CN201420901Y - Stainless composite steel pipe - Google Patents
Stainless composite steel pipe Download PDFInfo
- Publication number
- CN201420901Y CN201420901Y CN2009200143423U CN200920014342U CN201420901Y CN 201420901 Y CN201420901 Y CN 201420901Y CN 2009200143423 U CN2009200143423 U CN 2009200143423U CN 200920014342 U CN200920014342 U CN 200920014342U CN 201420901 Y CN201420901 Y CN 201420901Y
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- steel pipe
- stainless steel
- steel tube
- carbon steel
- outer carbon
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Abstract
The utility model discloses a stainless composite steel pipe, which consists of an outer carbon steel pipe (1) and an inner stainless steel pipe (2) and is characterized in that the outer carbon steelpipe (1) is of a seamless steel pipe, and a brass diffusion brazing layer (3) with a thickness of 0.05 to 0.1mm is fully filled between the outer carbon steel pipe (1) and the inner stainless steel pipe (2). The brass diffusion brazing layer is fully filled in the gap between the stainless steel pipe and the carbon steel pipe and micron order diffusion occurs between the inner pipe and the outerpipe to form firm metallurgical bonding. The bonding strength reaches above 200MPa and the bonding rate reaches 100 percent. The price of the brass foil diffusion brazing layer is cheap and the melting point is low, the temperature of the diffusion brazing is low, the energy is saved and the cost is reduced.
Description
Technical field:
The utility model relates to a kind of industry and civilian composite bimetal pipe, and especially a kind of adhesive strength height,, outer surface good in conjunction with rate do not have weld seam, stainless steel composite pipe that cost is low.
Background technique:
The stainless steel composite pipe of coating stainless steel in the carbon steel tube, existing stainless excellent corrosion resistance, the high-strength characteristic that carbon steel is arranged again can replace Stainless Steel Tube to be used as the fluid-transporting tubing material in industry and multiple field such as civilian, has low price, saves advantage such as resource.Existing stainless steel composite pipe can be divided into two kinds of mechanical bond and metallurgy combination according to the internal and external layer bonding state.The stainless steel composite pipe of mechanical bond, in course of working such as bending, turn round, perhaps when temperature, pressure, load variations, phenomenons such as pipe unstability, bulge easily cause line clogging in can taking place.In addition, in use, aggressive medium also is easy to enter the interlayer gap and corrodes.Therefore, the application of the stainless steel composite pipe of mechanical bond is restricted.Existing metallurgy combination method has compound, the composite sheet welded tube of blast, soldering etc., plastic working such as that the stainless steel composite pipe compound, that the composite sheet welded tube is produced that wherein explodes can bear is curved, turn round, can under the condition of temperature, load, pressure oscillation, use, but make but relatively more difficult.The blast composite algorithm need be used explosive and special dies, not only time-consuming, effort, fabricating cost height, and be difficult to make elongated dimension tubing; Composite sheet welded tube method at first is with blast or hot rolling is compound etc., and method is produced Clad Steel Plate, needs complicated shaping and welding equipment and technology then, exists time-consuming, effort, problem that fabricating cost is high equally, also can't produce high-quality seamless steel pipe.Though the soldering composite algorithm also can realize the metallurgy combination between inner tube and the external pipe, used brazing layer is thickness coating scolder as thin as a wafer mostly, influences the adhesive strength of inner and outer pipes and in conjunction with rate.
Summary of the invention:
The utility model is in order to solve the above-mentioned technical problem that prior art exists, and provides a kind of adhesive strength height,, outer surface good in conjunction with rate not to have weld seam, stainless steel composite pipe that cost is low.
Technical solution of the present utility model is: a kind of stainless steel composite pipe, comprise outer carbon steel tube 1, inner layer stainless steel tube 2, described outer carbon steel tube 1 is a seamless steel pipe, and fully being filled with thickness between described outer carbon steel tube 1 and inner layer stainless steel tube 2 is the brass diffusion brazing layer 3 of 0.05～0.1mm.
The utility model has a layer thickness between outer carbon steel tube and inner layer stainless steel tube be the brass diffusion brazing layer of 0.05～0.1mm, gap between abundant filling stainless steel tube of this layer diffusion brazing layer and the carbon steel tube and and inner and outer pipe between the diffusion of micron number magnitude is arranged, form firm metallurgy combination, adhesive strength reaches more than the 200MPa, reaches 100% in conjunction with rate.Filtter gold diffusion brazing layer low price and fusing point are low, and the diffusion brazing temperature is low, can save the energy, reduce cost.Have the adhesive strength height,, outer surface good in conjunction with rate do not have weld seam, low cost and other advantages.
