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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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 convent

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

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

[0023] See figure 1 , A manufacturing method of stainless steel exterior wall panels for rail vehicles, including 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 ℃. The scale removal process, sulfuric acid pre-pickling, and mixed acid are adopted. (HNO3+HF) The production process is the same as conventional SUS304 stainless steel.

[0025] 2) Multi-roll mill rough rolling: 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) Rough grinding: Eliminate surface defects caused by the above two steps, improve appearance qualit...

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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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