Special alloy steel and method for high-speed rail turnout integral sliding bedplate

A kind of alloy steel, special technology, applied in the field of new material preparation and application, can solve the problems such as difficult to grasp, complex processing technology, short service life, etc., to solve the problem of precision and welding deformation, less machining process, strong integrity Effect

Inactive Publication Date: 2012-05-16
张佳秋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are defects such as complex processing techn

Method used

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  • Special alloy steel and method for high-speed rail turnout integral sliding bedplate
  • Special alloy steel and method for high-speed rail turnout integral sliding bedplate
  • Special alloy steel and method for high-speed rail turnout integral sliding bedplate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example 1

[0049] Special alloy steel, consisting of the following chemical components (mass percentage, %): C 0.096; Si 0.624; Mn 0.611; P 0.026; S 0.007; Cr 13.05; Ni 1.87; Nb 0.21; W 0.093; B 0.00023; N 0.021, The balance is Fe.

[0050] Put the castings and test bars with the above chemical composition into the box-type electric furnace for heat treatment:

[0051] (1) Normalizing treatment: heating in the furnace at 1080 ℃ ± 10 ℃, keeping it for 2-3 hours, and then putting the test bar into the pit electric furnace for tempering heat treatment after air cooling;

[0052] (2) Tempering treatment: heating in a furnace at 580℃±10℃ for 4-5 hours, air cooling.

[0053] The mechanical properties are as follows;

[0054] Tensile strength: above 961Mpa

[0055] Yield strength: above 620Mpa

[0056] Elongation: 12.511.813 (for 3 test bars)

[0057] Hardness: 343HB

[0058] (3) Conclusion:

[0059] The performance is basically qualified, and the hardness is harder to process.

Example Embodiment

[0060] Example 2

[0061] Special alloy steel, composed of the following chemical composition (mass percentage, %):

[0062] C 0.081; Si 0.82; Mn 0.75; P 0.022; S 0.008; Cr 12.75; Ni 1.85; Nb 0.22; W 0.11; B 0.0004; N 0.02, the balance is Fe.

[0063] Put the castings and test bars with the above chemical composition into a box-type electric furnace for heat treatment:

[0064] (1) Normalizing treatment: heating in the furnace at 1080℃±10℃, keeping it for 2-3 hours, and then putting the test bar into the pit electric furnace for tempering heat treatment after air cooling;

[0065] (2) Tempering treatment: heating in the furnace at 620℃±10℃ for 4-5 hours, and air cooling. The mechanical properties are as follows;

[0066] Tensile strength: above 870Mpa

[0067] Yield strength: above 590Mpa

[0068] Elongation: 1313.213.9 (for 3 test bars)

[0069] Hardness: 283HB

[0070] (3) Conclusion:

[0071] The performance is qualified.

Example Embodiment

[0072] Example 3

[0073] Special alloy steel, consisting of the following chemical composition (mass percentage, %): C0.070; Si 0.86; Mn 0.91; P 0.018; S 0.006; Cr 12.75; Ni2.1; Nb 0.25; W 0.089; B 0.0003; N 0.03, the balance is Fe.

[0074] Put the casting test bar with the above chemical composition into the box-type electric furnace for heat treatment:

[0075] (1) Normalizing treatment: heating in the furnace (electric furnace) at 1080℃±10℃, holding for 2-3 hours, after air cooling, put the test bar into the well-type electric furnace for heat treatment;

[0076] (2) Quenching treatment: heat in a furnace at 650℃±10℃ for 4-5 hours, quench into oil and cool to room temperature.

[0077] (3) Tempering treatment: heating in the furnace at 280℃±10℃ for 4-5 hours, and air cooling.

[0078] The mechanical properties are as follows;

[0079] Tensile strength: above 840Mpa

[0080] Yield strength: above 560Mpa

[0081] Elongation: 14 14.2 13.1 (for 3 test bars)

[0082] Hardness: 276HB

[0083]...

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Abstract

The invention which relates to novel special alloy steel, and concretely relates to special alloy martensite stainless steel and a method for preparing a high-speed rail turnout integral sliding bedplate from the stainless steel belongs to the technical field of novel material preparations and applications thereof. The special alloy steel comprises the following chemical components, by weight, equal to or less than 0.10% of C, equal to or less than 1.5% of Si, equal to or less than 1.5% of Mn, equal to or less than 0.03% of P, equal to or less than 0.03% of S, 12.5-15.5% of Cr, 1-2% of Ni, a certain amount of Nb, 0.05-0.2% of W, 0.0003-0.0005% of B, 0.02-0.04% of N, and the balance Fe, wherein the amount of Nb is 3-5 times the amount of C. The method is carried out with integral casting one-time forming. According to the invention, defects of the processing technology complexity and the short service life caused by the adoption of easily abraded common carbon steel and the welding of three parts in the prior art are offset. The integral sliding bedplate of the invention, which successfully replaces split-welded sliding bedplates, has the characteristics of high strength, good abrasion resistance, corrosion resistance and no rust, no deformation, and short production period. So, the method which can satisfy essential conditions for the streamline production is very suitable for the large batch production.

Description

technical field [0001] The invention relates to a new type of special alloy steel, specifically a special alloy steel martensitic stainless steel and a method for using the material to prepare a high-speed railway turnout integral sliding bed platen, belonging to the technical field of new material preparation and application. Background technique [0002] The overall sliding bed platen of the high-speed railway turnout in the prior art adopts ordinary carbon steel, and a wear-resistant layer of silicon carbide material is welded on its surface, and the thickness is generally only about 0.15mm. But because the wear-resistant layer is too thin, the service time is greatly limited. The structure of the above-mentioned deck is welded by three components. Due to the welding of two materials, welding defects and cracks are prone to occur during welding, so all welding joints should be inspected. There are complex processing techniques, difficult to master, and short service lif...

Claims

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Application Information

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IPC IPC(8): C22C38/54B22C9/04C21D9/00E01B7/14
Inventor 蒲玉宾张淼张俊英张佳秋
Owner 张佳秋
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