CN105834696A - Preparation method of stainless steel pipe for air conditioner - Google Patents
Preparation method of stainless steel pipe for air conditioner Download PDFInfo
- Publication number
- CN105834696A CN105834696A CN201610332764.XA CN201610332764A CN105834696A CN 105834696 A CN105834696 A CN 105834696A CN 201610332764 A CN201610332764 A CN 201610332764A CN 105834696 A CN105834696 A CN 105834696A
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- stainless steel
- steel tube
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- preparation
- stainless
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of preparation of stainless steel pipes, in particular to a preparation method of a stainless steel pipe for an air conditioner. The preparation method comprises of step I: steel strip surface pretreatment: spraying a pretreatment solution through multiple points on the surface of a stainless steel strip coil at the temperature of 85 to 90 DEG C through adopting a multi-point spraying method; step II: steel tube molding and welding: squeezing the stainless steel strip coil into a steel tube with linear weld joints, and carrying out smooth welding on the two sides of the weld joints through adopting positioned welding; step III: weld beam flattening; step IV: heat treatment: carrying out high temperature annealing treatment, firstly heating the stainless steel tube to 950 to 1000 DEG C, and then, heating the stainless steel tube to 1050 to 1200 DEG C; step V: steel tube surface pickling: quickly cooling the stainless steel tube subjected to heat treatment to 65 to 70 DEG C, and soaking and cleaning the stainless steel tube till the steel tube surface is bright through utilizing a pickling solution; step VI: steel tube surface water washing; and step VII: shaping, cutting, detection and storage. According to the stainless steel tube prepared through the method, the corrosion resistance is high, the quality of the inner and outer surfaces is good, and the manufacturing cost is relatively low.
Description
Technical field
The present invention relates to stainless steel tube preparing technical field, be specifically related to the preparation of a kind of stainless air conditioning pipe
Method.
Background technology
Split-type air conditioner has the indoor section being arranged on indoor and the outdoor section being arranged on open air, chamber interior
Divide and outdoor section is connected by refrigerant pipe.In prior art, refrigerant pipe is made of copper, and is incubated
Material covers in all sides of pipe, in case stop-pass crosses pipe generation thermal losses.Owing to refrigerant pipe is all made of copper,
Make that its weight is relatively big, cost is the highest, and for make the thermal losses of pipe minimize, the thickness of insulation material is relatively
Thickness, too increases installation cost.
Stainless steel tube has good combination property, compared with copper pipe, no matter on specific energy consumption or price
All there is the biggest advantage, become and increase quick tubulation industry at present.But adding of traditional welding stainless steel tube
In work method, stainless steel tube is easily generated corrosion and oxidation, especially weld seam, volume during preparation and use
Limit and pipe bent position surface are easily generated thicker densified oxidation scale, it is difficult to ensure that process qualified air-conditioning efficiently
With stainless steel tube, it is necessary to existing preparation technology is improved, to improve the resistance to of stainless steel tube surfaces externally and internally
Rotten ability, inner surface fineness etc..
Summary of the invention
The technical problem to be solved is to provide that a kind of corrosion resistant ability is strong, surfaces externally and internally quality is good and makes
Make the preparation method of lower-cost stainless air conditioning pipe.
