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A kind of heavy-duty steel rail and its production method

A production method and rail technology, applied in the field of rails, can solve problems such as insufficient wear resistance of heavy-duty rails

Active Publication Date: 2017-08-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the wear resistance of the existing heavy-duty rail is not good enough, to provide a heavy-duty rail with better hardness and better wear resistance and its preparation method

Method used

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  • A kind of heavy-duty steel rail and its production method
  • A kind of heavy-duty steel rail and its production method
  • A kind of heavy-duty steel rail and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Converter smelting: 128 tons of pretreated molten iron (wherein the contents of S and As are shown in Table 1) are subjected to converter smelting, and anthracite is used as a carburant in the converter smelting process and the end point of the converter is controlled as follows: the C content is 0.18% by weight, the P content is 0.010% by weight, and the tapping temperature is 1650°C.

[0061] (2) Deoxidation alloying: alloying is carried out while the converter is tapping, and the composition after the alloying is controlled to be: C content is 0.75% by weight, Si content is 0.45% by weight, Mn content is 0.47% by weight, Cr content was 0.17% by weight and the V content was 0.035% by weight, and after alloying, a Ba-Ca-Si alloy was added to molten steel for deoxidation so that the oxygen content was 0.0018% by weight.

[0062] (3) Refining in LF furnace: Refining molten steel obtained from deoxidation alloying in LF furnace, and adding 180kg of LFP-III foaming age...

Embodiment 2

[0069] (1) Converter smelting: 124 tons of pretreated molten iron (wherein the contents of S and As are shown in Table 1) are subjected to converter smelting. During the converter smelting process, anthracite is used as a carburant and the end point of the converter is controlled as follows: the C content is 0.20% by weight, the P content is 0.012% by weight, and the tapping temperature is 1660°C.

[0070] (2) Deoxidation alloying: alloying is carried out while the converter is tapping, and the composition after the alloying is controlled to be: C content is 0.79% by weight, Si content is 0.50% by weight, Mn content is 0.49% by weight, Cr content 0.19% by weight and V content of 0.039% by weight, and after alloying, a Ba-Ca-Si alloy was added to molten steel for deoxidation so that the oxygen content was 0.0020% by weight.

[0071] (3) Refining in LF furnace: Refining molten steel obtained from deoxidation alloying in LF furnace, and adding 220kg LFP-III type foaming agent, 80...

Embodiment 3

[0078] (1) Converter smelting: 124 tons of pretreated molten iron (wherein the contents of S and As are shown in Table 1) are subjected to converter smelting. During the converter smelting process, anthracite is used as a carburant and the end point of the converter is controlled as follows: the C content is 0.15% by weight, the P content is 0.008% by weight, and the tapping temperature is 1610°C.

[0079] (2) Deoxidation alloying: alloying is carried out while tapping the converter, and the composition after the alloying is controlled to be: C content is 0.70% by weight, Si content is 0.40% by weight, Mn content is 0.45% by weight, Cr content 0.15% by weight and V content of 0.030% by weight, and after alloying, Ba-Ca-Si alloy was added to molten steel for deoxidation so that the oxygen content was 0.0018% by weight.

[0080] (3) Refining in LF furnace: Refining molten steel obtained from deoxidation alloying in LF furnace, and adding 150kg of LFP-III foaming agent, 700kg of ...

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Abstract

The invention relates to the field of steel rails, in particular to a heavy load steel rail and a producing method thereof. On the basis of the total weight, the heavy load steel rail is prepared from, by weight, 0.8-1.1% of C, 0.55-0.9% of Si, 0.5-1% of Mn, 0.2-0.75% of Cr, 0.04-0.12% of V, not larger than 0.01% of P and 96.12-97.91% of Fe. The heavy load steel rail has higher wear resistance.

Description

technical field [0001] The invention relates to the field of steel rails, in particular to a heavy-duty steel rail and a production method thereof. Background technique [0002] Railway transportation has the characteristics of stability, safety, low cost and high efficiency, and is the main artery of national economic development. my country is rich in natural resources and highly dependent on railway transportation. Since entering the 21st century, China's railway transportation has developed rapidly. At the end of 2009, the total mileage of railways in use across the country reached 86,000km, and China has become one of the countries with the longest operating railways in the world. It is estimated that the total mileage of railways in operation in China will reach 120,000km in 2020, including 16,000km of passenger-only railways. my country's railway freight is characterized by large axle load, dedicated transportation, and complex geographical environment. For example...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C21D9/04E01B5/02
Inventor 汪渊邹明郭华邓勇韩振宇宁雄显陈崇木袁俊武月春
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP