CN101602056A - Degreasing method before a kind of stainless steel tube high-temperature process - Google Patents
Degreasing method before a kind of stainless steel tube high-temperature process Download PDFInfo
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- CN101602056A CN101602056A CNA2009101042299A CN200910104229A CN101602056A CN 101602056 A CN101602056 A CN 101602056A CN A2009101042299 A CNA2009101042299 A CN A2009101042299A CN 200910104229 A CN200910104229 A CN 200910104229A CN 101602056 A CN101602056 A CN 101602056A
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Abstract
The invention discloses the degreasing method before a kind of stainless steel tube high-temperature process, its characteristics are stainless steel tube to be adopted 200 ℃ to 400 ℃ low-temperature heat before high-temperature process, make the grease on the stainless steel tube decompose volatilization, thus the realization degreasing; Wherein as optimizing, described heating is to adopt stainless steel tube is put into electric furnace inside to heat, and be 1-2 hour heat time heating time.Than prior art, grease removal process of the present invention is not only time saving and energy saving, has reduced labour intensity, and has improved the validity and the efficient of steel tube surface grease removal, has guaranteed quality of stability after the steel pipe high-temperature process.
Description
Technical field
The present invention relates to a kind of stainless steel pipe surface processing method, the degreasing method before especially a kind of stainless steel pipe surface high-temperature process.
Background technology
Stainless steel tube produces bigger power when cold deformation and between the process equipment, and follow more heat to generate, must use the liquid fat that is fit to be lubricated and cool off,, also reduce the loss of process equipment simultaneously to improve the validity and the efficient of cold working operation.But stainless steel tube shows tangible work-hardening effect after carrying out cold working, because the bigger stress of inner existence, its intensity raises, plasticity decline.On the one hand, for ease of half-finished further cold deformation; On the other hand, reach the specification requirement of regulation,, must carry out high-temperature process cold working steel pipe later with the serviceability that obtains expection (comprise mechanical property and technology energy, and corrosion resistance etc.) in order to make final products.If before high-temperature process, do not remove or do not eliminate the grease that adheres to because of cold working on the steel pipe, in high-temperature heating process subsequently, steel pipe is infiltrated in grease generation carbonization, cause the steel tube surface chemical composition to change, carbon content raises, its anti intercrystalline corrosion performance descends, and finally causes tube quality defective.Therefore, the grease removal operation before the steel pipe high-temperature process is absolutely necessary.
The quality of anti intercrystalline corrosion performance is the main performance index of stainless steel tube, also is the main cause that influences stainless steel tube quality stability.As shown in the above, whether grease that stainless steel tube adheres on the tube wall before high-temperature process is removed clean, and the quality of the anti intercrystalline corrosion performance of final products is had a significant impact.
Soak when the method for removal grease is to use grease removal liquid that steel pipe is grown before traditional stainless steel tube high-temperature process, and repeated multiple times is cleaned, to clean the grease that inside and outside wall adheres to, with such method carry out grease removal not only complex operation, waste time and energy, the most important thing is still can not fully grease be eliminated through this technological operation, particularly for the grease removal of less specification steel pipe, seeming especially produces little effect.Because grease removal is unclean, in high-temperature heating process subsequently, steel pipe is infiltrated in the grease carbonization, causes the steel tube surface chemical composition to change, and carbon content raises, and its anti intercrystalline corrosion performance descends, and finally causes tube quality defective.
Summary of the invention
Technical problem to be solved by this invention is, a kind of degreasing method of removing before the effective stainless steel tube high-temperature process of grease is provided in order to overcome above-mentioned the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the present invention is:
Degreasing method before a kind of stainless steel tube high-temperature process, its characteristics are stainless steel tube to be adopted 200 ℃ to 400 ℃ low-temperature heat before high-temperature process, make the grease on the stainless steel tube decompose volatilization, thus the realization degreasing.
As optimization, described heating is to adopt stainless steel tube to be put into electric furnace inside to heat, and be 1-2 hour heat time heating time.
In this method, adopt 200 ℃ to 400 ℃ low-temperature heat, got heat time heating time 1-2 hour, this temperature range and time range are the numerical value that the applicant draws through a large amount of experiments, it belongs to the technical program and makes one of place of creative contribution for prior art, heating-up temperature is higher than 200 ℃, the grease that can make stainless steel tube adhere to can effectively be removed, heating-up temperature is lower than 400 ℃ simultaneously, it is too high and case-carbonizing takes place to make that steel tube surface is unlikely to Yin Wendu, cause the intergranular corrosion resistance performance of product seriously to descend, in conjunction with 1-2 hour heat time heating time, can make that the grease of steel tube surface is eliminated simultaneously.Like this, after eliminating grease, carburizing just can not take place in steel pipe when high-temperature process, and its chemical composition can not change, thereby has guaranteed the anti intercrystalline corrosion performance after the steel pipe high-temperature process.Wherein,, can be chosen under 300 ℃ of temperature and heat 1.5 hours, can make above-mentioned treatment effect the best as further optimization.