For realizing above-mentioned technical purpose, the present invention uses following technical scheme:
The preparation method of stainless air conditioning pipe, comprises the steps:
Step one, steel strip surface pretreatment: use multiple spot spray process both side surface that stainless steel band is rolled up in 85～
Under the conditions of 90 DEG C multiple spot spray pretreatment fluid, cover to the pretreated liquid of steel strip surface comprehensively, the time of staying 1～
After 2min, quick recruitment ethics and practice is dried；Described pretreatment fluid is made up of the component of following mass concentration: hydrogen-oxygen
Change sodium 180-200g/l；Sodium carbonate 70-90g/l；Zinc nitrate hexahydrate 40-50g/l；Sodium tripolyphosphate
50-60g/l；Sodium silicate 30-50g/l；
Step 2, steel pipe forming weld: stainless steel band volume is squeezed into the tubulose with straight line soldered, adopts
With the smooth welding in tack welding butt welded seam both sides；
Step 3, welding bead are smooth: internally welding bead and outer welding bead enter respectively to utilize inner mould head and automatically grinding device
It is smooth that row is polishing to welding bead；
Step 4, heat treatment: welding bead stainless steel tube after smooth is carried out the high temperature anneal, is first to heat to
950-1000 DEG C, it is heated to 1050-1200 DEG C；
Step 5, steel tube surface pickling: the stainless steel tube after heat treatment is cooled fast to 65-70 DEG C, utilize
Pickle soaking and washing is to steel tube surface light；Described pickle is made up of the component of following mass concentration:
10-20g/l sulphuric acid；20-30g/l hydrochloric acid；5-10g/l Fluohydric acid.；
Step 6, steel tube surface are washed: cleaned by the stainless steel pipe surface after pickling processes dry by rinse water
Only；
Step 7, shaping, cut, detect, put in storage.
As preferably, in step one, described pretreatment fluid is made up of the component of following mass concentration: hydroxide
Sodium 185-190g/l；Sodium carbonate 80-85g/l；Zinc nitrate hexahydrate 45g/l；Sodium tripolyphosphate 55g/l；
Sodium silicate 40g/l.
As preferably, in step 2, welding current is 80-100A, and speed of welding is 5-6mm/min.
As preferably, in step 5, described pickle is made up of the component of following mass concentration: 15g/l sulphuric acid；
25g/l hydrochloric acid；8-10g/l Fluohydric acid..
As preferably, the chrome content of described stainless steel band volume is more than 12%, to improve its corrosion resistance further.
Owing to using technique scheme, the present invention has the following beneficial effect:
(1) by use multiple spot spray process, reasonable disposition pretreatment fluid to steel coil strip both side surface in 85～
Under the conditions of 90 DEG C, multiple spot spray processes, it is simple to by oxidiferous short texture in oxide skin in steel coil strip,
It is beneficial to the raising of subsequent handling welding fabrication quality；
(2) it is first to heat to 950-1000 DEG C during heat treatment, is heated to 1050-1200 DEG C, it is possible to effectively change
Kind its interior tissue form and mechanical property, improve product quality further；
(3) utilize described pickle that steel tube surface is processed, stainless steel pipe surface can be removed the most completely
Residual oxidization skin and corrosion product, and improve stainless steel pipe surface brightness；
(4) the idle call stainless steel tube prepared is compared with copper pipe, not only greatly reduces material cost, and
Effectively reduce thermal losses, there is good development prospect.
Accompanying drawing explanation
The following drawings is only intended to, in schematically illustrating the present invention and explaining, not delimit the scope of the invention.
Wherein:
Fig. 1 is the process chart of the embodiment of the present invention；
Fig. 2 is the effect schematic diagram of multiple spot spray process in the embodiment of the present invention.
In figure: 1-stainless steel band is rolled up；2-shower nozzle.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the present invention is expanded on further.In the following detailed description, the most logical
The mode crossing explanation describes some one exemplary embodiment of the present invention.Undoubtedly, the common skill of this area
Art personnel will be consequently realised that, in the case of without departing from the spirit and scope of the present invention, can use various difference
Mode described embodiment is modified.Therefore, accompanying drawing and description are the most illustrative,
Rather than be used for limiting scope of the claims.
