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Manufacture method of stainless steel external wall panel for rail vehicle

A manufacturing method and technology for rail vehicles, which are applied in the field of stainless steel manufacturing, can solve many problems and complex manufacturing processes, and achieve the effects of facilitating control, reducing production difficulty and ensuring surface quality.

Active Publication Date: 2013-12-11
NINGBO BAOXIN STAINLESS STEEL
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AI Technical Summary

Problems solved by technology

BG80 products have very high requirements on mechanical properties, surface quality, grinding texture, and steel plate shape. In order to ensure surface quality and performance, the conventional manufacturing process of BG80 is complex and numerous. How to ensure stable and reliable production of this product through simple processes is currently a difficult problem to solve

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  • Manufacture method of stainless steel external wall panel for rail vehicle

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] see figure 1 , a method for manufacturing a stainless steel exterior wall panel for a rail vehicle, comprising the following steps:

[0024] 1) Black skin hot coil annealing and pickling (APH): In order to obtain the best performance, the raw material of the steel plate is heat-treated, and the annealing temperature is preferably 1050-1120°C. (HNO3+HF) production process is the same as conventional SUS304 stainless steel.

[0025] 2) Rough rolling with a multi-roll mill: In this embodiment, a 20-roll mill is preferably used, and the rough rolling reduction rate is 20-30%, so as to correct the shape of the steel coil and expose surface defects, and prepare for step 3).

[0026] 3) Coarse grinding: Eliminate surface defects caused by the above two steps, improve appearance quality, and create conditions for obtaining high-quality finish...

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Abstract

The invention discloses a manufacture method of a stainless steel external wall panel for rail vehicle. The method sequentially comprises the following steps: firstly, annealing and pickling of a black hot coil, secondly, rough rolling by using a multi-roll mill, thirdly, rough grinding, fourthly, finish rolling by using the multi-roll mill, fifthly, annealing and pickling of a cold coil, sixthly, leveling production, seventhly, finish grinding, and eighthly, cutting plates by a transverse cutting unit. The method has the advantages that the product performance and the surface quality are guaranteed through the reasonable arrangement and collocation of all production processes, the processes of rough rolling and rough grinding are adopted, so as to eliminate the surface defect of raw material and guarantee the surface quality of final products, specified yield strength, tensile strength and elongation are achieved through a leveling mode, and the grinding time of all racks is controlled during grinding, so that required surface requirements are achieved.

Description

technical field [0001] The invention relates to a method for manufacturing stainless steel, in particular to a method for manufacturing an exterior wall panel for rail vehicles. Background technique [0002] SUS301L stainless steel contains low C content and a certain amount of N. It not only has the characteristics of corrosion resistance and excellent welding performance, but also has high strength. It is a special stainless steel for rail vehicles. [0003] SUS301L has many varieties and specifications, and is currently the most difficult product for stainless steel cold-rolled production. In order to avoid light pollution, and at the same time facilitate maintenance and cleaning, as well as follow-up treatment such as paint-free, the external wall panels of stainless steel rail vehicles currently have relatively high requirements for the surface flatness of stainless steel. High, most of the BG80 products directly use SUS301L steel. BG80 products refer to the processing...

Claims

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Application Information

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IPC IPC(8): B21C37/02C21D8/02
Inventor 杜海宪洪流郑涛徐勇军邬军盛彭俊新肖文茂
Owner NINGBO BAOXIN STAINLESS STEEL
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