CN107574292A - A kind of surface treatment method of cast iron seal - Google Patents
A kind of surface treatment method of cast iron seal Download PDFInfo
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- CN107574292A CN107574292A CN201710773436.8A CN201710773436A CN107574292A CN 107574292 A CN107574292 A CN 107574292A CN 201710773436 A CN201710773436 A CN 201710773436A CN 107574292 A CN107574292 A CN 107574292A
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Abstract
The invention mainly relates to sealing material field, discloses a kind of surface treatment method of cast iron seal, including：Clean, polish, rise again, quench, pack；Method is simple, and ultrasonic polishing is carried out to cleaning part, allantoin is added in carborundum suspension, quickly seal is polished comprehensively, roughness is down to 0.07 μm, avoids producing machinery the service life of abrasion, prolonged mechanical and seal；It is incubated after being slowly heated after polishing to seal; the nitrogen dioxide gas in heating furnace is promoted to penetrate into seal; protective layer is formed to seal; strengthen the corrosion resistance of seal; the grain size number of cast iron seal can be reduced; intensity, hardness and the toughness of seal are improved, avoids seal leakage；Seal is placed in ammonium nitrate solution after heating and quenched, diaphragm is formed in seal surface, improves the wearability and corrosion resistance of seal.
Description
Technical field
The invention mainly relates to sealing material field, more particularly to a kind of surface treatment method of cast iron seal.
Background technology
The seal used at present is mostly non-metallic seal, and wear resistance is poor, does not focus on maintenance somewhat and is easy for out
Existing leakage phenomenon, it can be used for the mechanical system stood, run at high speed, the mechanical system that seal is often worn out just needs hardness
Higher mechanical sealing member, cast iron seal are a kind of conventional metal seals, but current cast iron seal surface compared with
It is coarse, damage, and the easy corrosion after friction repeatedly and oil immersion of cast iron seal are easily caused to machinery, causes sealing
Decline.
The content of the invention
The defects of in order to make up prior art, it is an object of the invention to provide a kind of surface treatment side of cast iron seal
Method.
A kind of surface treatment method of cast iron seal, comprises the following steps：
（1）Cleaning：Cast iron seal after casting is placed in sodium carbonate liquor, 30 ~ 32kHz ultrasounds 25 ~ 30 minutes, must be cleaned
Part；
（2）Polishing：Cleaning part is placed in ultrasonic polishing machine, polishing suspension is carborundum suspension, in 31 ~ 33kHz polish 30 ~
35 minutes, clean, obtain polished part；
（3）Rise again：Polished part is placed in heating furnace, is passed through nitrogen dioxide gas, is heated to temperature as 800 ~ 900 DEG C, insulation
80 ~ 90 minutes, must rise again part；
（4）Quenching：Part of rising again is placed in the ammonium nitrate solution that mass concentration is 1.1 ~ 1.3% and quenched, 360 ~ 400 DEG C of guarantors
Temperature 30 ~ 40 minutes, is naturally cooling to room temperature, cast iron seal after must handling；
（5）Packaging：Oiling, packaging, obtains cast iron seal finished product.
The step（1）Carborundum suspension, also containing mass concentration be 2.2 ~ 2.4% allantoin.
The step（3）Nitrogen dioxide gas, volume fraction in heating furnace is 1.1 ~ 1.3%.
The step（3）Heating, heated up with 1.6 ~ 1.8 DEG C/min.
Cast iron seal finished product prepared by the surface treatment method of the cast iron seal.
It is an advantage of the invention that：The surface treatment method of cast iron seal provided by the invention, method is simple, after casting
Cast iron seal cleaning after remove surface impurity, be easy to later stage uniform treatment；Ultrasonic polishing, carborundum are carried out to cleaning part
Allantoin is added in suspension, quickly seal can comprehensively be polished, roughness is down to 0.07 μm, avoids producing machinery
The service life of raw abrasion, prolonged mechanical and seal；It is incubated after being slowly heated after polishing to seal, promotes heating furnace
Interior nitrogen dioxide gas penetrates into seal, forms protective layer to seal, strengthens the corrosion resistance of seal, can reduce casting
The grain size number of iron seal, the intensity, hardness and toughness of seal are improved, avoids seal leakage；By seal after heating
It is placed in ammonium nitrate solution and is quenched, forms diaphragm in seal surface, improve the wearability and corrosion resistance of seal.
