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Alloyed cast steel and article made therefrom

a technology of alloyed cast steel and cast iron, which is applied in the field of structural alloyed cast steel, can solve the problems of insignificant increase in the manufacturing cost of such steel compared to prior, and cost increase of 3-7%, and achieves the effects of increasing manufacturing costs, and increasing hardness and wear resistance of surfaces

Inactive Publication Date: 2021-08-26
RAIL 1520 IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a new type of steel that has increased hardness and wear resistance without increasing manufacturing costs. This steel can be used to make friction wipes for freight car trucks, which will have a longer lifespan and can withstand more use without requiring expensive maintenance. The steel can also be easily tempered and hardened to achieve the desired properties.

Problems solved by technology

In particular, higher hardness and wear resistance values were achieved using conventional bulk hardening followed by tempering, and accordingly, the manufacturing cost increase for such steel is insignificant compared to prior art materials; in particular, said cost increase is 3-7% compared to that for 20GL grade steel, for example.

Method used

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  • Alloyed cast steel and article made therefrom

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Effect test

Embodiment Construction

[0010]Comparative tests were carried out in order to determine hardness values for samples made of the steel according to the present invention as compared to the prior art materials used for manufacturing friction wedges: grey cast iron class 25 and steel grade 20GL. The test results are shown in Table 1 below.

TABLE 1Hardness, HBSteel according to the invention418-512Grey cast iron class 25197-260Steel 20GL140-180

[0011]Brinell hardness measurements for the samples were carried out in accordance with the following procedure.

[0012]GOST 9012-59: Metals. Brinell method for measuring hardness.

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Abstract

Disclosed is structural low-alloy manganese cast steel having increased hardness and wear resistance, and an article made therefrom. In particular, after carrying out conventional bulk hardening followed by tempering, the disclosed steel has hardness of approximately 418 to 512 HB and is suitable for use in railway engineering, in particular for manufacturing parts of freight car trucks such as a friction wedge. Due to improved hardness and wear resistance of the parts made of the steel according to the present invention, an increase in inter-repair service life, in particular, of the friction wedge / friction plate friction pair is provided without a significant increase in cost for the parts.

Description

FIELD OF THE INVENTION[0001]The present invention relates to metallurgy, in particular to structural alloyed cast steel suitable for use in railway engineering, in particular in the railway car manufacturing industry.BACKGROUND OF THE INVENTION[0002]With the development of railway engineering, more and more attention is devoted to the development of improved structural materials with increased reliability and durability, which are at the same time relatively inexpensive. Such materials find their use in construction of above ground railways and manufacturing of various parts of the railway rolling stock. Further, the strictest requirements in terms of service reliability are imposed on steel used for railway rails and parts of freight and passenger car trucks, particularly for parts requiring durability and wear resistance, such as center plate discs, wheels and axles of car trucks, friction wedges and friction plates.[0003]A friction wedge for freight car trucks is a part of the sh...

Claims

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Application Information

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IPC IPC(8): C22C38/46C22C38/44C22C38/42C22C38/06C22C38/02C22C38/04C22C38/00B61F5/12
CPCC22C38/46C22C38/44C22C38/42B61F5/122C22C38/02C22C38/04C22C38/002C22C38/06B61F5/00C22C38/20C22C38/22C22C38/24
Inventor SAVUSHKIN, ROMAN ALEKSANDROVICHKYAKK, KIRILL VALTEROVICHBABANIN, VIKTOR SERGEEVICHTERENTEV, MAKSIM IGOREVICHBEZOBRAZOV, IURII ALEKSEEVICHBROITMAN, OLEG ARKADEVICH
Owner RAIL 1520 IP