A method for forming special-shaped stainless steel pipes with unequal walls and reduced diameters
A forming method and stainless steel pipe technology, which is applied in the field of stainless steel seamless steel pipe processing and manufacturing, can solve the problems of steel pipe safety reduction and failure to meet the use environment, and achieve the effect of high safety
Active Publication Date: 2016-05-11
SHANDONG YAO CHENG NEW MATERIALS TECH CO LTD
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Problems solved by technology
[0003] It is mainly formed by welding two steel pipes with a diameter of 19mm and one steel pipe with a diameter of 16mm plus two reducing pipe fittings of 19mm to 16mm. There are four weld joints in one steel pipe, and the appearance of butt welds makes the steel pipe safe. Reduction of performance, can not meet some high requirements of the use of the environment
Method used
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Embodiment
[0026] This embodiment uses a finished stainless steel pipe with an outer diameter of Φ19mm and a wall thickness of 2mm, rolled into a special-shaped stainless steel pipe with a length d of 4500mm, both ends d1 and d2 of 260mm, a constant wall thickness of 2mm, and a wall thickness of 1.5mm in the middle section.
[0027] 1) The process flow is as follows.
[0028] Cutting-surface cleaning-marking-inner wall lubrication-first cold rolling-inner wall lubrication-second cold rolling-inner wall lubrication-third cold rolling-degreasing-solution treatment -Straightening-cutting to length-inspecting packaging.
[0029] 2) Mainly used equipment
[0030] Multi-roll cold rolling mill, solution heat treatment furnace, pickling tank, steel pipe tension straightening machine, sawing machine.
[0031] 3) Process methods and conditions
[0032] ⑴、Unloading
[0033] The raw material is a finished stainless steel tube with an outer diameter of Φ19mm and a wall thickness of 2mm.
[0034] According to a s...
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Abstract
The invention relates to a method for machining a reducing unequal-wall-thickness special-shaped stainless steel pipe by utilizing a cold rolling method, which belongs to the field of the machining and manufacturing of a stainless steel seamless steel pipe. According to the technical scheme, the forming method comprises the following steps: (1) blanking; (2) cleaning the surface; (3) scribing; (4) lubricating the inner wall; (5) primarily cold rolling; (6) lubricating the inner wall; (7) secondarily cold rolling; (8) lubricating the inner wall; (9) thirdly cold rolling; (10) degreasing; (11) carrying out solid-solution treatment; (12) straightening; (13) fixing the size and sawing; and (14) inspecting and packaging. According to the production process, the process difficulties can be solved; moreover, the integrally rolled seamless steel pipe is high in safety, and the use under a severe environmental condition can be satisfied.
Description
Technical field [0001] The invention belongs to the processing and manufacturing field of stainless steel seamless steel pipes. Background technique [0002] Special-shaped stainless steel pipes with variable wall diameters are widely used in industry, but there is no mature seamless production process in steel pipe production; [0003] Two sections of steel pipes with a diameter of 19mm and a section of steel pipes with a diameter of 16mm plus two 19mm-16mm diameter reducing pipe fittings are mainly used for welding. One steel pipe has 4 weld joints and the appearance of butt welds makes the steel pipe safe. The performance is reduced and cannot meet some high-demand use environments. [0004] The integrally rolled seamless steel pipe has high safety and can be used in harsh environmental conditions. Summary of the invention [0005] For example, for two steel pipes with a diameter of 19mm and a steel pipe with a diameter of 16mm plus two 19mm-16mm diameter reducing pipe fittings w...
Claims
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IPC IPC(8): B21C37/06
CPCB21C37/156
Inventor 张丙静杨琦锋施恩贵宋建
Owner SHANDONG YAO CHENG NEW MATERIALS TECH CO LTD