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Welding process of alloy steel and trough type steel rail

A technology of welding process and grooved steel rail, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor mechanical properties of welded joints and cracks on the rail waist of welded joints, so as to achieve stable welding quality and improve unevenness Uneven conditions, the effect of enhancing the breaking load

Active Publication Date: 2019-08-09
CNR BEIJING RAIL EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of poor mechanical properties of the welded joint formed by welding the alloy steel and the grooved steel rail in the prior art by the mobile flash welding method, and the rail waist of the welded joint is prone to cracks, thereby providing an alloy steel and channel rail Welding process of channel rail

Method used

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  • Welding process of alloy steel and trough type steel rail
  • Welding process of alloy steel and trough type steel rail
  • Welding process of alloy steel and trough type steel rail

Examples

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Embodiment 1

[0030] This embodiment provides a welding process for alloy steel (59R2 rail type, bainitic alloy steel) and channel rail (59R2 rail type, U75V rail), using GAA100 / 580 flash welding machine, and the shell is welded by the flash welding method. Butt welded steel alloy steel (length 600mm) and U75V grooved steel rail (length 600mm) together, including flash-flat stage, preheating stage, burning stage, upsetting stage and post-heating stage, the total duration of the welding process The time is 114s, the upsetting amount of the welding process is 12mm, and the total rail consumption of the welding process is 30mm.

[0031] Wherein, the rail consumption in the flashing stage is 4mm, and the duration is 32s.

[0032] The number of times of heating in the preheating stage is 8 times, the duration is 50s, and the preheating temperature is 1250°C.

[0033] The rail consumption in the sintering stage is 14mm, and the duration is 19s.

[0034] The upsetting pressure in the upsetting s...

Embodiment 2

[0041]This embodiment provides a welding process for alloy steel (59R2 rail type, bainitic alloy steel) and channel rail (59R2 rail type, U75V rail), using GAA100 / 580 flash welding machine, and the shell is welded by the flash welding method. Butt welded steel alloy steel (length 600mm) and U75V grooved steel rail (length 600mm) together, including flash-flat stage, preheating stage, burning stage, upsetting stage and post-heating stage, the total duration of the welding process The time is 115s, the upsetting amount of the welding process is 12.8mm, and the total rail consumption of the welding process is 31.8mm.

[0042] Wherein, the rail consumption in the flash-flat stage is 4.5mm, and the duration is 31s.

[0043] The number of times of heating in the preheating stage is 10 times, the duration is 50s, and the preheating temperature is 1350°C.

[0044] The rail consumption in the sintering stage is 14.5mm, and the duration is 18s.

[0045] The upsetting pressure in the u...

Embodiment 3

[0052] This embodiment provides a welding process for alloy steel (59R2 rail type, bainitic alloy steel) and channel rail (59R2 rail type, U75V rail), using GAA100 / 580 flash welding machine, and the shell is welded by the flash welding method. Butt welded steel alloy steel (length 600mm) and U75V grooved steel rail (length 600mm) together, including flash-flat stage, preheating stage, burning stage, upsetting stage and post-heating stage, the total duration of the welding process The time is 114s, the upsetting amount of the welding process is 12mm, and the total rail consumption of the welding process is 31mm.

[0053] Wherein, the rail consumption in the flash-flat stage is 4.5mm, and the duration is 31s.

[0054] The number of times of heating in the preheating stage is 9 times, the duration is 49s, and the preheating temperature is 1300°C.

[0055] The rail consumption in the sintering stage is 14.5mm, and the duration is 18s.

[0056] The upsetting pressure in the upset...

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Abstract

The invention relates to the technical field of tracked trolley bus frog welding, in particular to a welding process of alloy steel and a trough type steel rail. According to the welding process of the alloy steel and the trough type steel rail, the alloy steel and the trough type steel rail are welded together through a flash welding method; the welding process comprises a flash levelling stage,a preheating stage, a burning stage, an upset forging stage and a postheating stage; the total duration time of the welding process is 114s to 115s; the upset forging amount of the welding process is12mm to 12.8mm; and the total consumption amount of the steel rail of the welding process is 30 to 31.8mm. According to the welding process of the alloy steel and the trough type steel rail provided by the invention, the flash welding of the alloy steel and the trough type steel rail is realized successfully, the mechanical property of a formed welding joint is good, and the welding quality is stable.

Description

technical field [0001] The invention relates to the field of trolley frog welding technology, in particular to a welding process of alloy steel and grooved steel rail. Background technique [0002] Urban trams have always been one of the main means of transportation for the development of many cities in the world. With the rapid development of transportation in China, many large and medium-sized cities in my country are forced by the serious situation of "blockage, noise, pollution" and financial constraints. Modern tram projects are inevitable to alleviate the embarrassing situation they are currently facing. [0003] Frogs are one of the weakest and most damaged track components in the track structure due to the presence of harmful spaces, and are expected to have good strength, toughness, contact fatigue resistance, and weldability. At present, domestic railway fixed frogs are divided into high manganese steel frogs and alloy steel frogs. Traditional high-manganese stee...

Claims

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Application Information

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IPC IPC(8): B23K11/04
CPCB23K11/04
Inventor 张立军姜丽丽尉小明闫佳智学元乔红梅李向前丁志敏
Owner CNR BEIJING RAIL EQUIP
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