CN105018702A - Technological method for stainless steel seamless steel tubes for heat exchangers - Google Patents
Technological method for stainless steel seamless steel tubes for heat exchangers Download PDFInfo
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- CN105018702A CN105018702A CN201510469402.0A CN201510469402A CN105018702A CN 105018702 A CN105018702 A CN 105018702A CN 201510469402 A CN201510469402 A CN 201510469402A CN 105018702 A CN105018702 A CN 105018702A
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Abstract
The invention discloses a technological method for stainless steel seamless steel tubes for heat exchangers. The technological method includes the steps of carrying out acid cleaning; polishing the surfaces; carrying out oiling; carrying out cold machining; carrying out cleaning with specially-made cleaning fluid; carrying out heat treatment; carrying out checking; carrying out tube cutting; carrying out acid cleaning for the second time; and carrying out inspection. The stainless steel seamless steel tubes, manufactured with the technological method, for the heat exchangers have the excellent mechanical properties and the excellent technological properties, are high in corrosion resisting capacity, meet national standards for the stainless steel seamless steel tubes for the heat exchangers and are long in service life; and in addition, according to the technological method, three different cold machining methods are provided according to different requirements, different requirements of consumers can be met, the marketing range is expanded, and economic benefits are increased.
Description
[technical field]
The present invention relates to weldless steel tube manufacturing technology field, particularly a kind of technical field of heat exchanger stainless-steel seamless pipe processing method.
[background technology]
Heat exchanger is used to make heat be delivered to cold fluid from hot-fluid, with the device of the processing requirement of satisfied regulation, transmission of heat by convection and heat conducting a kind of industrial application, stainless steel heat exchanger is application material is the heat exchanger of stainless material, there is extraordinary anti-oxidation characteristics, safety and sanitation, the field such as widespread use food, medicine, heating, domestic water, air-conditioning backwater, data according to heat-exchange equipment popularization center shows, stainless steel heat exchanger has better heat-transfer effect than the heat transfer effect of traditional simple steel heat exchanger, and the life-span uses longer.Stainless steel heat exchanger achieves in current many fields and applies comparatively widely, this heat exchanger adopts food grade stainless steel, have very outstanding antirust, the characteristic of good antiscale property, therefore stainless quality just represents the quality of stainless steel heat exchanger, therefore stainless production technique seems particularly important, the stainless steel art method of prior art cannot meet the demand of application, the stainless steel life-span of producing is short, change steel pipe frequently and then can increase production cost, therefore be necessary further to improve heat exchanger stainless-steel seamless pipe processing method.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, a kind of heat exchanger stainless-steel seamless pipe processing method is proposed, obtained stainless-steel seamless pipe has excellent mechanical property, processing performance, erosion resistance ability is strong, meet the standard of country for heat exchanger stainless-steel seamless pipe, and long service life.
For achieving the above object, the present invention proposes a kind of heat exchanger stainless-steel seamless pipe processing method, comprise pickling, thinning surface, oiling, cold working, the cleaning of special scavenging solution, thermal treatment, inspection, Pipe Cutting, second time pickling, inspection, concrete steps are as follows:
A () pickling: stainless-steel seamless pipe is immersed chemical reaction in acid solution, then uses pressure flush of water surfaces externally and internally;
(b) thinning surface: point-like reconditioning is carried out to the surface imperfection that stainless-steel seamless pipe after pickling exists;
C () oiling: be fixed on by stainless-steel seamless pipe on oiler, maintain static, uses the hairbrush rotated to surfaces externally and internally oiling, lubrication;
(d) cold working: stainless-steel seamless pipe is carried out as required cold rolling or cold-drawn or reaming, three kinds of Cold-forming process select one to carry out cold working;
E () special scavenging solution cleans: stainless-steel seamless pipe is placed in the container being full of special scavenging solution brewed for some time, then filters in clear water and then rinse with clear water;
(f) thermal treatment: stainless-steel seamless pipe is carried out solution heat treatment;
G () checks: adopt multiple roll straightener to correct linearity and the sinuousness of stainless-steel seamless pipe;
(h) Pipe Cutting: adopt metal saw blade to cut stainless-steel seamless pipe, dimensional precision, at 0 ~ ± 3mm, ensures that the termination of stainless-steel seamless pipe is rectangular, and removes termination burr;
(i) second time pickling: repeat primary acid cleaning process;
J () is checked: finally check stainless-steel seamless pipe, and the parameter of above each operation of upchecking implements the performance index of rear product, and feeds back.
