CN113182789A - Production process of train heat exchanger - Google Patents
Production process of train heat exchanger Download PDFInfo
- Publication number
- CN113182789A CN113182789A CN202110507221.8A CN202110507221A CN113182789A CN 113182789 A CN113182789 A CN 113182789A CN 202110507221 A CN202110507221 A CN 202110507221A CN 113182789 A CN113182789 A CN 113182789A
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- Prior art keywords
- heat exchanger
- temperature
- production process
- plate
- steel substrate
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 238000005219 brazing Methods 0.000 claims abstract description 24
- 229910000679 solder Inorganic materials 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 18
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000013329 compounding Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000007688 edging Methods 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 14
- 238000002474 experimental method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920002313 fluoropolymer Polymers 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
Abstract
The invention discloses a production process of a train heat exchanger, which comprises the following steps: A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate; B. compounding a brazing solder layer on the surface of the dried steel substrate; C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification; D. stamping the heat exchanger plate to form a plate with a wavy surface; E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment; F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger; G. polishing and edging the semi-finished product of the heat exchanger; H. the production process adopted by the invention is simple to operate, can effectively improve the compression strength and the impact strength of the heat exchanger, is not easy to deform and damage, and has long service life.
Description
Technical Field
The invention relates to the technical field of heat exchanger production, in particular to a production process of a train heat exchanger.
Background
A heat exchanger (also called heat exchanger) is a device that transfers part of the heat of a hot fluid to a cold fluid. The heat exchanger plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical industry production, and is widely applied. For example, the polytetrafluoroethylene heat exchanger for low temperature of a power plant is a novel device for recovering waste heat of the power plant for reducing the temperature of exhaust smoke. The fluoroplastic heat exchanger can prevent acid corrosion and reduce the temperature of the flue gas to be within 100 ℃. The expansion-limited pressure-applying heating welding process for the polytetrafluoroethylene (F-4 for short) tube plate developed by Zhengzhou industrial university solves the key technology of connecting fluoroplastic tubes and tube plates. Subsequently, various types of heat exchangers made in China are put into practical production and application in sequence, and good effects are achieved.
The existing heat exchanger has the defects of low strength, easy deformation, short service life and the like due to insufficient control of the production process, so that the existing production process needs to be improved.
Disclosure of Invention
The invention aims to provide a production process of a train heat exchanger, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
Preferably, the brazing solder layer in the step B comprises the following components in percentage by weight: 10 to 25 percent of copper, 0.5 to 2 percent of titanium, 6 to 10 percent of silicon and the balance of silver.
Preferably, the thickness of the brazing solder layer is 2mm-3 mm.
Preferably, the high-temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 800-;
b. continuously heating the high-temperature furnace to 1200-1300 ℃, and keeping the temperature for 2-3 h;
c. then, slowly cooling the high-temperature furnace to 600-700 ℃, and keeping the temperature for 1-2 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
Preferably, the welding temperature of the step F is 600-800 ℃.
Preferably, in the step H, the heat exchanger is placed at 3-4MPa for pressure bearing experiment.
Compared with the prior art, the invention has the beneficial effects that: the production process adopted by the invention is simple to operate, can effectively improve the compressive strength and the impact strength of the heat exchanger, is not easy to deform and damage, and has long service life; the brazing solder layer adopted by the invention can obtain higher welding strength, the welding internal stress is small, and the strength of the heat exchanger plate is further improved; the adopted high-temperature heat treatment process can further improve the wear resistance, toughness and bending resistance of the heat exchanger.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the invention provides the following technical scheme: a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
In this embodiment, the brazing solder layer in step B comprises the following components in percentage by weight: 10% of copper, 0.5% of titanium, 6% of silicon and the balance of silver.
In this example, the thickness of the brazing solder layer was 2 mm.
In this embodiment, the high temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 800 ℃, and then keeping the temperature for 1 h;
b. continuously heating the high-temperature furnace to 1200 ℃, and keeping the temperature for 2 hours;
c. then slowly cooling the high-temperature furnace to 600 ℃, and keeping the temperature for 1 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
In this embodiment, the welding temperature in step F is 600 ℃.
In this example, in step H, the heat exchanger was placed at 3MPa for a pressure bearing experiment.
Example two:
a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
In this embodiment, the brazing solder layer in step B comprises the following components in percentage by weight: 25% of copper, 2% of titanium, 10% of silicon and the balance of silver.
In this example, the thickness of the brazing solder layer was 3 mm.
In this embodiment, the high temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 900 ℃, and then keeping the temperature for 2 hours;
b. continuously heating the high-temperature furnace to 1300 ℃, and keeping the temperature for 3 hours;
c. then slowly cooling the high-temperature furnace to 700 ℃, and keeping the temperature for 2 hours;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
In this example, the welding temperature in step F was 800 ℃.
In this example, in step H, the heat exchanger was placed at 4MPa to perform a pressure bearing experiment.
Example three:
a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
In this embodiment, the brazing solder layer in step B comprises the following components in percentage by weight: 14% of copper, 0.6% of titanium, 7% of silicon and the balance of silver.
In this example, the thickness of the brazing solder layer was 2 mm.
In this embodiment, the high temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 820 ℃, and then keeping the temperature for 1 h;
b. continuously heating the high-temperature furnace to 1210 ℃, and keeping the temperature for 2.1 h;
c. then slowly cooling the high-temperature furnace to 610 ℃, and keeping the temperature for 1.1 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
In this example, the soldering temperature in step F was 650 ℃.
