Process for manufacturing alloy steel for rail frog

A manufacturing process and alloy steel technology, applied in the direction of manufacturing tools, process efficiency improvement, heat treatment process control, etc., can solve the problems of endangering the safety of train running, accelerating frog damage, fast wear, etc., to reduce the cost of track operation, Faster heating speed and longer service life

Inactive Publication Date: 2012-04-11
WUHU SHANQIAO RAILWAY EQUIP
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0002] The frog of the railway turnout is composed of the frog core rail, the left wing rail and the right wing rail on both sides of the frog core rail, etc. There is a large gap between the frog core rail and the two wing rails, so that the frog core rail tip and the frog core rail A harmful space is formed at the closest part of the working sides of the two wing rails. When the train passes, it will inevitably cause shock and vibration, and the frogs are easy to be damaged. Damage to the frogs will affect the safety of the train. As a result

Method used

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[0030] The following describes the specific embodiments of the present invention in further detail through the description of the best embodiments.

[0031] The manufacturing process of the alloy steel for rail frogs includes the following processes: smelting-casting-forging-heat treatment; specifically;

[0032] (1) Smelting

[0033] In the smelting process, it is necessary to control the proportion of harmful components such as P and S. At the same time, it is necessary to control harmful gases such as N, H, O, etc., to prevent the tensile strength of steel due to the impure removal of inclusions and excessive residual harmful gases. Unqualified performance such as low temperature impact and low temperature impact occurs; smelting is divided into three processes: roughing, refining and vacuum degassing, specifically:

[0034] Rough smelting: use electric arc furnace, add pig iron, scrap steel, recarburizer, silicon carbide into the electric arc furnace; use spectrum analyzer to cont...

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Abstract

The invention discloses a process for manufacturing alloy steel for a rail frog. The process comprises the following steps of: smelting, pouring, forging, and performing heat treatment. The rail frog manufactured by the alloy steel which is manufactured by the manufacturing process has properties such as tensile strength, low-temperature impact properties and the like which are much higher than those of high manganese steel, the service life of the rail frog can be greatly prolonged, and the rail frog is not required to be frequently replaced, so that the operating cost of a rail can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of railway tracks, in particular to a manufacturing process of alloy steel for track frogs. Background technique [0002] The frog of the railway turnout is composed of the frog core rail, the left wing rail and the right wing rail on both sides of the frog core rail, etc. There is a large gap between the frog core rail and the two wing rails, so that the frog core rail tip and the frog core rail A harmful space is formed at the closest part of the working sides of the two wing rails. When the train passes, it will inevitably cause shock and vibration, and the frogs are easy to be damaged. Damage to the frogs will affect the safety of the train. The hardness of the high manganese steel is low at the initial stage, and the wear is fast. In the later stage, due to the continuous rolling of the train, the hardness of the top surface of the frog will continue to increase, and then the frog will peel off blocks, ...

Claims

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Application Information

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IPC IPC(8): C21C5/52C21C7/06C21C7/10C21C7/072C21D9/04C21D1/26C21D1/18C21D11/00C22C38/44
CPCY02P10/20
Inventor 曹桂林张宝华奚正玉王次才王飞汪赵艳钱正秀
Owner WUHU SHANQIAO RAILWAY EQUIP
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