Wheel steel applicable to railway wagon and wheel preparation method

A railway locomotive and wheel steel technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems such as abnormal wheel flange wear, abnormal tread wear, tread peeling, etc., and achieve good results in actual operation

Active Publication Date: 2014-03-19
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the follow-up survey on the use of high-power locomotives in various railway bureau sections, the main problems existing in foreign high-power locomotive wheels are tread peeling, abnormal tread wear and abnormal wheel rim wear

Method used

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  • Wheel steel applicable to railway wagon and wheel preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The molten steel whose chemical composition is shown in Example 1 in Table 1 is formed through converter steelmaking process, LF furnace refining process, VD vacuum treatment process, round billet continuous casting process, ingot cutting and rolling process, heat treatment process, processing, and finished product inspection process. The comparative example is a locomotive wheel imported from abroad. Example 1 is carried out according to the heat treatment scheme proposed by the present invention. The heat treatment process is as follows: the temperature is raised to 880°C with the furnace, and the temperature is kept at 880°C for 3.5 hours. The wheel is heated to 860°C with the furnace, and after 4 hours of heat preservation, it is cooled by spraying water through the inclined nozzle for 400 seconds, and then it is kept at 480°C for 5 hours, and then it is air-cooled.

[0027] The mechanical properties of the rim are shown in Table 2, and it can be seen from Table 2 th...

Embodiment 2

[0029] The molten steel whose chemical composition is shown in Example 2 of Table 1 is formed through converter steelmaking process, LF furnace refining process, VD vacuum treatment process, round billet continuous casting process, ingot cutting and rolling process, heat treatment process, processing, and finished product inspection process. The comparative example is a locomotive wheel imported from abroad. Example 2 is carried out according to the heat treatment scheme proposed by the present invention. The heat treatment process is as follows: heat up to 870°C with the furnace, heat it at 870°C for 3 hours, and then take it out of the furnace and air cool it to room temperature about 20°C. The wheel is heated to 855°C with the furnace, and after 4 hours of heat preservation, it is cooled by spraying water with inclined nozzles for 400 seconds, and then kept at 500°C for 5 hours, and then air-cooled.

[0030] The mechanical properties of the rim are shown in Table 2. It can b...

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Abstract

The invention discloses wheel steel for a railway wagon. The wheel steel comprises the following chemical components in percentage by weight: 0.46-0.55% of C, 0.20-0.37% of Si, 0.70-0.85% of Mn, 0.24-0.32% of Cr, 0.020-0.040% of Als, less than or equal to 0.008% of P, less than or equal to 0.008% of S and the balance of Fe and inevitable impurity elements. The invention also discloses a method for preparing wheels by using high-carbon and low-alloy wheel steel for a railway wagon; and the method comprises a heat treatment process; and the heat treatment process comprises the following steps: holding the temperature at 860-880 DEG C for 3-3.5 hours, discharging the wheel steel out of a furnace and cooling the wheel steel with air to room temperature, then holding the temperature at 840-860 DEG C for 4 hours, spraying water to cool a wheel hub for 400 seconds, then holding the temperature at 480-500 DEG C for 5 hours, discharging the wheel out of the furnace and cooling the wheel with air.

Description

technical field [0001] The invention belongs to the field of manufacturing integral rolling wheels for railways, and in particular relates to a wheel steel for domestic high-power railway locomotives with a maximum running speed of less than or equal to 120 km / h, a single-axis traction power of not less than 1200 kW, an axle load of 25 tons or less, and a wheel preparation method . Background technique [0002] As an important national infrastructure, the main artery of the national economy and a popular means of transportation, railways shoulder great responsibilities and arduous tasks in building an innovative country and achieving sound and rapid economic and social development. According to my country's medium and long-term railway planning and the speed of modernization of railway technology and equipment, by 2012, the number of high-power locomotives put into operation has reached more than 7,900. According to estimates, from 2009 to 2012, the average annual demand fo...

Claims

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Application Information

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IPC IPC(8): C22C38/18C21D1/26C21D9/00
Inventor 孙曼丽陈刚江波赵海钟斌王世付程德利李翔
Owner MAGANG (GROUP) HOLDING CO LTD
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