CN105132855A - Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process - Google Patents
Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process Download PDFInfo
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- CN105132855A CN105132855A CN201510633609.7A CN201510633609A CN105132855A CN 105132855 A CN105132855 A CN 105132855A CN 201510633609 A CN201510633609 A CN 201510633609A CN 105132855 A CN105132855 A CN 105132855A
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Abstract
The invention relates to a novel process for producing hot rolled threaded steel with an on-line surface rustproof function through a post-rolling water penetration controlled cooling process, discloses a low-cost manufacturing process for producing the hot rolled threaded steel, and is mainly specific to a novel process for producing the hot rolled threaded steel with the on-line surface rustproof function by the adoption of the water penetration hot rolled threaded steel production process after hot rolling. By means of the thermodynamic and dynamic principles of an oxidation reaction of the threaded steel, the threaded steel is subjected to special surface cleaning treatment and an oxygen penetration process before or after the water penetration controlled cooling process of the hot rolled threaded steel, or before and after the cooling process of the hot rolled threaded steel, so that an even and compact oxidation film is formed on the surface of the hot rolled threaded steel rapidly; meanwhile, the components and uniformity of the oxidation film are controlled, so that the propose of corrosion resistance is achieved and the problem that the hot rolled threaded steel produced through the water penetration cooling is corroded severely in the atmosphere is solved. The novel process for producing the hot rolled threaded steel can not only improve the customer satisfaction degree, but also make a positive contribution to energy conservation and environmental protection of China.
Description
Technical field
The present invention relates to metallurgy and metallic substance manufacture field, specifically a kind of hot rolling ribbed steel bar production line, the production technique that Deformed Steel Bars surface is antirust online.
Background technology
Generally there are two kinds of different roller repairing techniques in domestic hot rolling ribbed steel bar production line, a kind of is naturally cooling after hot rolling; Another kind of in order to reduce hot rolling material cost of alloy, rear Water cooling production technique is rolled in employing, and the cooling fast of rolled piece surface, inhibits rolled piece to roll rear recrystallize, thus crystal grain thinning, obtain the metallographic structure expected and reach the object improving mechanical property.
Hot rolling ribbed steel bar adopts the mode of production of rolling rear naturally cooling, needs in steel, add a certain amount of reinforced alloys element, rolls rear thread steel surface and defines the comparatively fine and close oxide skin of one deck, have good erosion resistance; Adopt the Deformed Steel Bars rolling the production of rear Water cooling technique, the oxide film on its surface comes off or oxide skin stress is increased because wearing water for cooling and comes off wearing in water process to be broken up, and form the discontinuous oxide film of high price iron, surface does not have the oxide skin of fine and close iron at a low price, reduce antirust ability, surface serious corrosion can cause weight saving, degradation, as hot-rolled ribbed bars surface corrosion for building seriously may cause can not for the consequence known.
After rolling, wear the propagation and employment of water control refrigeration technique at each steel mill hot rolling ribbed steel bar production line, drastically reduce the area the interpolation of reinforced alloys element, reduce production cost, but the easy corrosion problem of hot rolling material after wearing water, become the subject matter of puzzlement enterprise.More domestic enterprise's active research, develop online or off-line to technology such as rebar surface rust prevention by applying liquid material agent, but due to input cost high and easily cause environmental pollution, do not approved by industry and promote the use of.So it is very urgent and necessary for improving the Deformed Steel Bars surface antirust ability wearing water explained hereafter after hot rolling is rolled.
Summary of the invention
When the object of the invention is to roll rear Water cooling production technique for each hot rolling ribbed steel bar production line employing, provide a kind of online surface of stocking efficiently antirust production technique, to solve the hot rolling material problem that extent of corrosion is serious in an atmosphere of Water cooling production.
Wear the novel process that the online surface of the cold explained hereafter of water control is antirust after a kind of hot rolling ribbed steel bar of the present invention rolls, after its Deformed Steel Bars rolls, wear water cooling control technology front end or end, then or front end and end all carry out strengthening peroxide oxide treatment.
The novel process that the online surface of the cold explained hereafter of water control is antirust is worn after a kind of hot rolling ribbed steel bar of the present invention rolls, in order to make in Deformed Steel Bars better quality, after its Deformed Steel Bars rolls, wear water cooling control technology front end or end, then or front end and end carry out adding before strengthening peroxide oxide treatment together with surface cleaning treatment process.
