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High-speed train alloy cast steel brake disc material and smelting process thereof

A technology of alloy cast steel and high-speed trains, applied in the field of metal materials, can solve the problems of non-wear-resistant brake friction surfaces, short service life, poor toughness, etc., and achieve less debris inclusions, low production costs, and good wear resistance Effect

Active Publication Date: 2013-07-24
SHANDONG HAOAN GOLDTECH NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the brake discs currently produced still have the disadvantages of non-wear-resistant brake friction surfaces, poor toughness, short service life, and high cost.

Method used

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  • High-speed train alloy cast steel brake disc material and smelting process thereof
  • High-speed train alloy cast steel brake disc material and smelting process thereof
  • High-speed train alloy cast steel brake disc material and smelting process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The molten steel is smelted in a 500Kg medium-frequency induction furnace, and the manufacturing process steps are as follows:

[0022] (1) Load high-quality steel ingots with a size of 70cm2, and add them in two times;

[0023] (2) Electric melting, allowing the use of the maximum power to melt the steel ingot. When the temperature of the molten steel rises to 1500-1520°C, add elements: carbon, ferromolybdenum, ferrochromium, nickel, zirconium, vanadium, and continue to heat up. With the melting of the steel ingot, Pound the charge at any time to avoid bridging, and add steel ingots for the second time;

[0024] (3) When the molten steel temperature rises to 1550-1560°C, add ferrosilicon;

[0025] (4) When the molten steel temperature rises to 1580-1590°C, add ferromanganese;

[0026] (5) Take samples for analysis, and adjust the chemical composition according to the analysis results;

[0027] (6) When the molten steel temperature rises to 1650-1670°C, stop the powe...

Embodiment 2

[0033] Melting molten steel with a 1000Kg intermediate frequency induction furnace, the manufacturing process steps are:

[0034] (1) Load high-quality steel ingots with a size larger than 80mm2, and add them in two times;

[0035] (2) Electric melting, allowing the use of the maximum power to melt the steel ingot. When the molten steel temperature rises to 1550-1560 ° C, add elements: carbon, ferromolybdenum, ferrochromium, nickel, zirconium, vanadium, and then continue to heat up, as the ingot melts , beat the charge at any time to avoid bridging, and add steel ingots for the second time;

[0036] (3) When the molten steel temperature rises to 1570-1580°C, add ferrosilicon;

[0037] (4) When the molten steel temperature rises to 1590-1600°C, add ferromanganese;

[0038] (5) Take samples for analysis, and adjust the chemical composition according to the analysis results;

[0039] (6) When the molten steel temperature rises to 1650-1660°C, stop the power supply, insert 0.5K...

Embodiment 3

[0045] Using a 5000Kg intermediate frequency induction furnace to make molten steel, the manufacturing process steps are:

[0046] (1) Load high-quality steel ingots, the size of which is not greater than 120mm2, and add in two times;

[0047] (2) Electric melting, allowing the use of the maximum power to melt the steel ingot. When the molten steel temperature rises to 1540-1550 ° C, add elements: carbon, ferromolybdenum, ferrochromium, nickel, zirconium, vanadium, and then continue to heat up, as the ingot melts , beat the charge at any time to avoid bridging, and add steel ingots for the second time;

[0048] (3) When the molten steel temperature rises to 1560-1570°C, add ferrosilicon;

[0049] (4) When the molten steel temperature rises to 1580-1590°C, add ferromanganese;

[0050] (5) Take samples for analysis, and adjust the chemical composition according to the analysis results;

[0051] (6) When the molten steel temperature rises to 1640-1650°C, stop the power supply,...

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Abstract

The invention relates to a high-speed train alloy cast steel brake disc material and a smelting process thereof. The material is composed of iron, carbon, silicon, manganese, chromium, nickel, molybdenum, vanadium, niobium, tungsten, titanium, aluminum, copper, zirconium, phosphorus, sulfur, and the like. The components are mixed according to a certain formula, and smelting is carried out with an acidic high-frequency or medium-frequency induction furnace. The production process provided by the invention is simple. A workpiece obtained after heat treatment has hardness of RC39-45, tensile strength of 1100-1200MPa, yield strength of 1000-1100MPa, and an elongation rate of 7%. The material has good impact strength, good wear resistance, low production cost, and good casting performance.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-speed train alloy cast steel brake disc material and a melting process. Background technique [0002] At present, the brake discs used in domestic high-speed trains are the main consumable parts of high-speed trains, and their quality directly affects the safety performance and economic benefits of high-speed trains. However, most of the brake discs produced at present mainly have the disadvantages of non-wear-resistant brake friction surfaces, poor toughness, short service life, and high cost. Contents of the invention [0003] The object of the present invention is to provide a high-speed train alloy cast steel brake disc material and its melting process. The hardness of the present invention is HRC38-42, the tensile strength is 1050-1150Mpa, the yield strength is 980-1050Mpa, and the elongation is δs =6.5—7%. [0004] The purpose of the present invention can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/52C22C33/06
Inventor 刘宗安王兢丁玉臣
Owner SHANDONG HAOAN GOLDTECH NEW MATERIALS
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