CN102225483A - Welding method of vertically brazed joint of stainless steel conduit - Google Patents

Welding method of vertically brazed joint of stainless steel conduit Download PDF

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Publication number
CN102225483A
CN102225483A CN2011101511373A CN201110151137A CN102225483A CN 102225483 A CN102225483 A CN 102225483A CN 2011101511373 A CN2011101511373 A CN 2011101511373A CN 201110151137 A CN201110151137 A CN 201110151137A CN 102225483 A CN102225483 A CN 102225483A
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CN
China
Prior art keywords
welding
nickel plating
sleeve pipe
stainless steel
gap
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Pending
Application number
CN2011101511373A
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Chinese (zh)
Inventor
佟庆暹
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Shenyang Aircraft Industry Group Co Ltd
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Shenyang Aircraft Industry Group Co Ltd
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Filing date
Publication date
Application filed by Shenyang Aircraft Industry Group Co Ltd filed Critical Shenyang Aircraft Industry Group Co Ltd
Priority to CN2011101511373A priority Critical patent/CN102225483A/en
Publication of CN102225483A publication Critical patent/CN102225483A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a welding method of a vertically brazed joint of a stainless steel conduit. The method comprises the following steps: 1) preparation of the surface of the joint before brazing; 2) preparation of a brazing filler metal ring; 3) preparation of a sleeve; 4) assembling of parts; and 5) welding. In the welding method of the vertically brazed joint of the stainless steel conduit mainly, a method of replenishing the brazing filler metal ring for welding over the joint before welding is adopted; and the method can be used for reducing the defects of the vertically brazed joint and improving the quality of products.

Description

The welding method of stainless steel pipe vertical direction soldered fitting
Technical field
The present invention relates to a kind of welding method of stainless steel pipe vertical direction soldered fitting, this method is used for the welding to the stainless steel pipe vertical direction.
Background technology
The conduit high-frequency induction brazing is divided into installing type and fixed two kinds.It is that workpiece is placed the induction heater that is full of argon gas that conduit is installed high-frequency induction brazing, adopts soft induction coil heating, carries high-frequency energy at a distance by coaxial cable, and adopts photosignal control brazing temperature, realizes the method for welding of closed-loop control.Conduit fixedly high-frequency induction brazing is that workpiece is placed the vacuum argon filling case, adopts the heating of single turn or multiturn induction coil, controls the method for welding of the relative position of hard induction coil and workpiece by hand.
This method has obtained widely applying in actual production, but still exists the weld zone on stainless steel pipe vertical direction soldered fitting top lack of penetration, also has defectives such as pore, solder knurl in addition, directly influences the quality of product.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of welding method of stainless steel pipe vertical direction soldered fitting, above joint, add the method for repair welding before the main employing weldering with the solder ring, this method has reduced the defective of vertical direction soldered fitting, has improved product quality.
For overcoming the above problems, concrete technical scheme of the present invention is as follows: a kind of welding method of stainless steel pipe vertical direction soldered fitting is characterized in that step is as follows:
1) preparation on soldering front connector surface: in the distance catheter end head is not less than the length of 50mm, carry out matt nickel plating, the nickel plating rear surface is even, lacklustre dark silvery white surface, nickel coating thickness is 6~9mm, and the external diameter tolerance is that d-0.05-0.1mm surface roughness is not less than Ra3.2mm;
2) preparation of solder ring: the thickness of solder ring is 0.25mm, and width is 1.5~3mm;
3) preparation of sleeve pipe: with the whole nickel plating of sleeve surface, the internal diameter after the sleeve pipe nickel plating is D+0.1+0.05mm, and all the other require identical with conduit;
4) assemble between part: sheathed catheter and is not more than 1.5mm with respect to the side-play amount of cover tube hub in sleeve pipe, when conduit diameter d≤10mm, the gap of two conduits is 4 + 1.0Mm solder ring is placed on the gap; When d 〉=12mm, the gap of two conduits is 0.2~2mm, and two solder rings are placed on the internal surface of sleeve pipe both sides respectively;
5) welding: before the welding, argon flow amount is 1.0L/min, and equipment power output: 50KW when guaranteeing welding, and welding temperature is 1060 ℃; Argon flow amount is 2.0~2.8 L/min during welding, 65 seconds holding times; Welding back argon flow amount is 2.0~2.8 L/min.
This method adopts the solder ring that stainless steel pipe vertical direction joint is carried out soldering, and the joint before the soldering handled, stipulated welding condition simultaneously, the flow of argon gas when guaranteeing welding, reduce the oxidation of part in welding process, thereby guaranteed welding quality.
Description of drawings
The placement location schematic diagram of solder ring when Fig. 1 is conduit diameter d≤10mm.
The placement location schematic diagram of solder ring when Fig. 2 is conduit diameter d 〉=12mm.
The specific embodiment
A kind of welding method of stainless steel pipe vertical direction soldered fitting is characterized in that step is as follows:
1) preparation on soldering front connector surface: in the distance catheter end head is not less than the length of 50mm, carry out matt nickel plating, the nickel plating rear surface is even, lacklustre dark silvery white surface, nickel coating thickness is 6~9mm, and the external diameter tolerance is that d-0.05-0.1mm surface roughness is not less than Ra3.2mm;
2) preparation of solder ring: the thickness of solder ring is 0.25mm, and width is 1.5~3mm;
3) preparation of sleeve pipe: with the whole nickel plating of sleeve surface, the internal diameter after the sleeve pipe nickel plating is D+0.1+0.05mm, and all the other require identical with conduit;
4) assemble between part: sheathed catheter and is not more than 1.5mm with respect to the side-play amount of cover tube hub in sleeve pipe, as shown in Figure 1, when conduit diameter d≤10mm, the gap of two conduits is 4 + 1.0Mm solder ring is placed on the gap; As shown in Figure 2, when d 〉=12mm, the gap of two conduits is 0.2~2mm, and two solder rings are placed on the internal surface of sleeve pipe both sides respectively;
5) welding: before the welding, argon flow amount is 1.0L/min, and equipment power output: 50KW when guaranteeing welding, and welding temperature is 1060 ℃; Argon flow amount is 2.0~2.8 L/min during welding, 65 seconds holding times; Welding back argon flow amount is 2.0~2.8 L/min.