Embodiment 1:
As it is shown in figure 1, the preparation method of a kind of stainless air conditioning pipe, comprise the steps:
Step one, steel strip surface pretreatment: select the stainless steel band volume 1 of width 30mm, thickness 1.55mm,
Its chrome content is more than 12%, with reference to Fig. 2, uses multiple equally distributed shower nozzle 2 two to stainless steel band volume 1
Side surface is multiple spot spray pretreatment fluid under the conditions of 85～90 DEG C, covers to the pretreated liquid of steel strip surface comprehensively,
After the time of staying about 1-2min, quick recruitment ethics and practice is dried；Described pretreatment fluid is by the group of following mass concentration
It is grouped into: sodium hydroxide 190g/l；Sodium carbonate 80g/l；Zinc nitrate hexahydrate 45g/l；Sodium tripolyphosphate
50g/l；Sodium silicate 40g/l；Solvent is water；By above-mentioned process, it is simple to will aoxidize on stainless steel band volume 1
Oxidiferous short texture in skin, the beneficially raising of subsequent handling welding fabrication quality；
Step 2, steel pipe forming weld: utilize " U " type or " W " mould to be squeezed into by stainless steel band volume
There is the tubulose of straight line soldered, use the smooth welding in tack welding butt welded seam both sides；Welding current is 80-100A,
Voltage is 10-12V, and speed of welding is 5mm/min, and in welding process, applying argon gas is protected；
Step 3, welding bead are smooth: internally welding bead and outer welding bead enter respectively to utilize inner mould head and automatically grinding device
It is smooth that row is polishing to welding bead；
Step 4, heat treatment: welding bead stainless steel tube after smooth is carried out the high temperature anneal, is first to heat to
950-1000 DEG C, it is heated to 1050-1200 DEG C, is beneficial to improve its interior tissue form and mechanical property, enters
One step improves product quality；
Step 5, steel tube surface pickling: the stainless steel tube after heat treatment is cooled fast to 65-70 DEG C or room temperature,
Utilize pickle soaking and washing to steel tube surface light；Described pickle is made up of the component of following mass concentration:
15g/l sulphuric acid；20g/l hydrochloric acid；8g/l Fluohydric acid.；
Step 6, steel tube surface are washed: cleaned by the stainless steel pipe surface after pickling processes dry by rinse water
Only；
Step 7, by the size according to the rules of the stainless steel tube after shaping cut, meet after testing ASME IX mark
Alignment request, face of weld quality is good, and corrosion resistant ability is strong.
Embodiment 2:
As it is shown in figure 1, the preparation method of a kind of stainless air conditioning pipe, comprise the steps:
Step one, steel strip surface pretreatment: selecting the stainless steel band volume of suitable dimension, with reference to Fig. 2, employing is many
Select the spray process both side surface to stainless steel band volume 1 multiple spot spray pretreatment fluid under the conditions of 85～90 DEG C, extremely
The pretreated liquid of steel strip surface covers comprehensively, and after time of staying 1min, quick recruitment ethics and practice is dried；Described pre-
Treatment fluid is made up of the component of following mass concentration: sodium hydroxide 180g/l；Sodium carbonate 85g/l；Six hydrations
Zinc nitrate 50g/l；Sodium tripolyphosphate 55g/l；Sodium silicate 45g/l；Solvent is water；By above-mentioned process,
It is easy to oxidiferous short texture in oxide skin in steel coil strip, beneficially subsequent handling welding fabrication matter
The raising of amount；
Step 2, steel pipe forming weld: utilize " U " mould to be squeezed into by stainless steel band volume and have straight line weldering
The tubulose of seam, uses the smooth welding in tack welding butt welded seam both sides；Welding current is 80-100A, and voltage is
10-12V, speed of welding is 5mm/min, and in welding process, applying argon gas is protected；
Step 3, welding bead are smooth: internally welding bead and outer welding bead enter respectively to utilize inner mould head and automatically grinding device
It is smooth that row is polishing to welding bead；
Step 4, heat treatment: welding bead stainless steel tube after smooth is carried out the high temperature anneal, is first to heat to
950-1000 DEG C, it is heated to 1050-1100 DEG C, is beneficial to improve its interior tissue form and mechanical property, enters
One step improves product quality；
Step 5, steel tube surface pickling: the stainless steel tube after heat treatment is quickly cooled down room temperature, utilizes pickling
Liquid soaking and washing is to steel tube surface light；Described pickle is made up of the component of following mass concentration: 10g/l sulfur
Acid；25g/l hydrochloric acid；5g/l Fluohydric acid.；
Step 6, steel tube surface are washed: cleaned by the stainless steel pipe surface after pickling processes dry by rinse water
Only；
Step 7, by the size according to the rules of the stainless steel tube after shaping cut, meet after testing ASME IX mark
Alignment request, packs, puts in storage.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.
