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What are the disadvantages of hexagonal steel pipe production

Author: Wuxi Xindi Special Pipe Co., Ltd    Time: 2021 / 4 / 10 14:09:37    Source: http://iranstorylogue.com

   Hexagonal steel pipe In the whole process of production, manufacturing and processing, some defects often occur, which will immediately lead to the specification of cold drawn hexagonal tube in the aspect of characteristics, and even cause certain risk factors in the whole process of application Hexagonal steel pipe The manufacturer analyzes the factors that lead to defects in the whole process of manufacturing and processing.

   Hexagonal steel pipe The defects caused by production and manufacturing are: crack, internal fold, external fold, crushing, delamination, scab, concave, convex hull, etc. So In the production process of cold drawn outer hexagon and inner rectangular steel, this kind of defect problem must be reduced as far as possible.

The causes are as follows:

(1) due to the surface defects or internal defects of hexagonal steel pipe material.

(2) in the whole process of manufacturing hexagonal tube, such as the design scheme of main parameters of cold rolling process is wrong, the surface of die shell is uneven, the lubrication standard is not good, and the design scheme and adjustment of plate hole are not scientific.

(3) in the whole process of heating, cold rolling, heat treatment and straightening, if excessive internal stress is caused due to improper heating and temperature control, uneven deformation, unscientific heating and cooling rate or large straightening deformation variable, it is likely to cause surface crack of cold drawn outer hexagonal inner rectangular steel.

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