As preferably, in described (a) step, the formula of acid solution is: HF content is 8%, HNO
3be 15%, H
2o is 77%, and the pressure of flushing is 1MPa.
As preferably, in described (d) step, if select cold rolling, carry out in 32# machine oil and paraffin mixed solution, if select cold-drawn; 3# industry fat and commercial lime mixing condition under carry out, if select reaming; 3# industry fat and commercial lime mixing condition under carry out.
As preferably, in described (e) step, special scavenging solution formula is HNO
3account for 15%, H
2o is 85%, and soaks half hour at the temperature of 50 DEG C ~ 60 DEG C.
As preferably, in described (f) step, solution heat treatment condition is at 1040 DEG C ~ 1150 DEG C temperature, is incubated 10 ~ 50 minutes, then uses quick spraying cooling.
Beneficial effect of the present invention: the heat exchanger stainless-steel seamless pipe that the present invention obtains has and excellent has excellent mechanical property, processing performance, erosion resistance ability is strong, meet the standard of country for heat exchanger stainless-steel seamless pipe, and long service life long service life, and the present invention proposes 3 kinds of different Cold-forming process for different demands, different consumer demands can be met, expand sale face, improve economic benefit.
Feature of the present invention and advantage will be described in detail by reference to the accompanying drawings by embodiment.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the heat exchanger stainless-steel seamless pipe that present invention process obtains;
Fig. 2 is the sectional view of the heat exchanger stainless-steel seamless pipe that present invention process obtains.
[embodiment]
For making the object, technical solutions and advantages of the present invention clearly understand, below by drawings and Examples, the present invention is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the present invention, is not limited to scope of the present invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
Consult Fig. 1 and Fig. 2, the present invention proposes a kind of heat exchanger stainless-steel seamless pipe processing method, comprise pickling, thinning surface, oiling, cold working, the cleaning of special scavenging solution, thermal treatment, inspection, Pipe Cutting, second time pickling, inspection, concrete steps are as follows:
A () pickling: stainless-steel seamless pipe is immersed chemical reaction in acid solution, then uses pressure flush of water surfaces externally and internally;
(b) thinning surface: point-like reconditioning is carried out to the surface imperfection that stainless-steel seamless pipe after pickling exists;
C () oiling: be fixed on by stainless-steel seamless pipe on oiler, maintain static, uses the hairbrush rotated to surfaces externally and internally oiling, lubrication;
(d) cold working: stainless-steel seamless pipe is carried out as required cold rolling or cold-drawn or reaming, three kinds of Cold-forming process select one to carry out cold working;
E () special scavenging solution cleans: stainless-steel seamless pipe is placed in the container being full of special scavenging solution brewed for some time, then filters in clear water and then rinse with clear water;
(f) thermal treatment: stainless-steel seamless pipe is carried out solution heat treatment;
G () checks: adopt multiple roll straightener to correct linearity and the sinuousness of stainless-steel seamless pipe;
(h) Pipe Cutting: adopt metal saw blade to cut stainless-steel seamless pipe, dimensional precision, at 0 ~ ± 3mm, ensures that the termination of stainless-steel seamless pipe is rectangular, and removes termination burr;
(i) second time pickling: repeat primary acid cleaning process;
J () is checked: finally check stainless-steel seamless pipe, and the parameter of above each operation of upchecking implements the performance index of rear product, and feeds back.