Description of drawings:
Fig. 1 is the utility model embodiment's a cross sectional representation.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: selecting the carbon steel seamless steel pipe for use is outer carbon steel tube 1; the thin-wall stainless steel welded tube is an inner layer stainless steel tube 2; external diameter of inner layer stainless steel tube 2 is slightly less than the internal diameter of outer carbon steel tube 1, the outer carbon steel tube 1 and can put into filtter gold between the two so that inner layer stainless steel tube 2 can be packed into easily.
Clean Stainless Steel Tube outer wall and carbon steel tube inwall with mechanical means, remove greasy dirt, the dust on filtter gold surface with washing agent.Filtter gold is wrapped in the outside of inner layer stainless steel tube 2 and inject in the outer carbon steel tube 1, inner layer stainless steel tube 2, filtter gold and outer carbon steel tube 1 are closely contacted, form composite pipe blank, composite pipe blank is carried out the termination welded seal by cold drawing.
Composite pipe blank is vertically hung, in the well formula of packing into the diffusion brazing stove, under shielding gas atmosphere, be heated to above the temperature of 30～50 ℃ of solder melting points, insulation 10～30min.Composite pipe after will heating again hangs out oven, cooling, the control rate of cooling is so that stainless steel is in the solution treatment state, carbon steel is in normalized condition, align, surface treatment, check, promptly obtain stainless steel composite pipe of the present utility model, comprise outer carbon steel tube 1, inner layer stainless steel tube 2, described outer carbon steel tube 1 is a seamless steel pipe, fully being filled with thickness between described outer carbon steel tube 1 and inner layer stainless steel tube 2 is the brass diffusion brazing layer 3 of 0.05～0.1mm, and described brass diffusion brazing layer 3 length equate with outer carbon steel tube 1 and inner layer stainless steel tube 2.
Claims (1)
1. stainless steel composite pipe, comprise outer carbon steel tube (1), inner layer stainless steel tube (2), described outer carbon steel tube (1) is a seamless steel pipe, it is characterized in that: fully being filled with thickness between described outer carbon steel tube (1) and inner layer stainless steel tube (2) is the brass diffusion brazing layer (3) of 0.05～0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200143423U CN201420901Y (en) | 2009-06-04 | 2009-06-04 | Stainless composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200143423U CN201420901Y (en) | 2009-06-04 | 2009-06-04 | Stainless composite steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201420901Y true CN201420901Y (en) | 2010-03-10 |
Family
ID=41807559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200143423U Expired - Fee Related CN201420901Y (en) | 2009-06-04 | 2009-06-04 | Stainless composite steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201420901Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889434A (en) * | 2012-10-24 | 2013-01-23 | 浙江金洲管道工业有限公司 | Stainless steel compound welding steel pipe and manufacturing method thereof |
| CN105004108A (en) * | 2015-08-17 | 2015-10-28 | 何珠华 | Piping for refrigeration, production method and application |
| CN108215345A (en) * | 2018-01-26 | 2018-06-29 | 卓然(靖江)设备制造有限公司 | A kind of nested three extruding metals pipe |
-
2009
- 2009-06-04 CN CN2009200143423U patent/CN201420901Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889434A (en) * | 2012-10-24 | 2013-01-23 | 浙江金洲管道工业有限公司 | Stainless steel compound welding steel pipe and manufacturing method thereof |
| CN102889434B (en) * | 2012-10-24 | 2015-01-21 | 浙江金洲管道工业有限公司 | Stainless steel compound welding steel pipe and manufacturing method thereof |
| CN105004108A (en) * | 2015-08-17 | 2015-10-28 | 何珠华 | Piping for refrigeration, production method and application |
| CN108215345A (en) * | 2018-01-26 | 2018-06-29 | 卓然(靖江)设备制造有限公司 | A kind of nested three extruding metals pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Method for manufacturing inner covered stainless steel compound steel pipe Effective date of registration: 20121213 Granted publication date: 20100310 Pledgee: Bank of Dalian Co fourth central sub branch Pledgor: Dalian Hesheng Technology Exploiture Co., Ltd. Registration number: 2012990000796 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20130906 Granted publication date: 20100310 Pledgee: Bank of Dalian Co fourth central sub branch Pledgor: Dalian Hesheng Technology Exploiture Co., Ltd. Registration number: 2012990000796 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Method for manufacturing inner covered stainless steel compound steel pipe Effective date of registration: 20131021 Granted publication date: 20100310 Pledgee: Bank of Dalian Co fourth central sub branch Pledgor: Dalian Hesheng Technology Exploiture Co., Ltd. Registration number: 2013990000763 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20150604 |
|
| EXPY | Termination of patent right or utility model |