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Method for seamless treatment of stainless steel welded pipe and application of method

A technology of stainless steel and welded pipe, applied in the field of stainless steel, can solve the problems of cumbersome and low efficiency, and achieve the effects of strong safety, broad application prospects and strong moisture resistance

Active Publication Date: 2021-05-28
上海久砾不锈钢管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By providing a seamless stainless steel welded pipe method and its application, the present invention solves the cumbersome and inefficient defect of the stainless steel welded pipe seamless method in the prior art, and realizes a highly practical stainless steel welded pipe seamless Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a method for making stainless steel welded pipes seamless, and the specific steps include:

[0067] S1. Purchase stainless steel coil raw materials, and longitudinally cut the coil raw materials into strips of specific specifications;

[0068] The model of the stainless steel coil raw material is 304, purchased from Wuxi Wanxinbao Metal Products Co., Ltd.;

[0069] The strip has a specification of 30mm×6m and a thickness of 3mm.

[0070] S2. Welding pipe: use the arc as the heat source, use the physical phenomenon of air discharge, convert the electric energy into the thermal energy and mechanical energy required for welding, weld the strips, and get the stainless steel welded pipe 1; set the arc starting voltage to 65v, and the combustion current to 300A .

[0071] S3. Use the NCSF8 leveler to straighten, straighten and repair the stainless steel welded pipe 1 to obtain the stainless steel welded pipe 2;

[0072] S4. Pipe blank outer circle ...

Embodiment 2

[0081] This embodiment provides a method for making stainless steel welded pipes seamless, and the specific steps include:

[0082] S1. Purchase stainless steel coil raw materials, and longitudinally cut the coil raw materials into strips of specific specifications;

[0083] The model of the stainless steel coil raw material is 316L, purchased from Wuxi Wanxinbao Metal Products Co., Ltd.;

[0084] The strip has a specification of 30mm×6m and a thickness of 3mm.

[0085] S2. Welding pipe: use the arc as the heat source, use the physical phenomenon of air discharge, convert the electric energy into the thermal energy and mechanical energy required for welding, weld the strips, and get the stainless steel welded pipe 1; set the arc starting voltage to 65v, and the combustion current to 300A .

[0086] S3. Use the NCSF8 leveler to straighten, straighten and repair the stainless steel welded pipe 1 to obtain the stainless steel welded pipe 2;

[0087] S4. Pipe blank outer circle...

Embodiment 3

[0096] This embodiment provides a method for making stainless steel welded pipes seamless, and the specific steps include:

[0097] S1. Purchase stainless steel coil raw materials, and longitudinally cut the coil raw materials into strips of specific specifications;

[0098] The model of the stainless steel coil raw material is 310S, purchased from Wuxi Wanxinbao Metal Products Co., Ltd.;

[0099] The strip has a specification of 30mm×6m and a thickness of 3mm.

[0100] S2. Welding pipe: use the arc as the heat source, use the physical phenomenon of air discharge, convert the electric energy into the thermal energy and mechanical energy required for welding, weld the strips, and get the stainless steel welded pipe 1; set the arc starting voltage to 65v, and the combustion current to 300A .

[0101] S3. Use the NCSF8 leveler to straighten, straighten and repair the stainless steel welded pipe 1 to obtain the stainless steel welded pipe 2;

[0102] S4. Pipe blank outer circle...

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Abstract

The invention relates to the field of stainless steel, in particular to a method for seamless treatment of a stainless steel welded pipe and application of the method. The method for seamless treatment of the stainless steel welded pipe is characterized by comprising the following specific steps: S1, selection, purchasing and slitting of a stainless steel coiled plate raw material; S2, welding and pipe manufacturing; S3, correction, straightening and end trimming; S4, polishing of the outer circle of a pipe blank; S5, cold rolling; S6, degreasing; S7, vacuum bright annealing; S8, secondary straightening and pipe cutting; S9, polishing of the inner circle of the pipe blank; and S10, packaging and warehousing. The method for seamless treatment of the stainless steel welded pipe has the following advantages that (1) the stainless steel welded pipe obtained based on the method is high in high temperature resistance and moisture resistance, not prone to generating orange patterns and attractive in appearance; (2) the stainless steel welded pipe obtained by the method is not easy to leak water and gas and is high in safety; and (3) the method is simple and practical, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of stainless steel, in particular to a method for making stainless steel welded pipes seamless and an application thereof. Background technique [0002] Stainless steel is an important part of special steel, and its output accounts for about 15-30% of special steel. Because stainless steel has good corrosion resistance, high temperature resistance, low temperature resistance, good mechanical properties and unique decoration, it is widely used in aerospace, energy, chemical industry, ocean development, transportation and other fields, and has become an indispensable part of industrial development. important metal materials. With the improvement of the national economy and people's living standards, stainless steel products occupy an increasingly important position in economic development. [0003] The seamless steel pipe is made by perforating the whole round steel, and the steel pipe without weld seam on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00Y02P10/20
Inventor 孔令琦
Owner 上海久砾不锈钢管有限公司