The novel process that the online surface of the cold explained hereafter of water control is antirust is worn after a kind of hot rolling ribbed steel bar rolls, water cooling control technology front end or end is worn after described Deformed Steel Bars rolls, again or front end and end all to carry out strengthening peroxide oxide treatment be that a cavity wears oxygen equipment, thermodynamics and kinetics condition is created for rolled piece surface forms dense oxidation film, equipment comprises: cavity, cavity is provided with relief valve, circulating collection pipeline, oxygen concentration proofing unit.
Wear the novel process that the online surface of the cold explained hereafter of water control is antirust after hot rolling ribbed steel bar rolls, to wear when strengthening peroxide oxide treatment is carried out in water cooling control technology front end Deformed Steel Bars surface temperature control after described Deformed Steel Bars rolls at 850 ~ 1000 DEG C; When end carries out strengthening peroxide oxide treatment, Deformed Steel Bars surface temperature control is at 450 ~ 750 DEG C.
The novel process that the online surface of the cold explained hereafter of water control is antirust is worn after a kind of hot rolling ribbed steel bar rolls, because each production line rolls the difference of rear device space layout, the pressure of gas and adjustable controlled, the surperficial Strong oxdiative device of oxygen concentration can according to scene concrete locus designs, equipment concrete shape size is arranged according to site space position, generally be designed to rectangular parallelepiped or round shape, if wide, the high or round shape diameter of rectangular parallelepiped is fixed, length is so only had to be parameter, so the time of passing in oxygen equipment worn by Deformed Steel Bars at cavity, and namely length determines pressure, the concentration of oxygen supply.
Pressure, the concentration of described oxygen supply can experimentally obtain this method:
1), look for several different Deformed Steel Bars rolling line, after Deformed Steel Bars rolls, wear water cooling control technology front end or end, then or front end and end spatial design high wide or that diameter is identical cavity be installed wear oxygen equipment.
2), wear in oxygen equipment at the cavity of same length, to wear in oxygen equipment to cavity with different pressures and cure by oxygen therapy, obtain different concentration well-oxygenated environments, thus obtain the Deformed Steel Bars of surperficial different mass, and it is comparatively fine and close to find out surface scale from experiment, determine not only economical, but also the measured common oxygen supply pressure of matter and a concentration.
3), from the cavity of different length wear the experiment of oxygen equipment that to find out surface scale comparatively fine and close, determine not only economical, but also the measured common oxygen supply pressure of matter and a concentration.
4), determine one not only economical, but also the measured common oxygen supply pressure of matter and concentration after, then implement one-time authentication, confirm optimum oxygen supply pressure and concentration.
5) quality of the Deformed Steel Bars, after surface strengthening peroxide oxide treatment is undertaken detecting and judging by existing hot rolled ribbed steel bar national standard.
The present invention utilizes Deformed Steel Bars to be oxidized the thermodynamics and dynamics principle of reflection, at hot rolling material after Water cooling, Deformed Steel Bars is by the purifying treatment process of special surface and wear oxygen (Deformed Steel Bars is by a cavity, oxygen-rich air in cavity) technique, its surface is impelled to form evenly comparatively fine and close oxide film fast, thus reach etch-proof object, concrete online antirust production technique comprises heating steel billet, billet rolling, surface Strong oxdiative, roll rear Water cooling, clean surface, surface Strong oxdiative, shear bundling, the flow processs such as packaging warehouse-in, because each production line rolls the difference of rear device space layout, clean surface gasifying device, surface Strong oxdiative device can according to scene concrete locus design.
Wherein said billet heating temperature is 1100 ~ 1200 DEG C;
Described billet rolling start rolling temperature is 950 ~ 1050 DEG C, and finishing temperature is 900 ~ 1000 DEG C;
Described roll after to wear water conservancy project skill be directly enter control cold water storage cistern after rolled piece finish to gauge, under the hydraulic pressure of 1.1 ~ 2.0Mpa, cool through the time of 2s ~ 5s, rolled piece temperature is down to 450 ~ 750 DEG C, inhibit rolled piece to roll rear recrystallize, refinement crystal grain, controls and ensure that the mechanical property of Deformed Steel Bars;
Described rolled piece clean surface be rolled piece through special purifying treatment unit, before this device is positioned at and wears oxygen Strong oxdiative device, the purifying process of oxide skin of physical method is carried out to rolled piece surface, makes rolled piece smooth surface, clean and tidy, be beneficial to Strong oxdiative;
Described surface oxidation technique is positioned to wear water cooling control technology front end or end again or front end and end after Deformed Steel Bars rolls, be that a cavity wears oxygen equipment, thermodynamics and kinetics condition is created for rolled piece surface forms dense oxidation film, be provided with relief valve, circulating collection pipeline, oxygen concentration proofing unit, guarantee surface oxidation is abundant, and oxide skin is thin and fine and close.
Described cavity is worn and sustainablely in oxygen equipment is connected with oxygen-air mixture body, the pressure of gas and oxygen concentration adjustable controlled, equipment concrete shape size can be arranged according to site space position, after wearing oxygen device by cavity, adjustments of gas pressure, ensure time enough, make the oxide film of rolled piece Surface Creation densification.
The antirust novel process in the online surface of water control cold explained hereafter Deformed Steel Bars is worn in a kind of hot rolling of the present invention advantage after rolling is: do not change Water cooling hot rolling line ironmaking, steel-making, steel rolling, roll after wear the techniques such as water, reaching the interpolation of minimizing reinforced alloys element, while meeting Deformed Steel Bars performance need, adopt the purifying process of special surface flexibly and oxygen-enriching device, its surface is impelled to form evenly comparatively fine and close oxide film fast, reach etch-proof object, the economy that tool is higher and the feature of environmental protection.
Accompanying drawing explanation
Fig. 1 is the schema of embodiment one.
Fig. 2 is the schema of embodiment two.
Fig. 3 is the schema of embodiment three
Embodiment
embodiment one
For content clearly of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.As shown in Figure 1, the antirust novel process in the online surface of water control cold explained hereafter Deformed Steel Bars is worn in a kind of hot rolling after rolling, the concrete technological process of production mainly comprises heating steel billet, billet rolling, rolls rear Water cooling, clean surface, surperficial Strong oxdiative, shear the flow process such as bundling, packaging warehouse-in, implements according to following steps:
Step 1: steel billet is sent in heating-furnace and heats;
Step 2: rolled piece is rolled by the processing requirement of technique rolling schedule;
Step 3: the reinforcing bar through finished frame rolling enters passing water cooler, cooling pressure 1.1 ~ 2.0Mpa, Twisted Steel surface temperature is cooled to 450 ~ 750 DEG C;
Step 4: enter surface cleaning treatment unit through overcooling rear thread steel, unsound oxide skin of this device double thread steel surface attachment is tentatively cleared up;
Step 5: reinforcing bar is after surface cleaning process; enter and wear oxygen device; lasting air and the mixed gas of industrial oxygen is connected with in control device; controlling oxygen concentration in this mixed gas is 21% ~ 60%; mixture pressure is 1.6Mpa ~ 0.1Mpa, carries out strengthening peroxide oxide treatment by control oxygen concentration and gaseous tension double thread rebar surface;
Step 6: bar cutting bundling;
Step 7: reinforcing bar packaging warehouse-in.
The process flow sheet of the online surperficial antirust production Deformed Steel Bars of 1 one kinds, accompanying drawing
embodiment two
For content clearly of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.As shown in Figure 2, the antirust novel process in the online surface of water control cold explained hereafter Deformed Steel Bars is worn in a kind of hot rolling after rolling, the concrete technological process of production mainly comprises heating steel billet, billet rolling, clean surface, surperficial Strong oxdiative, rolls rear Water cooling, shears bundling, packs the flow processs such as warehouse-in, implements according to following steps:
Step 1: steel billet is sent in heating-furnace and heats;
Step 2: rolled piece is rolled by the processing requirement of technique rolling schedule;
Step 3: enter surface cleaning treatment unit through rolling rear thread steel, unsound oxide skin of this device double thread steel surface attachment is tentatively cleared up;
Step 4: reinforcing bar is after surface cleaning process, enter and wear oxygen device, lasting air and the mixed gas of industrial oxygen is connected with in control device, controlling oxygen concentration in this mixed gas is 21% ~ 60%, mixture pressure is 1.6Mpa ~ 0.1Mpa, carries out strengthening peroxide oxide treatment by control oxygen concentration and gaseous tension double thread rebar surface.