In described (a) step, the formula of acid solution is: HF content is 8%, HNO
3be 15%, H
2o is 77%, the pressure rinsed is 1MPa, in described (d) step, if select cold rolling, carry out in 32# machine oil and paraffin mixed solution, if select cold-drawn; 3# industry fat and commercial lime mixing condition under carry out, if select reaming; 3# industry fat and commercial lime mixing condition under carry out, in described (e) step, special scavenging solution formula is HNO
3account for 15%, H
2o is 85%, and soaks half hour at the temperature of 50 DEG C ~ 60 DEG C, and in described (f) step, quenching heat treatment condition is at 1040 DEG C ~ 1150 DEG C temperature, is incubated 10 ~ 50 minutes, then uses quick spraying cooling.
Working process of the present invention:
A kind of heat exchanger of the present invention with stainless-steel seamless pipe processing method in the course of the work, first pickling is carried out to stainless-steel seamless pipe 1, the impurity of steel pipe internal-surface 2 and outside surface 3 is all cleaned up, reconditioning internal surface 2 and outside surface 3 again, finally cut off steel pipe as required, all use modernization machinery as cold-rolling mill in production process, continuous heat-treating drier etc., this not only can enhance productivity, also constant product quality can be ensured, steel pipe can be made to obtain uniform surface quality with special scavenging solution cleaning steel pipe, improve work-ing life, and the present invention proposes 3 kinds of different Cold-forming process for different demands, different consumer demands can be met, the sale face of expanding, improve economic benefit.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.
Claims (5)
1. a heat exchanger stainless-steel seamless pipe processing method, is characterized in that, comprise pickling, thinning surface, oiling, cold working, the cleaning of special scavenging solution, thermal treatment, inspection, Pipe Cutting, second time pickling, inspection, concrete steps are as follows:
A () pickling: stainless-steel seamless pipe is immersed chemical reaction in acid solution, then uses pressure flush of water surfaces externally and internally;
(b) thinning surface: point-like reconditioning is carried out to the surface imperfection that stainless-steel seamless pipe after pickling exists;
C () oiling: be fixed on by stainless-steel seamless pipe on oiler, maintain static, uses the hairbrush rotated to surfaces externally and internally oiling, lubrication;
(d) cold working: stainless-steel seamless pipe is carried out as required cold rolling or cold-drawn or reaming, three kinds of Cold-forming process select one to carry out cold working;
E () special scavenging solution cleans: stainless-steel seamless pipe is placed in the container being full of special scavenging solution brewed for some time, then filters in clear water and then rinse with clear water;
(f) thermal treatment: stainless-steel seamless pipe is carried out solution heat treatment;
G () checks: adopt multiple roll straightener to correct linearity and the sinuousness of stainless-steel seamless pipe;
(h) Pipe Cutting: adopt metal saw blade to cut stainless-steel seamless pipe, dimensional precision, at 0 ~ ± 3mm, ensures that the termination of stainless-steel seamless pipe is rectangular, and removes termination burr;
(i) second time pickling: repeat primary acid cleaning process;
J () is checked: finally check stainless-steel seamless pipe, and the parameter of above each operation of upchecking implements the performance index of rear product, and feeds back.
2. a kind of heat exchanger stainless-steel seamless pipe processing method as claimed in claim 1, it is characterized in that: in described (a) step, the formula of acid solution is: HF content is 8%, HNO
3be 15%, H
2o is 77%, and the pressure of flushing is 1MPa.
3. a kind of heat exchanger stainless-steel seamless pipe processing method as claimed in claim 1, it is characterized in that: in described (d) step, if select cold rolling, carry out in 32# machine oil and paraffin mixed solution, if select cold-drawn; 3# industry fat and commercial lime mixing condition under carry out, if select reaming; 3# industry fat and commercial lime mixing condition under carry out.
4. a kind of heat exchanger stainless-steel seamless pipe processing method as claimed in claim 1, it is characterized in that: in described (e) step, special scavenging solution formula is HNO
3account for 15%, H
2o is 85%, and soaks half hour at the temperature of 50 DEG C ~ 60 DEG C.
5. a kind of heat exchanger stainless-steel seamless pipe processing method as claimed in claim 1, it is characterized in that: in described (f) step, solution heat treatment condition is at 1040 DEG C ~ 1150 DEG C temperature, is incubated 10 ~ 50 minutes, then uses quick spraying cooling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510469402.0A CN105018702A (en) | 2015-08-04 | 2015-08-04 | Technological method for stainless steel seamless steel tubes for heat exchangers |
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|---|---|---|---|
| CN201510469402.0A CN105018702A (en) | 2015-08-04 | 2015-08-04 | Technological method for stainless steel seamless steel tubes for heat exchangers |
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| CN201510469402.0A Pending CN105018702A (en) | 2015-08-04 | 2015-08-04 | Technological method for stainless steel seamless steel tubes for heat exchangers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523673A (en) * | 2017-04-21 | 2017-12-29 | 苏州贝思特金属制品有限公司 | A kind of stainless-steel seamless pipe coil pipe manufacture method of martensite 410 |
| CN109848244A (en) * | 2018-12-27 | 2019-06-07 | 四川艾格瑞特模具科技股份有限公司 | A kind of production method of stainless-steel seamless pipe |
| CN111112339A (en) * | 2019-12-31 | 2020-05-08 | 南京沃尔德特钢有限公司 | Method for manufacturing seamless stainless steel heat exchanger tube |
Citations (4)
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|---|---|---|---|---|
| CN101530869A (en) * | 2008-03-14 | 2009-09-16 | 钱乐中 | Process for manufacturing stainless-steel seamless steel pipe used for high-pressure boiler, boiler and heat-exchanger |
| CN101551040A (en) * | 2008-04-02 | 2009-10-07 | 上海凯斯特钢管制造有限公司 | Large-caliber stainless steel seamless pipe and processing method thereof |
| CN103436677A (en) * | 2013-08-23 | 2013-12-11 | 常州腾跃不锈钢管有限公司 | Production method of stainless steel tube specially used for double-tube plate heat exchanger |
| CN103695799A (en) * | 2013-12-26 | 2014-04-02 | 浙江德传管业有限公司 | Production process of heat-resistance stainless steel seamless steel pipes with ultra-fine grains |
-
2015
- 2015-08-04 CN CN201510469402.0A patent/CN105018702A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530869A (en) * | 2008-03-14 | 2009-09-16 | 钱乐中 | Process for manufacturing stainless-steel seamless steel pipe used for high-pressure boiler, boiler and heat-exchanger |
| CN101551040A (en) * | 2008-04-02 | 2009-10-07 | 上海凯斯特钢管制造有限公司 | Large-caliber stainless steel seamless pipe and processing method thereof |
| CN103436677A (en) * | 2013-08-23 | 2013-12-11 | 常州腾跃不锈钢管有限公司 | Production method of stainless steel tube specially used for double-tube plate heat exchanger |
| CN103695799A (en) * | 2013-12-26 | 2014-04-02 | 浙江德传管业有限公司 | Production process of heat-resistance stainless steel seamless steel pipes with ultra-fine grains |
Non-Patent Citations (3)
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|---|
| 云正宽等: "《冶金工程设计 第2册 工艺设计》", 30 June 2006 * |
| 刘宝权等: "《设备管理与维修》", 29 February 2012 * |
| 秦国治等: "《化学清洗实用技术》", 30 November 1996 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523673A (en) * | 2017-04-21 | 2017-12-29 | 苏州贝思特金属制品有限公司 | A kind of stainless-steel seamless pipe coil pipe manufacture method of martensite 410 |
| CN109848244A (en) * | 2018-12-27 | 2019-06-07 | 四川艾格瑞特模具科技股份有限公司 | A kind of production method of stainless-steel seamless pipe |
| CN111112339A (en) * | 2019-12-31 | 2020-05-08 | 南京沃尔德特钢有限公司 | Method for manufacturing seamless stainless steel heat exchanger tube |
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Application publication date: 20151104 |