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Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains

A heat treatment method, high-speed railway technology, applied in the direction of heat treatment furnace, heat treatment equipment, furnace type, etc., can solve the problem that the key heat treatment process technology for manufacturing axles is not given

Active Publication Date: 2010-10-13
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two documents both give the chemical composition and mechanical performance requirements, and neither gives the key heat treatment process technology for manufacturing the axle

Method used

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  • Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains
  • Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains
  • Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At 920°C, hold for 4 hours and then air cool, then hold at 900°C for 4 hours and then water quench, and hold at 640°C for 6 hours and then air cool.

Embodiment 2

[0020] At 910°C, hold for 4 hours and then air cool, then hold at 910°C for 5 hours and then water quench, and hold at 650°C for 6 hours and then air cool.

Embodiment 3

[0022] 920°C, keep warm for 3 hours, then air cool, then keep warm at 920°C for 3 hours, then water quench, keep warm at 650°C for 6 hours, then air cool.

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PUM

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Abstract

The invention belongs to the technical field of heat treatment, relating to a heat treatment method for materials of a 25CrMo alloy steel hollow car axle for high-speed railway passenger trains. The heat treatment method is characterized in that 900 to 930 DEG C pretreatment is carried out on 25CrMo steel of the size of an axle blank, quench treatment is carried out at 880 to 930 DEG C, and then tempering treatment is carried out at 630 to 680 DEG C. The invention has the advantages that the mechanical property of the developed 25CrMo alloy steel hollow car axle for the high-speed railway passenger trains meets the EN 13261 standard requirement, and especially the fatigue strength of a smooth sample and the fatigue strength of a notch sample are both higher than the standard values. The invention provides the technical assurance of the heat treatment technique for the final production of the hollow car axle with the high speed of 200 to 350 km / h.

Description

technical field [0001] The invention relates to heat treatment of 25CrMo alloy steel hollow axles for high-speed railway passenger cars with a speed of 200-350 kilometers per hour, and belongs to the field of heat treatment technology for alloy steel hollow axle materials for high-speed railway passenger cars. Background technique [0002] High-speed railway refers to a railway with a maximum operating speed of more than 200km per hour. It not only brings about the revitalization of the traditional railway industry, but also promotes the revival of other industries and promotes the economic development of the entire society. In order to meet the growing needs of domestic railway transportation, my country's railway transportation has been speeded up many times. When the speed is lower than 160km per hour, most of the railway axles are solid axles treated with medium carbon steel normalizing, and our country already has the relevant technology. But before the present inventi...

Claims

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Application Information

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IPC IPC(8): C21D9/28C21D1/18C21D1/60
Inventor 朱静刘淑华刘韶庆潘涛李辉周惠华林吉忠鲁天喜顾家琳汝继来施惠基蔡明春蒙元生梁多多段政穆恩生张洪
Owner TSINGHUA UNIV
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