Embodiment
Illustrate the present invention with specific embodiment below.
Embodiment 1
A kind of surface treatment method of cast iron seal, comprises the following steps：
（1）Cleaning：Cast iron seal after casting is placed in sodium carbonate liquor, 30kHz ultrasounds 25 minutes, obtains cleaning part；
（2）Polishing：Cleaning part is placed in ultrasonic polishing machine, polishing suspension is carborundum suspension, and 30 points are polished in 31kHz
Clock, clean, obtain polished part；Described carborundum suspension, also containing the allantoin that mass concentration is 2.2%；
（3）Rise again：Polished part is placed in heating furnace, is passed through nitrogen dioxide gas, the volume fraction in heating furnace is 1.1%,
Temperature is heated to as 800 DEG C using 1.6 DEG C/min, is incubated 80 minutes, must rise again part；
（4）Quenching：Part of rising again is placed in the ammonium nitrate solution that mass concentration is 1.1% and quenched, 360 DEG C are incubated 30 minutes,
Room temperature is naturally cooling to, cast iron seal after must handling；
（5）Packaging：Oiling, packaging, obtains cast iron seal finished product.
Cast iron seal finished product prepared by the surface treatment method of the cast iron seal.
Embodiment 2
A kind of surface treatment method of cast iron seal, comprises the following steps：
（1）Cleaning：Cast iron seal after casting is placed in sodium carbonate liquor, 31kHz ultrasounds 28 minutes, obtains cleaning part；
（2）Polishing：Cleaning part is placed in ultrasonic polishing machine, polishing suspension is carborundum suspension, and 33 points are polished in 32kHz
Clock, clean, obtain polished part；Described carborundum suspension, also containing the allantoin that mass concentration is 2.3%；
（3）Rise again：Polished part is placed in heating furnace, is passed through nitrogen dioxide gas, the volume fraction in heating furnace is 1.2%,
Temperature is heated to as 850 DEG C using 1.7 DEG C/min, is incubated 85 minutes, must rise again part；
（4）Quenching：Part of rising again is placed in the ammonium nitrate solution that mass concentration is 1.2% and quenched, 380 DEG C are incubated 35 minutes,
Room temperature is naturally cooling to, cast iron seal after must handling；
（5）Packaging：Oiling, packaging, obtains cast iron seal finished product.
Cast iron seal finished product prepared by the surface treatment method of the cast iron seal.
Embodiment 3
A kind of surface treatment method of cast iron seal, comprises the following steps：
（1）Cleaning：Cast iron seal after casting is placed in sodium carbonate liquor, 32kHz ultrasounds 30 minutes, obtains cleaning part；
（2）Polishing：Cleaning part is placed in ultrasonic polishing machine, polishing suspension is carborundum suspension, and 35 points are polished in 33kHz
Clock, clean, obtain polished part；Described carborundum suspension, also containing the allantoin that mass concentration is 2.4%；
（3）Rise again：Polished part is placed in heating furnace, is passed through nitrogen dioxide gas, the volume fraction in heating furnace is 1.3%,
Temperature is heated to as 900 DEG C using 1.8 DEG C/min, is incubated 90 minutes, must rise again part；
（4）Quenching：Part of rising again is placed in the ammonium nitrate solution that mass concentration is 1.3% and quenched, 400 DEG C are incubated 40 minutes,
Room temperature is naturally cooling to, cast iron seal after must handling；
（5）Packaging：Oiling, packaging, obtains cast iron seal finished product.
Cast iron seal finished product prepared by the surface treatment method of the cast iron seal.
Comparative example 1
Existing traditional cast iron seal finished product.