Claims (1)

1. the welding method of a stainless steel pipe vertical direction soldered fitting is characterized in that step is as follows:
1) preparation on soldering front connector surface: in the distance catheter end head is not less than the length of 50mm, carry out matt nickel plating, the nickel plating rear surface is even, lacklustre dark silvery white surface, nickel coating thickness is 6~9mm, and the external diameter tolerance is that d-0.05-0.1mm surface roughness is not less than Ra3.2mm;
2) preparation of solder ring: the thickness of solder ring is 0.25mm, and width is 1.5~3mm;
3) preparation of sleeve pipe: with the whole nickel plating of sleeve surface, the internal diameter after the sleeve pipe nickel plating is D+0.1+0.05mm, and all the other require identical with conduit;
4) assemble between part: sheathed catheter and is not more than 1.5mm with respect to the side-play amount of cover tube hub in sleeve pipe, when conduit diameter d≤10mm, the gap of two conduits is 4 + 1.0Mm solder ring is placed on the gap; When d 〉=12mm, the gap of two conduits is 0.2~2mm, and two solder rings are placed on the internal surface of sleeve pipe both sides respectively;
5) welding: before the welding, argon flow amount is 1.0L/min, and equipment power output: 50KW when guaranteeing welding, and welding temperature is 1060 ℃; Argon flow amount is 2.0~2.8 L/min during welding, 65 seconds holding times; Welding back argon flow amount is 2.0~2.8 L/min.
CN2011101511373A 2011-06-08 2011-06-08 Welding method of vertically brazed joint of stainless steel conduit Pending CN102225483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101511373A CN102225483A (en) 2011-06-08 2011-06-08 Welding method of vertically brazed joint of stainless steel conduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011101511373A CN102225483A (en) 2011-06-08 2011-06-08 Welding method of vertically brazed joint of stainless steel conduit

Publications (1)

Publication Number Publication Date
CN102225483A true CN102225483A (en) 2011-10-26

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Application Number Title Priority Date Filing Date
CN2011101511373A Pending CN102225483A (en) 2011-06-08 2011-06-08 Welding method of vertically brazed joint of stainless steel conduit

