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Steel for elastic wheel rim of tramcar as well as heat treatment method and production method of steel

A heat treatment method and elastic wheel technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems that elastic wheel rims cannot be fully applied, there is no clear and unified steel standard for elastic wheel rims, and there is no disclosure, so as to achieve improvement The effects of service safety, plastic toughness improvement, and low temperature toughness improvement

Active Publication Date: 2021-11-26
MAANSHAN MAGANG JINXI RAIL TRANSPORT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rim performance requirements of the existing tires and rolled steel wheels are not fully applicable to the performance requirements of elastic wheel tires. In ", only LG61 is one material, and only its tensile, hardness and impact properties are required. The testing standards and sampling locations are also different from those of rolled steel wheels. Compared with rolled steel wheels, there are fewer testing items. In the conditions, the requirements of rolling steel and wheel tires are often mixed, and there is no clear and unified steel standard for elastic wheel tires, and there is no disclosure in the prior art how to obtain steel for elastic wheel tires with excellent comprehensive performance

Method used

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  • Steel for elastic wheel rim of tramcar as well as heat treatment method and production method of steel
  • Steel for elastic wheel rim of tramcar as well as heat treatment method and production method of steel
  • Steel for elastic wheel rim of tramcar as well as heat treatment method and production method of steel

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Experimental program
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Effect test

Embodiment 1

[0035] The molten steel whose chemical composition is shown in Example 1 in Table 1 is formed through electric furnace steelmaking process, LF furnace refining process, RH vacuum treatment process, round billet continuous casting process, ingot cutting hot rolling process, heat treatment process, processing, and finished product inspection process. The heat treatment process is as follows: first, heat the wheel at 770°C for 2 hours for normalizing pretreatment, and then heat it at 840±10°C for 2 hours. Tempering at 10°C for 4.5 hours.

[0036] like figure 1 and image 3 , 4 As shown, the metallographic structure of the wheel tire prepared in this example is basically the same as that of the LG61 wheel rim and the CL60 wheel rim, both of which are fine pearlite + a small amount of ferrite. It can be seen from the figure that the ferrite content in this example is significantly higher than Comparative example, and the distribution of ferrite is more uniform. The tire strengt...

Embodiment 2

[0039] The molten steel whose chemical composition is shown in Example 2 of Table 1 is formed through electric furnace steelmaking process, LF furnace refining process, RH vacuum treatment process, round billet continuous casting process, ingot cutting hot rolling process, heat treatment process, processing, and finished product inspection process. The heat treatment process is as follows: first, heat the wheel at 770°C for 2 hours for normalizing pretreatment, and then heat it at 830±10°C for 2 hours. Tempering at 10°C for 4.5 hours.

[0040] like figure 2 and image 3 , 4 As shown, the metallographic structure of the tire prepared in this example is basically the same as that of the LG61 tire and the CL60 steel wheel, both of which are fine pearlite + a small amount of ferrite. It can be seen from the figure that the ferrite content in this example is significantly higher than Comparative example, and the distribution of ferrite is more uniform. The strength and impact ...

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Abstract

The invention discloses steel for an elastic wheel rim of a tramcar as well as a heat treatment method and a production method of the steel. The steel for the elastic wheel rim of the tramcar comprises the following chemical components in percentage by weight: 0.55-0.67% of C, 0.25-0.60% of Si, 0.70-1.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, less than or equal to 0.35% of Cr, less than or equal to 0.20% of V and the balance of Fe and inevitable impurity elements. The strength and hardness levels of the wheel rim are equivalent to those of an LG61 wheel rim and a CL60 wheel, but the ductility and toughness are obviously improved, especially the low-temperature toughness is obviously improved, and the service safety of a wheel is improved.

Description

technical field [0001] The invention belongs to the technical field of steel for wheel tires, and in particular relates to a steel for elastic wheel tires of trams, a heat treatment method and a production method thereof. Background technique [0002] In recent years, urban rail transit has developed rapidly. Modern trams have become a development model for small and medium-sized cities due to their low construction cost, low construction difficulty, high safety factor, and high environmental protection factor. Tram is used as urban rail transit on the ground, and noise reduction is a factor that must be considered. In order to solve the problem of high noise, elastic wheels are widely used in tram traffic in countries all over the world. The elastic wheel is mainly composed of a wheel core, a tire, and elastic rubber between the two. The hoop is elastically supported on the rail, which can effectively reduce vehicle noise, reduce track impact, reduce wheel and rail wear an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/18C22C38/24C21D1/18C21D1/28C21D6/00C21D9/34
CPCC22C38/02C22C38/04C22C38/18C22C38/12C22C38/24C21D1/28C21D1/18C21D6/002C21D6/005C21D6/008C21D9/34C21D2211/005C21D2211/009Y02P10/20
Inventor 邓荣杰陈讲彪刘智潘胜利黄孝卿肖祥
Owner MAANSHAN MAGANG JINXI RAIL TRANSPORT EQUIP
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