In this example, in step H, the heat exchanger was placed under 3.2MPa to perform a pressure bearing experiment.
Example four:
a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
In this embodiment, the brazing solder layer in step B comprises the following components in percentage by weight: 22% of copper, 1.8% of titanium, 9% of silicon and the balance of silver.
In this example, the brazing filler metal layer was 2.8mm thick.
In this embodiment, the high temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 880 ℃, and then keeping the temperature for 1.9 h;
b. continuously heating the high-temperature furnace to 1280 ℃, and keeping the temperature for 2.8 hours;
c. then slowly cooling the high-temperature furnace to 690 ℃, and keeping the temperature for 1.9 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
In this embodiment, the soldering temperature in step F is 680 ℃.
In this example, in step H, the heat exchanger was placed at 4MPa to perform a pressure bearing experiment.
Example five:
a production process of a train heat exchanger comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
In this embodiment, the brazing solder layer in step B comprises the following components in percentage by weight: 18% of copper, 1.5% of titanium, 8% of silicon and the balance of silver.
In this example, the brazing filler metal layer was 2.5mm thick.
In this embodiment, the high temperature heat treatment method in step E is as follows:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 850 ℃, and then keeping the temperature for 1.5 h;
b. continuously heating the high-temperature furnace to 1250 ℃, and keeping the temperature for 2.5 hours;
c. then slowly cooling the high-temperature furnace to 650 ℃, and keeping the temperature for 1.5 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
In this example, the welding temperature in step F was 700 ℃.
In this example, in step H, the heat exchanger was placed at 4MPa to perform a pressure bearing experiment.
Experimental example:
the heat exchanger obtained by the embodiments of the invention is used for performance test, and the obtained data is as follows:
| compressive Strength (MPA) | Impact strength (MPA) | |
| Example one | 105 | 60 |
| Example two | 108 | 65 |
| EXAMPLE III | 110 | 65 |
| Example four | 115 | 63 |
| EXAMPLE five | 115 | 68 |
In conclusion, the production process adopted by the invention is simple to operate, can effectively improve the compressive strength and the impact strength of the heat exchanger, is not easy to deform and damage and has long service life; the brazing solder layer adopted by the invention can obtain higher welding strength, the welding internal stress is small, and the strength of the heat exchanger plate is further improved; the adopted high-temperature heat treatment process can further improve the wear resistance, toughness and bending resistance of the heat exchanger.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A production process of a train heat exchanger is characterized by comprising the following steps: the method comprises the following steps:
A. firstly, selecting a steel substrate, cleaning and drying the two sides of the steel substrate;
B. compounding a brazing solder layer on the surface of the dried steel substrate;
C. cutting the steel substrate into a plurality of heat exchanger plates according to the specification;
D. stamping the heat exchanger plate to form a plate with a wavy surface;
E. putting the punched plate into a high-temperature furnace for high-temperature heat treatment;
F. welding the plate subjected to high-temperature heat treatment in a high-temperature vacuum environment to obtain a semi-finished product of the heat exchanger;
G. polishing and edging the semi-finished product of the heat exchanger;
H. and then carrying out a pressure test experiment, and packaging and warehousing qualified products.
2. The production process of the train heat exchanger according to claim 1, wherein the production process comprises the following steps: the brazing solder layer in the step B comprises the following components in percentage by weight: 10 to 25 percent of copper, 0.5 to 2 percent of titanium, 6 to 10 percent of silicon and the balance of silver.
3. The train heat exchanger production process according to claim 2, characterized in that: the thickness of the brazing solder layer is 2mm-3 mm.
4. The train heat exchanger production process according to claim 2, characterized in that: the high-temperature heat treatment method in the step E comprises the following steps:
a. putting the heat exchanger plate into a high-temperature furnace, heating the high-temperature furnace to 800-;
b. continuously heating the high-temperature furnace to 1200-1300 ℃, and keeping the temperature for 2-3 h;
c. then, slowly cooling the high-temperature furnace to 600-700 ℃, and keeping the temperature for 1-2 h;
d. and finally, closing the high-temperature furnace, and taking out after naturally cooling to room temperature.
5. The production process of the train heat exchanger according to claim 1, wherein the production process comprises the following steps: the welding temperature of the step F is 600-800 ℃.
6. The production process of the train heat exchanger according to claim 1, wherein the production process comprises the following steps: and in the step H, the heat exchanger is placed under 3-4MPa to carry out a pressure bearing experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507221.8A CN113182789A (en) | 2021-05-10 | 2021-05-10 | Production process of train heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507221.8A CN113182789A (en) | 2021-05-10 | 2021-05-10 | Production process of train heat exchanger |
Publications (1)
| Publication Number | Publication Date |
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| CN113182789A true CN113182789A (en) | 2021-07-30 |
Family
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| CN202110507221.8A Pending CN113182789A (en) | 2021-05-10 | 2021-05-10 | Production process of train heat exchanger |
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| US20210025662A1 (en) * | 2019-07-26 | 2021-01-28 | Hamilton Sundstrand Corporation | Corrosion barriers for heat exchangers |
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2021
- 2021-05-10 CN CN202110507221.8A patent/CN113182789A/en active Pending
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|---|---|---|---|---|
| CN1981983A (en) * | 2005-12-16 | 2007-06-20 | 林内株式会社 | Manufacture method of a latent heat recovery type heat exchanger |
| US20120247527A1 (en) * | 2010-12-21 | 2012-10-04 | Alphabet Energy, Inc. | Electrode structures for arrays of nanostructures and methods thereof |
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Application publication date: 20210730 |