It is worthy of note, the inventive method is made the place of creative contribution to prior art, be to have changed degreasing method itself, change it among the application dry method degreasing by traditional wet degreasing, by can finding out in the technical solution of the present invention, the realization of technical solution of the present invention does not also rely on the kind of handled material, so, this method not only is applicable to the ungrease treatment of stainless steel tube, and it also is applicable to the ungrease treatment of other high temperature alloy pipes.
In sum, than prior art, grease removal process of the present invention is not only time saving and energy saving, has reduced labour intensity, and has improved the validity and the efficient of steel tube surface grease removal, has guaranteed quality of stability after the steel pipe high-temperature process.
The specific embodiment
Listing several concrete embodiments below is described in further detail the present invention.
Example 1: the degreasing method before a kind of stainless steel tube high-temperature process, employing are put into electric furnace inside with stainless steel tube and are heated before high-temperature process, 1 hour heat time heating time, heating-up temperature is 400 ℃, thereby make the grease on the stainless steel tube decompose volatilization, realize degreasing.
Example 2: the degreasing method before a kind of stainless steel tube high-temperature process, to adopt and heat putting into electric furnace inside before the stainless steel tube high-temperature process, 1.5 hours heat time heating times, heating-up temperature is 300 ℃, thereby makes the grease on the stainless steel tube decompose volatilization, realizes degreasing.
Example 3: the degreasing method before a kind of stainless steel tube high-temperature process, to adopt and heat putting into electric furnace inside before the stainless steel tube high-temperature process, 2 hours heat time heating times, heating-up temperature is 200 ℃, thereby makes the grease on the stainless steel tube decompose volatilization, realizes degreasing.
Example 4: the degreasing method before a kind of stainless steel tube high-temperature process, to adopt and heat putting into electric furnace inside before the stainless steel tube high-temperature process, 1.7 hours heat time heating times, heating-up temperature is 250 ℃, thereby makes the grease on the stainless steel tube decompose volatilization, realizes degreasing.
Example 5: the degreasing method before a kind of stainless steel tube high-temperature process, to adopt and heat putting into electric furnace inside before the stainless steel tube high-temperature process, 1.2 hours heat time heating times, heating-up temperature is 350 ℃, thereby makes the grease on the stainless steel tube decompose volatilization, realizes degreasing.
Claims (3)
1, the degreasing method before a kind of stainless steel tube high-temperature process is characterized in that stainless steel tube being adopted 200 ℃ to 400 ℃ low-temperature heat before high-temperature process, makes the grease on the stainless steel tube decompose volatilization, thus the realization degreasing.
2, the degreasing method before the stainless steel tube high-temperature process as claimed in claim 1 is characterized in that, described heating is to adopt stainless steel tube is put into electric furnace inside to heat, and be 1-2 hour heat time heating time.
3, the degreasing method before the stainless steel tube high-temperature process as claimed in claim 2 is characterized in that described heating-up temperature is 300 ℃, and be 1.5 hours heat time heating time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101042299A CN101602056B (en) | 2009-07-01 | 2009-07-01 | Degreasing method before high temperature treatment of stainless steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101042299A CN101602056B (en) | 2009-07-01 | 2009-07-01 | Degreasing method before high temperature treatment of stainless steel tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101602056A true CN101602056A (en) | 2009-12-16 |
| CN101602056B CN101602056B (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101042299A Expired - Fee Related CN101602056B (en) | 2009-07-01 | 2009-07-01 | Degreasing method before high temperature treatment of stainless steel tubes |
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| Country | Link |
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| CN (1) | CN101602056B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019283A (en) * | 2011-01-06 | 2011-04-20 | 重庆钢铁(集团)有限责任公司 | Degreasing method for preventing intercrystalline corrosion of aeronautic stainless pipe |
| CN102989826A (en) * | 2012-12-03 | 2013-03-27 | 江苏博隆环保设备有限公司 | On-line steel tube internal-external degreasing and cleaning complete-set equipment |
-
2009
- 2009-07-01 CN CN2009101042299A patent/CN101602056B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019283A (en) * | 2011-01-06 | 2011-04-20 | 重庆钢铁(集团)有限责任公司 | Degreasing method for preventing intercrystalline corrosion of aeronautic stainless pipe |
| CN102019283B (en) * | 2011-01-06 | 2012-04-18 | 重庆钢铁(集团)有限责任公司 | Degreasing method for preventing intercrystalline corrosion of aeronautic stainless pipe |
| CN102989826A (en) * | 2012-12-03 | 2013-03-27 | 江苏博隆环保设备有限公司 | On-line steel tube internal-external degreasing and cleaning complete-set equipment |
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| Publication number | Publication date |
|---|---|
| CN101602056B (en) | 2012-05-23 |
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Assignee: CHONGQING IRON & STEEL INSTITUTE CO., LTD. Assignor: Chongqing iron and steel Refco Group Ltd Contract record no.: 2012500000058 Denomination of invention: Degreasing method before high temperature treatment of stainless steel tubes Granted publication date: 20120523 License type: Exclusive License Open date: 20091216 Record date: 20120703 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20160701 |