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A kind of manufacturing method of ferritic stainless steel welded pipe

A manufacturing method and stainless steel technology, applied in conveyors, transportation and packaging, etc., can solve the problems of low maintenance cost, short service life, short maintenance cycle, etc., and achieve the effect of short service life, good corrosion resistance and high dimensional accuracy.

Active Publication Date: 2018-03-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For ferritic stainless steel high-frequency longitudinal seam welded pipes with good corrosion resistance, short life, low maintenance cost, short maintenance cycle and good comprehensive mechanical properties and their manufacture, there is currently no domestic manufacturer

Method used

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Examples

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Embodiment Construction

[0016] A method for manufacturing a ferritic stainless steel welded pipe, carried out according to the following steps

[0017] Step 1. Select a stainless steel strip with a thickness of 2mm, and its mass percentage ratio is: C: 0.015%, Si: 0.24%, Mn: 1.60%, P: 0.03%, S: 0.005%, Cr: 12.30%, Ni: 0.60%, Cu: 0.30%, N: 0.155%, Ti: 0.12%, O: 16ppm (ie 0.0016%), and the rest are Fe and unavoidable impurities.

[0018] Step 2: Uncoiling and leveling the steel strip. After the steel strip is uncoiled, mill the edge of the steel strip to ensure that the head edge of the steel strip is perpendicular to the side of the steel strip, and then level the steel strip to ensure that the steel strip is flat. A layer of carbon powder is sprayed on the surface to ensure the lubrication in the subsequent forming process, and it can reduce creases and reduce the damage to the surface during the forming process of the steel strip, and then adopt the row-roll forming method for forming. After a coil ...

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Abstract

The invention relates to the field of production of stainless steel welded tubes, in particular to a production method of a ferritic stainless steel welded tube. The method comprises the following steps: selecting a stainless steel strip with thickness of 2-3mm, wherein the stainless steel strip is prepared from the following components in mass percent: 0.01-0.03% of C, 0.20-1.00% of Si, 1.00-2.50% of Mn, less than or equal to 0.040% of P, less than or equal to 0.015% of S, 11.00-13.00% of Cr, 0.50-1.00% of Ni, 0.2-1.00% of Cu, 0.10-0.25% of N, 0.10-0.35% of Ti, less than or equal to 0.002% of O, and the balance of Fe and unavoidable impurities; and then uncoiling and flattening the steel strip, arranging rollers for forming, removing burrs inside and outside the welded tube, carrying out thermal treatment, and carrying out cold correction on the welded tube. The welded tube prepared by adopting the method disclosed by the invention is high in dimension precision, and can meet the requirements of tubes for carrier rollers used in long-distance, large-volume and high-speed belt conveyer conveying environments.

Description

technical field [0001] The invention relates to the field of manufacturing stainless steel welded pipes, in particular to a method for manufacturing ferritic stainless steel welded pipes. Background technique [0002] The idler roller for coal mine is one of the important parts of the belt conveyor. Therefore, the quality of idlers plays a great role in the stable production and operation of high-yield and high-efficiency mines, energy saving and emission reduction, and economic benefits. [0003] At present, the idler rollers used in coal mines are mainly made of carbon steel pipes. Under actual working conditions, there are disadvantages such as poor corrosion resistance, short life, and high surface resistance, resulting in high maintenance costs and poor operational stability of belt conveyors. With the development of belt conveyors in the direction of long-distance, large-capacity, and high-speed, the existing idlers made of carbon steel pipes have problems such as hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B65G15/60
Inventor 赵振铎王志斌李建民范光伟连杰李莎
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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