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CN (1) CN102225483A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103418871A (en) * 2012-05-15 2013-12-04 佛吉亚排放控制技术德国有限公司 Method of brazing, in particular induction brazing, and assembly
CN104551288A (en) * 2014-12-30 2015-04-29 北京有色金属研究总院 Combination welding connection method for mandrels and end type parts of camshafts
CN105035630A (en) * 2014-04-23 2015-11-11 康蒂泰克传送带系统有限公司 Conveyor belt with zero stage splice
CN105081622A (en) * 2015-09-14 2015-11-25 沈阳飞机工业(集团)有限公司 Method for manufacturing and pre-installing brazing filler material ring
CN105127533A (en) * 2015-09-06 2015-12-09 西安航空动力股份有限公司 Connecting method for thin-wall slim tubes
CN106624240A (en) * 2016-12-20 2017-05-10 江门市森德制冷器材有限公司 Process for covering copper on surface of iron part
CN109986160A (en) * 2019-04-25 2019-07-09 中国科学院近代物理研究所 A kind of manufacturing method of High-purity Niobium pipe-stainless steel tube vacuum brazing
CN110052683A (en) * 2019-05-31 2019-07-26 中国原子能科学研究院 The welding method of niobium and niobium alloy and stainless steel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85109379A (en) * 1984-12-27 1987-09-23 西屋电气公司 Method with soldering sleeve pipe and this sleeve pipe of application of ceramic flux band
CN1243777A (en) * 1999-01-30 2000-02-09 深圳市宝安联华实业有限公司 High-frequency heating and pressurizing technology and equipment for soldering ring and planar parts made of different metals
CN2823752Y (en) * 2005-08-24 2006-10-04 深圳市宝安联华实业有限公司 Detachable jointing part for stainless steel pipeline

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85109379A (en) * 1984-12-27 1987-09-23 西屋电气公司 Method with soldering sleeve pipe and this sleeve pipe of application of ceramic flux band
CN1243777A (en) * 1999-01-30 2000-02-09 深圳市宝安联华实业有限公司 High-frequency heating and pressurizing technology and equipment for soldering ring and planar parts made of different metals
CN2823752Y (en) * 2005-08-24 2006-10-04 深圳市宝安联华实业有限公司 Detachable jointing part for stainless steel pipeline

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张学军: "《航空钎焊技术》", 30 June 2008, 航空工业出版社 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103418871A (en) * 2012-05-15 2013-12-04 佛吉亚排放控制技术德国有限公司 Method of brazing, in particular induction brazing, and assembly
US9534723B2 (en) 2012-05-15 2017-01-03 Faurecia Emissions Control Technologies, Germany Gmbh Method of brazing, in particular induction brazing, and assembly
CN103418871B (en) * 2012-05-15 2017-01-18 佛吉亚排放控制技术德国有限公司 Method of brazing, in particular induction brazing, and assembly
CN105035630A (en) * 2014-04-23 2015-11-11 康蒂泰克传送带系统有限公司 Conveyor belt with zero stage splice
CN105035630B (en) * 2014-04-23 2019-11-01 康蒂泰克传送带系统有限公司 Conveyer belt with zero level connector
CN104551288A (en) * 2014-12-30 2015-04-29 北京有色金属研究总院 Combination welding connection method for mandrels and end type parts of camshafts
CN105127533A (en) * 2015-09-06 2015-12-09 西安航空动力股份有限公司 Connecting method for thin-wall slim tubes
CN105081622A (en) * 2015-09-14 2015-11-25 沈阳飞机工业(集团)有限公司 Method for manufacturing and pre-installing brazing filler material ring
CN106624240A (en) * 2016-12-20 2017-05-10 江门市森德制冷器材有限公司 Process for covering copper on surface of iron part
CN109986160A (en) * 2019-04-25 2019-07-09 中国科学院近代物理研究所 A kind of manufacturing method of High-purity Niobium pipe-stainless steel tube vacuum brazing
CN110052683A (en) * 2019-05-31 2019-07-26 中国原子能科学研究院 The welding method of niobium and niobium alloy and stainless steel

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Application publication date: 20111026