Any those skilled in the art, done etc. on the premise of without departing from the design of the present invention and principle
With change and amendment, the scope of protection of the invention all should be belonged to.
Claims (5)
1. the preparation method of stainless air conditioning pipe, it is characterised in that comprise the steps:
Step one, steel strip surface pretreatment: use multiple spot spray process both side surface that stainless steel band is rolled up in 85～
Under the conditions of 90 DEG C multiple spot spray pretreatment fluid, cover to the pretreated liquid of steel strip surface comprehensively, the time of staying 1～
After 2min, quick recruitment ethics and practice is dried；Described pretreatment fluid is made up of the component of following mass concentration: hydrogen-oxygen
Change sodium 180-200g/l；Sodium carbonate 70-90g/l；Zinc nitrate hexahydrate 40-50g/l；Sodium tripolyphosphate
50-60g/l；Sodium silicate 30-50g/l；
Step 2, steel pipe forming weld: stainless steel band volume is squeezed into the tubulose with straight line soldered, adopts
With the smooth welding in tack welding butt welded seam both sides；
Step 3, welding bead are smooth: internally welding bead and outer welding bead enter respectively to utilize inner mould head and automatically grinding device
It is smooth that row is polishing to welding bead；
Step 4, heat treatment: welding bead stainless steel tube after smooth is carried out the high temperature anneal, is first to heat to
950-1000 DEG C, it is heated to 1050-1200 DEG C；
Step 5, steel tube surface pickling: the stainless steel tube after heat treatment is cooled fast to 65-70 DEG C, utilize
Pickle soaking and washing is to steel tube surface light；Described pickle is made up of the component of following mass concentration:
10-20g/l sulphuric acid；20-30g/l hydrochloric acid；5-10g/l Fluohydric acid.；
Step 6, steel tube surface are washed: cleaned by the stainless steel pipe surface after pickling processes dry by rinse water
Only；
Step 7, shaping, cut, detect, put in storage.
2. the preparation method of stainless air conditioning pipe as claimed in claim 1, it is characterised in that: step one
In, described pretreatment fluid is made up of the component of following mass concentration: sodium hydroxide 185-190g/l；Sodium carbonate
80-85g/l；Zinc nitrate hexahydrate 45g/l；Sodium tripolyphosphate 55g/l；Sodium silicate 40g/l.
3. the preparation method of stainless air conditioning pipe as claimed in claim 1, it is characterised in that: step 2
In, welding current is 80-100A, and speed of welding is 5-6mm/min.
4. the preparation method of stainless air conditioning pipe as claimed in claim 1, it is characterised in that: step 5
In, described pickle is made up of the component of following mass concentration: 15g/l sulphuric acid；25g/l hydrochloric acid；8-10g/l
Fluohydric acid..
