Hot rolling alloy steel for train brake disc

A technology of alloy steel and brake discs, applied in the field of hot-rolled alloys, can solve problems such as long-term service fatigue, local wear, and cracks, and achieve the effects of reducing subsequent processing, reducing production costs, and improving wear resistance

Inactive Publication Date: 2016-04-06
南京东电检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing hot-rolled alloy materials for train brake discs, casting defects often occur after the casting is completed, and repairs are usually used to remedy them. However, due to the differences between the repaired materials and the raw materials, the repaired parts will appear Micro...

Method used

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  • Hot rolling alloy steel for train brake disc
  • Hot rolling alloy steel for train brake disc
  • Hot rolling alloy steel for train brake disc

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Experimental program
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the embodiments and the drawings of the specification.

[0016] The material of the present invention adopts smelting + refining outside the vacuum furnace, and the compression ratio of the hot-rolled material is ≥3. By adjusting the distribution ratio of each component in the raw material, the obtained product composition is within the scope of the present invention. The following examples are obtained by specific testing.

[0017] The mass percentage content of each component is

[0018]

[0019] The rest is Fe element.

[0020] The products of the above-mentioned embodiments were inspected, and there were no visible shrinkage cavities, bubbles, cracks, inclusions, peeling, white spots, delamination, intergranular cracks, etc. on the acid immersion macrostructure test piece of the steel cross section. The test method of each batch of steel should be implemented in accordance with Table 1.

[0021] Table ...

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PUM

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Abstract

The invention discloses hot rolling alloy steel for a train brake disc. The hot rolling alloy steel comprises C, Si, Mn, Cr, N, Mo, V and Fe. C, Si, Mn, Cr, Ni, Mo and V are evenly doped and distributed in a steel base body according to the specific proportion, and the abrasion resistance of a material is greatly improved while the mechanical performance of the material is guaranteed. The material has good forming performance, the braking disc close to the final shape can be prepared, and later machining of a traditional preparing method is reduced. By means of control over the content range of C and Mn, the material cooling speed is increased, and the material strength and surface hardness are improved.

Description

Technical field [0001] The invention belongs to the field of metallurgy, and designs a hot-rolled alloy. Background technique [0002] When the train brake disc is working, it needs to withstand periodic alternating stress, high vibration, and corrosion from acid media. At the same time, it is under severe working conditions with intense friction. Therefore, the material selection should be appropriate, the material requirements should be high, the mechanical properties should meet the requirements, and the hardness should be high and uniform to ensure its reliable operation. [0003] In the existing hot-rolled alloy materials for train brake discs, casting defects often occur after the casting is completed, and repairing methods are usually used to remedy them. However, due to the differences between the repaired materials and the raw materials, the repaired parts will appear Microscopic cracks will break due to fatigue during long-term use. The train brake discs produced by the...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/04C22C38/08C22C38/12C22C38/16C22C38/14F16D65/12
CPCC22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18F16D65/125
Inventor 曾奇夫曾德文刘建广
Owner 南京东电检测科技有限公司
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