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Heat treatment technology for forging coupler yoke

A hooktail frame and process technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of wide heat treatment range, control, unfavorable mechanical performance indicators, etc., achieve stable mechanical performance indicators, reduce heat treatment energy consumption, Optimizing the effect of holding time

Inactive Publication Date: 2014-04-09
HEBEI LUYOU RAILWAY LOCOMOTIVE & ROLLING STOCK PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this material is a special material for hooktail frames, the current heat treatment process parameters are not fixed, and the given heat treatment range is wide, which is not conducive to the actual operation and the control of corresponding mechanical performance indicators.

Method used

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  • Heat treatment technology for forging coupler yoke
  • Heat treatment technology for forging coupler yoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The material of the forged steel part of the hook tail frame in this embodiment is 25MnCrNiMoA low-alloy steel, and its heat treatment process is carried out as follows:

[0021] (1) Quenching: Place the processed forged steel part of the hook tail frame in a heating furnace, heat it to 910°C, keep it warm for 200 minutes, and directly cool it with intense water after keeping it warm;

[0022] ⑵Tempering: Put the forged steel part of the coupler frame after quenching in the tempering furnace, heat it to 530°C, keep it warm for 220 minutes, and then water cool it after keeping it warm.

Embodiment 2

[0024] The material of the forged steel part of the hook tail frame in this embodiment is 25MnCrNiMoA low-alloy steel, and its heat treatment process is carried out as follows:

[0025] (1) Quenching: Place the processed forged steel part of the hook tail frame in a heating furnace, heat it to 930°C, keep it warm for 200 minutes, and directly cool it with intense water after keeping it warm;

[0026] ⑵ Tempering: Put the forged steel part of the coupler frame after quenching in the tempering furnace, heat it to 570°C, keep it warm for 220 minutes, and then cool it with water after keeping it warm.

Embodiment 3

[0028] The material of the forged steel part of the hook tail frame in this embodiment is 25MnCrNiMoA low-alloy steel, and its heat treatment process is carried out as follows:

[0029] (1) Quenching: Place the processed forged steel part of the hook tail frame in a heating furnace, heat it to 910°C, keep it warm for 200 minutes, and directly cool it with intense water after keeping it warm;

[0030] ⑵ Tempering: Put the forged steel part of the coupler frame after quenching in the tempering furnace, heat it to 570°C, keep it warm for 220 minutes, and then cool it with water after keeping it warm.

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Abstract

The invention discloses a heat treatment technology for forging a coupler yoke. Coupler yoke forging steel is 25MnCrNiMoA low-alloy steel. The heat treatment technology comprises the following steps: (1) quenching, to be specific, putting the machined coupler yoke forging steel in a heating furnace, heating to 910-930 DEG C, carrying out heat preservation for 200 minutes, and then directly carrying out intense water cooling; and (2) tempering, to be specific, putting the quenched coupler yoke forging steel in a tempering furnace, heating to 530-570 DEG C, carrying out heat preservation for 220 minutes, and then carrying out water cooling. The heat treatment technology for forging the coupler yoke, provided by the invention, is reasonable in technological design and can be used for obtaining the coupler yoke which has a relatively stable microstructure and is balanced and stable in mechanical performance indexes.

Description

technical field [0001] The invention belongs to the technical field of coupler frame manufacture, and in particular relates to a forged coupler frame heat treatment process. Background technique [0002] The coupler frame is the key part of the coupler-buffer device of railway wagon. The hook and buffer device plays the role of connecting the locomotive and the vehicle, and between the vehicle and the vehicle, and transmits and relieves the longitudinal traction force or impact force generated during the operation of the train. A low-alloy high-strength 25MnCrNiMoA is used in the forgings of the coupler frame of railway wagons. Different heat treatment parameter settings will result in different mechanical properties. Since this material is a special material for hooktail frames, the current heat treatment process parameters are not fixed, and the given heat treatment range is wide, which is not conducive to the actual operation and the control of corresponding mechanical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/00
Inventor 赵会妙赵维宗张建武李春海李海涛王燕
Owner HEBEI LUYOU RAILWAY LOCOMOTIVE & ROLLING STOCK PARTS
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