Method for manufacturing ventilated steel tube made of hull steel
A manufacturing method and marine steel technology, applied in the field of steel manufacturing, can solve the problems of specification restrictions, high cost of seamless steel pipes, difficulty in forming, etc., and achieve the effect of improving toughness and reducing high temperature residence time
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[0026] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.
[0027] The manufacturing method of the marine steel ventilation steel pipe of the present invention is used for manufacturing the KSTPG4 marine steel ventilation steel pipe. Such as figure 1 Shown, the manufacturing method of marine steel ventilation steel pipe of the present invention comprises the following steps:
[0028] Step 1: Slitting, vertically cutting a piece of marine steel plate;
[0029] Step 2: Edge milling, through a milling process on both sides of the steel plate;
[0030] Step 3: Pre-bending, pre-bending is mainly to eliminate the straight edge of the plate end, first bend the side of the steel plate out of a circular arc, and then use the standard upper die to bend to the circular arc requirements for many times, which not only meets the pre-bending requirements but ...
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