5. the preparation method of stainless air conditioning pipe as claimed in claim 1, it is characterised in that: described not
The chrome content of rust steel coil strip is more than 12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332764.XA CN105834696A (en) | 2016-05-19 | 2016-05-19 | Preparation method of stainless steel pipe for air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332764.XA CN105834696A (en) | 2016-05-19 | 2016-05-19 | Preparation method of stainless steel pipe for air conditioner |
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| CN105834696A true CN105834696A (en) | 2016-08-10 |
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| CN201610332764.XA Pending CN105834696A (en) | 2016-05-19 | 2016-05-19 | Preparation method of stainless steel pipe for air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107127586A (en) * | 2017-06-06 | 2017-09-05 | 宁波百德满不锈钢有限公司 | A kind of stainless steel tube production method for being used to produce air-conditioning hush pipe |
| CN108247290A (en) * | 2017-12-21 | 2018-07-06 | 安徽中电气有限公司 | A kind of processing method of abrasion resistant thermocouple |
| CN112828538A (en) * | 2020-12-31 | 2021-05-25 | 无锡中雍智能制造有限公司 | Preparation method of hump tube |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692555A1 (en) * | 1994-07-11 | 1996-01-17 | Allegheny Ludlum Corporation | Annealing and descaling method for stainless steel |
| CN1205922A (en) * | 1997-07-21 | 1999-01-27 | 陈慧明 | Manufacture of stainless steel heat-transfer pipe for refrigerator |
| CN101092728A (en) * | 2007-04-11 | 2007-12-26 | 姜堰市德美化工有限公司 | Low-foam degreasing powder for cleaning surfaces of steel materials and preparation method thereof |
| CN101092727A (en) * | 2007-04-11 | 2007-12-26 | 姜堰市德美化工有限公司 | Chemical degreasing powder for ferrous metal surface treatment and preparation method thereof |
| CN102002722A (en) * | 2009-08-28 | 2011-04-06 | 比亚迪股份有限公司 | Stainless steel cleaner and stainless steel cleaning method |
| CN103866337A (en) * | 2014-03-10 | 2014-06-18 | 苏州捷德瑞精密机械有限公司 | Stainless steel detergent and preparation method thereof |
| CN104353973A (en) * | 2014-11-13 | 2015-02-18 | 江苏省常熟环通实业有限公司 | Preparation method of austenitic stainless steel pipe |
| CN104439949A (en) * | 2014-11-13 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Lengthened welded steel tube manufacturing method |
| CN204644477U (en) * | 2015-02-05 | 2015-09-16 | 宁波宝新不锈钢有限公司 | A kind of shower for cold-rolling stainless steel pickling line |
| CN105297045A (en) * | 2015-11-23 | 2016-02-03 | 佛山市高明俊品金属制品有限公司 | Surface washing method for stainless steel pipes |
-
2016
- 2016-05-19 CN CN201610332764.XA patent/CN105834696A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692555A1 (en) * | 1994-07-11 | 1996-01-17 | Allegheny Ludlum Corporation | Annealing and descaling method for stainless steel |
| CN1205922A (en) * | 1997-07-21 | 1999-01-27 | 陈慧明 | Manufacture of stainless steel heat-transfer pipe for refrigerator |
| CN101092728A (en) * | 2007-04-11 | 2007-12-26 | 姜堰市德美化工有限公司 | Low-foam degreasing powder for cleaning surfaces of steel materials and preparation method thereof |
| CN101092727A (en) * | 2007-04-11 | 2007-12-26 | 姜堰市德美化工有限公司 | Chemical degreasing powder for ferrous metal surface treatment and preparation method thereof |
| CN102002722A (en) * | 2009-08-28 | 2011-04-06 | 比亚迪股份有限公司 | Stainless steel cleaner and stainless steel cleaning method |
| CN103866337A (en) * | 2014-03-10 | 2014-06-18 | 苏州捷德瑞精密机械有限公司 | Stainless steel detergent and preparation method thereof |
| CN104353973A (en) * | 2014-11-13 | 2015-02-18 | 江苏省常熟环通实业有限公司 | Preparation method of austenitic stainless steel pipe |
| CN104439949A (en) * | 2014-11-13 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Lengthened welded steel tube manufacturing method |
| CN204644477U (en) * | 2015-02-05 | 2015-09-16 | 宁波宝新不锈钢有限公司 | A kind of shower for cold-rolling stainless steel pickling line |
| CN105297045A (en) * | 2015-11-23 | 2016-02-03 | 佛山市高明俊品金属制品有限公司 | Surface washing method for stainless steel pipes |
Non-Patent Citations (1)
| Title |
|---|
| 吴元徽: "《热处理工（初级）》", 28 February 2013, 北京：机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107127586A (en) * | 2017-06-06 | 2017-09-05 | 宁波百德满不锈钢有限公司 | A kind of stainless steel tube production method for being used to produce air-conditioning hush pipe |
| CN108247290A (en) * | 2017-12-21 | 2018-07-06 | 安徽中电气有限公司 | A kind of processing method of abrasion resistant thermocouple |
| CN112828538A (en) * | 2020-12-31 | 2021-05-25 | 无锡中雍智能制造有限公司 | Preparation method of hump tube |
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Application publication date: 20160810 |
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