 of the present invention provides a cast steel for high-speed train brake discs containing MC and MX precipitates, the chemical composition of which is shown in Table 1 in mass percentage.

[0062] Embodiment 1 of the present invention provides a kind of cast steel for high-speed train brake disc containing MC and MX type precipitates, and the preparation includes the following steps:

[0063] Step 1: The phenolic resin sand mold is prepared by using a three-dimensional geometric entity, and the part of the sand mold component that contacts the molten steel is painted with zircon powder coating 3 times. After the sand mold is fully and naturally dried, it is baked at 600°C for 4 hours to fully remove moisture, and the solid particles are fully absorbed by negative pressure.

[0064] Step 2: Smelting the raw materials according to the mass percentage ratio of the cast steel chemical composition in Table 1. Vacuum smelting process is adopted, and the smelting r...

Embodiment 2

[0077] Embodiment 2 of the present invention provides a high-speed train cast steel brake disc containing MC and MX precipitates, and its chemical composition is shown in Table 3 in terms of mass percentage.

[0078] Embodiment 2 of the present invention provides a high-speed train cast steel brake disc containing MC and MX type precipitates, comprising the following steps:

[0079] Step 1: Use three-dimensional geometric entities and 3D printing equipment to prepare phenolic resin sand mold components, and paint the parts of the sand mold components in contact with molten steel with zircon powder paint three times. After the sand mold is naturally dried, it is baked at 600-900°C for 40 minutes to fully remove the water in it, and the solid particles are absorbed to form the mold.

[0080] Step 2: Smelting the raw materials according to the mass percentage ratio of the cast steel chemical composition in Table 3. The smelting process of the intermediate frequency furnace expos...

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Abstract

The invention discloses MC-MX containing precipitated phase high-speed train brake disc cast steel and a preparation method, and belongs to the fields of metal materials and preparation thereof. The problem of matching between room temperature toughness and high temperature mechanical properties of cast steel for high-speed train brake discs in the prior art is solved. The high-speed train brake disc cast steel comprises the chemical components of, by mass percent, 0.20-0.40% of C, 0.30-0.80% of Si, 0.50-2.00% of Mn, 0.50-2.00% of Cr, 0.50-2.00% of Ni, 0.40-1.60% of Mo, 0.01-0.30% of V, 0.01-0.20% of Nb, 0-0.015% of P, 0-0.010% of S, 0-0.010% of O, 0-0.015% of N and the balance Fe and inevitable impurities, wherein the total amount of Mn, Cr and Ni is 2.00-6.00%, and the total amount of Vand Nb is 0.02-0.40%. Through reasonable component design, organization structures and technology control, MC and MX precipitated phases which are fine, in dispersed distribution and excellent in heatstability are obtained, room temperature and high temperature mechanical properties of the high-speed train brake disc cast steel are comprehensively improved, the comprehensive requirements for theroom temperature and high temperature mechanical properties of the cast steel under the condition of high speed pure air emergency braking of a high-speed train are met, and the cast steel is suitablefor being used as cast steel brake discs of a high-speed train high in speed grade per hour.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to cast steel for high-speed train brake discs containing MC and MX precipitates and a preparation method thereof. Background technique [0002] The high-speed train brake disc is the core key component of the basic braking system, and it is the last safety guarantee when the train brake fails. During the braking process of high-speed trains, the temperature of the brake disc will increase significantly, and the braking will generate huge thermal load, thermal shock and thermal cycle, which will lead to the reduction of disc braking efficiency, high temperature wear and thermal fatigue failure. High-performance high-speed train braking Disk development has become a forward-looking key technology for the development of high-speed trains. Aiming at high-speed working conditions, high-speed trains usually use complex heat dissipation structure cast steel brake discs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/48C22C38/46C22C38/44C22C33/04C21D1/18C21D1/32B22D27/04
CPCB22D27/04C21D1/18C21D1/32C22C33/006C22C33/04C22C38/44C22C38/46C22C38/48C22C38/58
Inventor 汤忖江陈蕴博左玲立宋佳健臧玉郡王金南潘鹏
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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