Method for manufacturing high carbon steel wheel

A manufacturing method and high-carbon steel technology, which is applied in the manufacture of tools, furnaces, heat treatment equipment, etc., can solve the problems of adverse effects on safety performance, reduced crack growth resistance inside the wheel, and decreased impact toughness, etc., to achieve prolonged and effective dehydrogenation The effects of time, increasing difficulty, and increasing impact energy at room temperature

Active Publication Date: 2010-09-01
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0003] The room temperature microstructure of conventional CL60 steel wheels is ferrite-pearlite. The remarkable characteristics of this steel are: the increase in strength and hardness will lead to a decrease in impact toughness, thereby reducing the internal crack growth resistance of the wheel. When the wheel is in service When subjected to the complex wheel-rail interaction force during the process, it will have an adverse effect on the safety performance of the use

Method used

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  • Method for manufacturing high carbon steel wheel
  • Method for manufacturing high carbon steel wheel
  • Method for manufacturing high carbon steel wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The technical process and technical parameters of the high carbon steel wheel manufacturing method are:

[0039] Heating the C-Mn high-carbon steel wheel billet with the composition shown in Table 1 to 1270°C to 1290°C according to the conventional process;

[0040] High-carbon steel wheel workpieces are made by conventional high-temperature forging and rolling;

[0041] Air-cool the workpiece to a certain temperature range below point A1, and the infrared thermometer detects that the surface temperature of the wheel rim is 632°C, indicating that the wheel body has completed pearlite transformation;

[0042] Put the high-carbon steel wheel workpiece into the isothermal furnace and heat it to 730°C-750°C for 30 minutes to make the wheel rim undergo partial austenite transformation;

[0043] Cool the high-carbon steel wheel workpiece furnace to 600℃~630℃, so that the pearlite transformation of the wheel rim occurs at a higher temperature, and the temperature change of th...

Embodiment 2

[0052] The technical process and technical parameters of the high carbon steel wheel manufacturing method are:

[0053] Heating the C-Mn high-carbon steel wheel billet with the composition shown in Table 1 to 1270°C to 1290°C according to the conventional process;

[0054] Then through conventional high-temperature forging and rolling into high-carbon steel wheel workpiece;

[0055] Air-cool the workpiece to a certain temperature range below point A1, and the infrared thermometer detects that the surface temperature of the wheel rim is 647°C, indicating that the wheel body has completed pearlite transformation;

[0056] Then put the high-carbon steel wheel workpiece into the isothermal furnace and heat it to 730°C-750°C for 40 minutes to make the wheel rim undergo partial austenite transformation;

[0057] Then the high-carbon steel wheel workpiece furnace was cooled to 600 ℃ ~ 630 ℃, so that the pearlite transformation of the rim of the wheel occurred at a higher temperature...

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Abstract

The invention discloses a method for manufacturing a high carbon steel wheel. A preheating treatment process is set after a forging, stamping and rolling process and before an isothermal process. The process method comprises the following steps of: performing air cooling on the high carbon steel wheel workpiece after being subjected to high temperature forging, stamping and rolling to between 600 and 650 DEG C; heating the high carbon steel wheel workpiece, wherein the heating temperature is between 730 and 750 DEG C; and the heating time is 30 to 40 minutes; performing part of austenite transformation on a wheel rim; performing furnace cooling on the high carbon steel wheel workpiece to between 600 and 630 DEG C; and performing the isothermal process on the wheel workpiece. By adopting the technical scheme, the hydrogen content is reduced, and a hydrogen induced crack is inhibited; and the impact toughness of the high carbon steel wheel rim is effectively improved and the use safety of the product is ensured on the premise of ensuring the intensity and the rigidity of the high carbon steel wheel workpiece basically unchanged and a ferrite-pearlite microscopic structure.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry production, and relates to the manufacturing technology of railway wheels, more specifically, the invention relates to a method for manufacturing high-carbon steel wheels. Background technique [0002] From the perspective of the evolution process of the standards for domestic railway passenger car wheels, the national standard "Rolled Steel Rolled Wheels for Railways" (GB8601-88) was promulgated and implemented in 1988, which is applicable to railway passenger cars with a running speed of ≤80km / h before the speed increase of my country's railways Wheels for vehicles; "Technical Conditions for Railway Express Passenger Car Rolling Steel Integral Wheels" (TB / T2708-1996) promulgated in 1996 replaced GB8601-88, which is mainly applicable to railway passenger cars with a running speed of ≤160km / h after the speed increase of my country's railways wheel. The composition requirements of con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00C21D9/34C21D1/18C22C38/04
Inventor 陈刚江波王世付李翔赵海钟斌程德利张坤
Owner MAANSHAN IRON & STEEL CO LTD
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