CN102392210A - On-line rust-proof method for twisted steel - Google Patents
On-line rust-proof method for twisted steel Download PDFInfo
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- CN102392210A CN102392210A CN2011103309916A CN201110330991A CN102392210A CN 102392210 A CN102392210 A CN 102392210A CN 2011103309916 A CN2011103309916 A CN 2011103309916A CN 201110330991 A CN201110330991 A CN 201110330991A CN 102392210 A CN102392210 A CN 102392210A
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- twisted steel
- rust
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- steel
- twisted
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses an on-line rust-proof method for twisted steel. The method comprises the following step: ejecting steam or mixture of steam and oxygen to the twisted steel subjected to waste heat processing so as to generate a protective layer on the surface of the twisted steel. According to the on-line rust-proof method for twisted steel, the twisted steel with good surface gloss can be obtained. In addition, the method can satisfy the continuous production requirement of the twisted steel, and the production cost can not be obviously increased.
Description
Technical field
The present invention relates to the steel corrosion-resistant field, more particularly, the present invention relates to a kind of online rust-proofing method of Twisted Steel.
Background technology
Adopt the Twisted Steel of Heat Treatment explained hereafter; Surface oxidisation is fast; Reinforcing bar is placed in the open and just tangible corrosion can be occurred in 3-5 days generally speaking, especially receives weather bigger with the influence of storage environment, under the bigger condition of atmospheric moisture; 1 day even several hrs just corrosion can occur, cause the reinforcing bar visual appearance to descend.The rebar surface state of extreme difference has a strong impact on the sale of product and user's use.Improvement measure to the waste heat treatment steel bar surface corrosion; Never have very good way; Although domestic a lot of to achievement in research report, can satisfy online application and the less of good result arranged, Deformed Steel Bars production line successful Application and can steady running still less.
The reason that waste heat treatment steel bar gets rusty easily is: can not generate the fine and close iron scale under the common hot-rolled state because production technique causes rolling the back steel surface, rebar matrix directly contacts with atmospheric environment and causes corrosion.Therefore to improve waste heat treatment steel bar resistant to tarnishing ability, will try every possible means to generate layer protective layer, cut off rebar matrix and directly contact with atmospheric at rebar surface.Common practices is at rebar surface rust prevention by applying liquid material liquid, and is therefore a lot of to the research of rust protection liquid, but because characteristics such as the Deformed Steel Bars rhythm of production is fast, speed height, this method is unfavorable for the on-line continuous application.
Summary of the invention
The problem that gets rusty easily for the Twisted Steel surface that overcomes in the prior art through Heat Treatment; The invention provides a kind of online rust-proofing method of Twisted Steel; Said rust-proofing method under the temperature more than 200 ℃ to the mixture of the Twisted Steel injection water steam after the Heat Treatment or water vapour and oxygen, thereby generate resist on the surface of Twisted Steel.
Preferably, under 300 ℃ to 650 ℃ temperature to the mixture of the Twisted Steel injection water steam after the Heat Treatment or water vapour and oxygen.
Preferably, make the time of the mixture reaction of Twisted Steel and water vapour or water vapour and oxygen after the Heat Treatment be not less than 2 minutes.
Online rust-proofing method according to Twisted Steel of the present invention can obtain the good Twisted Steel of surface luster, and this method can satisfy the requirement of Twisted Steel quantity-produced, and can obviously not increase production cost.
Description of drawings
Fig. 1 handles the situation of Twisted Steel and the figure that untreated situation compares according to the method for the invention with adopting.
Embodiment
Hereinafter, will describe in detail according to embodiments of the invention.
The defective that gets rusty easily to the Twisted Steel of Heat Treatment in the prior art; The invention provides a kind of online rust-proofing method of Twisted Steel; Particularly; The online rust-proofing method of Twisted Steel of the present invention generates resist through the surface of the Twisted Steel after Heat Treatment, stops rebar matrix to contact with air ambient, thereby reaches antirust purpose.
The principle that online rust-proofing method adopted of Twisted Steel of the present invention does, at high temperature, water smoke or steam and iron generation oxidation-reduction reaction, its reaction formula is following:
When temperature＞570 ℃,
Fe+H
2O＝FeO+H
2
3Fe+4H
2O＝Fe
3O
4+4H
2
When temperature＜570 ℃,
3Fe+4H
2O＝Fe
3O
4+4H
2
3FeO+1/2O
2＝Fe
3O
4
2Fe
3O
4+1/2O
2＝3Fe
2O
3
The temperature that Twisted Steel after the Heat Treatment arrives cold bed is generally about 600 ℃, therefore when Twisted Steel just reaches cold bed, and the reaction conditions of satisfied temperature＞570 ℃, reaction generation FeO and Fe
3O
4Along with the temperature decline of Twisted Steel, when temperature dropped to below 570 ℃, FeO reacted once more and generates Fe
3O
4Therefore,, on the cold bed that steel rolling is produced, utilize steam oxidation to promote the surface of Twisted Steel to form zone of oxidation, reduce the exposed of Twisted Steel iron-based body, make the surperficial oxide debris that generates of Twisted Steel with Fe based on above reaction principle
3O
4And Fe
2O
3Be main, reduce the generation of readily oxidizable substance FeO, make the material that is prone to oxidation corrosion in the air that sex change at high temperature take place and generate stable oxide, prevent the purpose of getting rusty thereby reach.
Online rust-proofing method according to Twisted Steel of the present invention increases spraying plant on cold bed, at Twisted Steel water spray, water vapour or water vapour and the mixture of oxygen of high temperature after for example the temperature more than 200 ℃ adopts spraying plant to Heat Treatment.Preferably, Twisted Steel water spray, water vapour or the water vapour after 300 ℃ to 650 ℃ temperature is to Heat Treatment and the mixture of oxygen.
Prevent the purpose that Twisted Steel gets rusty in order fully to realize, preferably, the time of Twisted Steel after the Heat Treatment and water smoke reaction is not less than 2 minutes.
Below with reference to specific embodiment the online rust-proofing method according to spiral of the present invention is described.
Embodiment 1
Be that Twisted Steel after the Heat Treatment of 32mm is an example with the diameter, the reinforcing bar after rolling gets into walking beam cooler with the speed of 7.2m/s, and the temperature of last cold bed is 620 ℃; Begin spraying behind the last cold bed; The spraying while walking, spray time is 2 minutes, after this naturally cooling.Reinforcing bar sampling after the processing is carried out the contrast of stainless property with the reinforcing bar of not handling; Sample is placed in the open, and every day, the rainwater spray was 2 times, and untreated reinforcing bar began to get rusty in 1 day; Reinforcing bar after the processing begins to occur rust spot after 9 days, the resistant to tarnishing ability obviously improves.
Embodiment 2
Be that Twisted Steel after the Heat Treatment of 28mm is an example with the diameter, the reinforcing bar after rolling gets into walking beam cooler with the speed of 9.3m/s, and the temperature of last cold bed is 580 ℃; Begin spraying behind the last cold bed; The spraying while walking, spray time is 3.5 minutes, after this naturally cooling.Reinforcing bar sampling after the processing is carried out the contrast of stainless property with the reinforcing bar of not handling; Sample is placed in the open, and every day, the rainwater spray was 2 times, and untreated reinforcing bar began to get rusty in 1 day; Reinforcing bar after the processing begins to occur rust spot after 10 days, the resistant to tarnishing ability obviously improves.
Embodiment 3
Be that Twisted Steel after the Heat Treatment of 40mm is an example with the diameter, the reinforcing bar after rolling gets into walking beam cooler with the speed of 3.5m/s, and the temperature of last cold bed is 650 ℃; Begin spraying behind the last cold bed; The spraying while walking, spray time is 3 minutes, after this naturally cooling.Reinforcing bar sampling after the processing is carried out the contrast of stainless property with the reinforcing bar of not handling; Sample is placed in the open, and every day, the rainwater spray was 2 times, and untreated reinforcing bar began to get rusty in 1 day; Reinforcing bar after the processing begins to occur rust spot after 7 days, the resistant to tarnishing ability obviously improves.
Shown in the label 1 among Fig. 1 is untreated Twisted Steel, and the Twisted Steel after the method for embodiments of the invention 1 is handled is adopted in label 2 expressions among Fig. 1.As can be seen from Figure 1, good through the Twisted Steel surface luster after the rust-proofing method processing of the present invention, the phenomenon of significantly not getting rusty.
Online rust-proofing method according to Twisted Steel of the present invention can satisfy the requirement of Twisted Steel quantity-produced, to not influence of rhythm of production.In addition, the water vapour that adopts in the antirust process is the sub product of iron and steel enterprise, and is therefore little to the production cost influence.
The invention is not restricted to above disclosed embodiment, without departing from the present invention, can carry out various distortion and modification.
Claims (3)
1. the online rust-proofing method of a Twisted Steel is characterized in that said rust-proofing method mixture to the Twisted Steel injection water steam after the Heat Treatment or water vapour and oxygen under the temperature more than 200 ℃, thereby generates resist on the surface of Twisted Steel.
2. the online rust-proofing method of Twisted Steel according to claim 1 is characterized in that under 300 ℃ to 650 ℃ temperature the mixture to the Twisted Steel injection water steam after the Heat Treatment or water vapour and oxygen.
3. the online rust-proofing method of Twisted Steel according to claim 1 is characterized in that making the time of the mixture reaction of Twisted Steel and water vapour or water vapour and oxygen after the Heat Treatment to be not less than 2 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103309916A CN102392210A (en) | 2011-10-27 | 2011-10-27 | On-line rust-proof method for twisted steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103309916A CN102392210A (en) | 2011-10-27 | 2011-10-27 | On-line rust-proof method for twisted steel |
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| CN102392210A true CN102392210A (en) | 2012-03-28 |
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| CN2011103309916A Pending CN102392210A (en) | 2011-10-27 | 2011-10-27 | On-line rust-proof method for twisted steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925850A (en) * | 2012-10-29 | 2013-02-13 | 莱芜钢铁集团有限公司 | Twisted bar surface rust prevention method |
| CN102941229A (en) * | 2012-11-14 | 2013-02-27 | 莱芜钢铁集团有限公司 | Straightening plate and straightening method used for steel production |
| CN104668297A (en) * | 2015-01-21 | 2015-06-03 | 西安建筑科技大学 | Forming process of rebar surface oxide layer |
| CN105132855A (en) * | 2015-09-29 | 2015-12-09 | 武汉赛恩冶金技术开发有限公司 | Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process |
| CN113026012A (en) * | 2021-02-24 | 2021-06-25 | 广西柳钢华创科技研发有限公司 | Method for improving anti-rusting capability of bar end by using spray |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104931A (en) * | 2007-07-31 | 2008-01-16 | 莱芜钢铁集团有限公司 | Rust-proofing method for steel bar |
| CN101574768A (en) * | 2009-05-25 | 2009-11-11 | 丁邦顺 | Automobile water pump hub preparation method |
| JP2010007147A (en) * | 2008-06-27 | 2010-01-14 | National Institute Of Advanced Industrial & Technology | Magnesium alloy material, and surface treatment method for magnesium alloy |
-
2011
- 2011-10-27 CN CN2011103309916A patent/CN102392210A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104931A (en) * | 2007-07-31 | 2008-01-16 | 莱芜钢铁集团有限公司 | Rust-proofing method for steel bar |
| JP2010007147A (en) * | 2008-06-27 | 2010-01-14 | National Institute Of Advanced Industrial & Technology | Magnesium alloy material, and surface treatment method for magnesium alloy |
| CN101574768A (en) * | 2009-05-25 | 2009-11-11 | 丁邦顺 | Automobile water pump hub preparation method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925850A (en) * | 2012-10-29 | 2013-02-13 | 莱芜钢铁集团有限公司 | Twisted bar surface rust prevention method |
| CN102941229A (en) * | 2012-11-14 | 2013-02-27 | 莱芜钢铁集团有限公司 | Straightening plate and straightening method used for steel production |
| CN102941229B (en) * | 2012-11-14 | 2014-07-02 | 莱芜钢铁集团有限公司 | Straightening plate and straightening method used for steel production |
| CN104668297A (en) * | 2015-01-21 | 2015-06-03 | 西安建筑科技大学 | Forming process of rebar surface oxide layer |
| CN104668297B (en) * | 2015-01-21 | 2016-08-17 | 西安建筑科技大学 | A kind of rebar surface oxide layer generates technique |
| CN105132855A (en) * | 2015-09-29 | 2015-12-09 | 武汉赛恩冶金技术开发有限公司 | Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process |
| CN113026012A (en) * | 2021-02-24 | 2021-06-25 | 广西柳钢华创科技研发有限公司 | Method for improving anti-rusting capability of bar end by using spray |
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Application publication date: 20120328 |