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What should be paid attention to when cutting stainless steel decorative tube

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Stainless steel decorative pipe is also called stainless steel welded steel pipe, referred to as short welded pipe, commonly used steel pipe or steel strip by the unit and mold after crimping welding. Welded steel pipe production process is simple, high production efficiency, more varieties and specifications, less equipment, but the overall strength is lower than seamless steel pipe.

FromSince the 1930 s, with the rapid development of continuous rolling production of high-quality strip steel and the development of welding and detection technology, the quality of welding has been continuously improved, the varieties and specifications of welded steel pipes have been increasing, and in more fields, especially in heat exchange equipment, people will use stainless steel decorative pipes for low-pressure fluid pipes and so on instead of seamless steel pipes. So do you know what problems need to be paid attention to when cutting stainless steel decorative tubes?


The cutting temperature of the stainless steel decorative tube is high: due to the high cutting ability, more heat will be generated, and as long as the medium carbon steel1/4, the thermal conductivity of stainless steel decorative tube is lower than that of stainless steel. The temperature in the cutting zone is therefore relatively high. When the cutting speed Vc<50 m/min, the cutting temperature is 200 ℃ ~ 250 ℃ higher than that of No. 45 steel. Therefore, tool wear is severe and durability is reduced.

Severe work hardening of stainless steel decorative tubes: During the cutting process of stainless steel decorative tubes, due to large plastic deformation, the austenite arrangement transforms into a fine-grained martensite arrangement, and severe hardening occurs. The hardness before processing is generallyHB200-220, the surface hardness after processing can reach HB450-550, the hardened layer depth is 0.1-0.3mm, and its hardening degree and depth are several times that of 45 steel. Severe work hardening will increase cutting forces, aggravate tool wear, and only cause tool chipping and damage.

The dimensional accuracy of the stainless steel decorative tube is not easy to control: the linear expansion coefficient of the stainless steel decorative tube is similar to that of brass. At high cutting temperature, some thermal deformation will occur, and the dimensional accuracy is not easy to control. When cutting stainless steel decorative pipes, rough machining should be performed first, and the workpiece should be cooled before finishing to ensure the dimensional accuracy of the workpiece.