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A Casting Process of Rare Earth Alloy Brake Disc Castings for High Speed ​​Railway Passenger Cars

A rare earth alloy, high-speed railway technology, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of brake disc fatigue damage, etc., to achieve the effect of fine inclusions, uniform structure, and stable structure

Active Publication Date: 2019-06-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With a temperature difference close to 1000°C, instantaneous alternating cold and heat, and a certain amount of dynamic load, the brake disc is prone to fatigue damage

Method used

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  • A Casting Process of Rare Earth Alloy Brake Disc Castings for High Speed ​​Railway Passenger Cars
  • A Casting Process of Rare Earth Alloy Brake Disc Castings for High Speed ​​Railway Passenger Cars
  • A Casting Process of Rare Earth Alloy Brake Disc Castings for High Speed ​​Railway Passenger Cars

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Experimental program
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Embodiment

[0035] In this embodiment, trial production of high-speed railway passenger car brake disc castings, the material rare earth low alloy steel 30CrMoRE, its specific composition is as follows: C 0.25wt%, Si 0.48wt%, Mn 1.03wt%, Cr 0.87wt%, Ni 1.26wt% , Mo0.51wt%, V 0.04wt%, Nb 0.08wt%, RE 0.05wt%, O 10ppm, N 30ppm, P 0.005wt%, S0.004wt%, the balance is Fe. The weight of the casting rough is respectively: 110kg for the wheel, 143kg for the shaft, 15s for the filling time, and 1560-1570℃ for the pouring temperature.

[0036] Such as Figure 1-Figure 3Shown, the railway passenger car bogie brake disk smelting process scheme of the present invention is as follows:

[0037] 1) Strictly control the ingredients, start with the ingredients, use high-quality scrap steel, metal chromium, low-phosphorus ferromanganese and ferromolybdenum for ingredients, and prepare according to the total amount of molten steel 15 tons. Electric arc furnace smelting, strict control of phosphorus content,...

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Abstract

The invention relates to a rare earth alloy brake disc casting for a high speed railway passenger train, in particular to a casting technology of the rare earth alloy brake disc casting for the high speed railway passenger train. The casting technology mainly includes the steps that the purity of original molten steel is strictly controlled, alloying treatment is conducted on molten steel by usinghigh-purity rare earth alloy or rare earth iron alloy, full zircon sand modeling is used, and the brake disc casting is poured smoothly. By means of a smelting and pouring method of the casting technology, the casting is homogeneous and refined in structure, inclusions are reduced, and the impact toughness and fatigue resistance of a brake disc material are improved, so that the high speed railway passenger train runs more safely and stably.

Description

technical field [0001] The invention relates to a rare earth alloy brake disc casting for a high-speed railway passenger car, in particular to a casting process for a rare earth alloy brake disc casting for a high-speed railway passenger car. Background technique [0002] The brake disc of a high-speed railway passenger car is a key component of the passenger car. It has been running simultaneously with the wheel axle for a long time, and the working conditions are harsh. During the braking process, the brake disc is strongly rubbed by the brake pads, and the temperature of the brake disc rises rapidly, and the surface temperature exceeds 900 °C. The temperature rises instantly, causing the surface to bear huge thermal stress. After the braking section, the temperature of the brake disc will drop rapidly. Driving in the north may drop below -40°C. With a temperature difference close to 1000°C, instantaneous alternation of cold and heat, and a certain amount of dynamic load,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/10B22C1/22C22C33/04C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
CPCB22C1/00B22C1/10B22C1/2253C22C33/04C22C38/005C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
Inventor 栾义坤夏立军王雪东李殿中
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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