The performance of embodiment and comparative example cast iron seal：
Each 8 of the cast iron seal finished product of selection example and comparative example respectively, at normal temperatures and pressures, each group selects 2 respectively
The 6mol/L NaCl aqueous solution is placed in, selects 2 HCl/water solution for being placed in 6mol/L, selects 2 NaOH water for being placed in 6mol/L
In solution, there is the time corroded in observation each group cast iron seal finished product, and selects 2 to be used for Surface testing, results averaged,
Embodiment and the performance of comparative example cast iron seal are shown in Table 1.
Table 1：The performance of embodiment and comparative example cast iron seal
| Project | Roughness/(μm) | Acidproof/(d) | Alkaline-resisting/(d) | Salt tolerant/(d) | Wearability/（mm3） |
| Embodiment 1 | 0.08 | 294 | 318 | 304 | 23 |
| Embodiment 2 | 0.08 | 292 | 315 | 307 | 22 |
| Embodiment 3 | 0.07 | 293 | 317 | 305 | 20 |
| Comparative example 1 | 0.26 | 197 | 206 | 204 | 43 |
Show from the result of table 1, the cast iron seal finished product that the surface treatment method of the cast iron seal of embodiment obtains is coarse
Degree is substantially small compared with comparative example, and acidproof, alkaline-resisting and salt tolerance is substantially strong compared with comparative example, and the Volume Loss amount after friction substantially relatively contrasts
Example is small, and illustrating the surface treatment method of cast iron seal provided by the invention has good treatment effect.
Claims (5)
1. a kind of surface treatment method of cast iron seal, it is characterised in that comprise the following steps：
（1）Cleaning：Cast iron seal after casting is placed in sodium carbonate liquor, 30 ~ 32kHz ultrasounds 25 ~ 30 minutes, must be cleaned
Part；
（2）Polishing：Cleaning part is placed in ultrasonic polishing machine, polishing suspension is carborundum suspension, in 31 ~ 33kHz polish 30 ~
35 minutes, clean, obtain polished part；
（3）Rise again：Polished part is placed in heating furnace, is passed through nitrogen dioxide gas, is heated to temperature as 800 ~ 900 DEG C, insulation
80 ~ 90 minutes, must rise again part；
（4）Quenching：Part of rising again is placed in the ammonium nitrate solution that mass concentration is 1.1 ~ 1.3% and quenched, 360 ~ 400 DEG C of guarantors
Temperature 30 ~ 40 minutes, is naturally cooling to room temperature, cast iron seal after must handling；
（5）Packaging：Oiling, packaging, obtains cast iron seal finished product.
2. the surface treatment method of cast iron seal according to claim 1, it is characterised in that the step（1）Carbonization
Silicon suspension, also containing the allantoin that mass concentration is 2.2 ~ 2.4%.
3. the surface treatment method of cast iron seal according to claim 1, it is characterised in that the step（3）Dioxy
Change nitrogen, the volume fraction in heating furnace is 1.1 ~ 1.3%.
4. the surface treatment method of cast iron seal according to claim 1, it is characterised in that the step（3）Heating,
Heated up with 1.6 ~ 1.8 DEG C/min.
5. cast iron seal finished product prepared by a kind of surface treatment method of any one of claim 1 ~ 4 cast iron seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710773436.8A CN107574292A (en) | 2017-08-31 | 2017-08-31 | A kind of surface treatment method of cast iron seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710773436.8A CN107574292A (en) | 2017-08-31 | 2017-08-31 | A kind of surface treatment method of cast iron seal |
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| CN107574292A true CN107574292A (en) | 2018-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI784694B (en) * | 2021-08-31 | 2022-11-21 | 正修學校財團法人正修科技大學 | Method for metal treating |
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2017
- 2017-08-31 CN CN201710773436.8A patent/CN107574292A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI784694B (en) * | 2021-08-31 | 2022-11-21 | 正修學校財團法人正修科技大學 | Method for metal treating |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180112 |