Step 5: the reinforcing bar after wearing oxygen device oxidation enters passing water cooler, cooling pressure 1.1 ~ 2.0Mpa, and Twisted Steel surface temperature is cooled to 450 ~ 750 DEG C;
Step 6: bar cutting bundling;
Step 7: reinforcing bar packaging warehouse-in.
embodiment three
For content clearly of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.As shown in Figure 3, the antirust novel process in the online surface of water control cold explained hereafter Deformed Steel Bars is worn in a kind of hot rolling after rolling, the concrete technological process of production mainly comprises heating steel billet, billet rolling, clean surface, surperficial Strong oxdiative, rolls rear Water cooling, clean surface, surperficial Strong oxdiative, shear the flow process such as bundling, packaging warehouse-in, implements according to following steps:
Step 1: steel billet is sent in heating-furnace and heats;
Step 2: rolled piece is rolled by the processing requirement of technique rolling schedule;
Step 3: enter surface cleaning treatment unit through rolling rear thread steel, unsound oxide skin of this device double thread steel surface attachment is tentatively cleared up;
Step 4: reinforcing bar is after surface cleaning process, enter and wear oxygen device, lasting air and the mixed gas of industrial oxygen is connected with in control device, controlling oxygen concentration in this mixed gas is 21% ~ 60%, mixture pressure is 1.6Mpa ~ 0.1Mpa, carries out strengthening peroxide oxide treatment by control oxygen concentration and gaseous tension double thread rebar surface.
Step 5: the reinforcing bar after wearing oxygen device oxidation enters passing water cooler, cooling pressure 1.1 ~ 2.0Mpa, and Twisted Steel surface temperature is cooled to 450 ~ 750 DEG C;
Step 6: enter secondary surface purifying processing device through overcooling rear thread steel, unsound oxide skin of this device double thread steel surface attachment is cleared up again;
Step 7: reinforcing bar is after surface cleaning process, enter and wear oxygen device, lasting air and the mixed gas of industrial oxygen is connected with in control device, controlling oxygen concentration in this mixed gas is 21% ~ 60%, mixture pressure is 1.6Mpa ~ 0.1Mpa, carries out strengthening peroxide oxide treatment by control oxygen concentration and gaseous tension double thread rebar surface.
Step 8: bar cutting bundling;
Step 9: reinforcing bar packaging warehouse-in.
The above is only preferred three kinds of embodiments of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a hot rolling ribbed steel bar wears the antirust novel process in the online surface of the cold explained hereafter of water control after rolling, it is characterized in that: wear water cooling control technology after its hot rolling ribbed steel bar rolls before or after cooling control technology, then or all carry out strengthening peroxide oxide treatment before wearing water cooling control technology with after cooling control technology.
2. a Ju a kind of hot rolling ribbed steel bar according to claim 1 wears the antirust novel process in the online surface of the cold explained hereafter of water control after rolling, it is characterized in that: in order to make in Deformed Steel Bars better quality, after its Deformed Steel Bars rolling together with adding before strengthening peroxide oxide treatment surface cleaning treatment process.
3. a Ju a kind of hot rolling ribbed steel bar according to claim 1 wears the antirust novel process in the online surface of the cold explained hereafter of water control after rolling, it is characterized in that: after described Deformed Steel Bars rolls, wear water cooling control technology front end or end, again or front end and end carry out strengthening peroxide oxidation processing technique, strengthening peroxide oxidation processing technique device is that a cavity wears oxygen equipment, thermodynamics and kinetics condition is created for rolled piece surface forms dense oxidation film, equipment comprises: cavity, cavity is provided with relief valve, circulating collection pipeline, oxygen concentration proofing unit.
4. a Ju a kind of hot rolling ribbed steel bar according to claim 1 wears the antirust novel process in the online surface of the cold explained hereafter of water control after rolling, it is characterized in that: to wear when strengthening peroxide oxide treatment is carried out in water cooling control technology front end Deformed Steel Bars surface temperature control after described Deformed Steel Bars rolls at 850 ~ 1000 DEG C; Deformed Steel Bars surface temperature control is worn when water cooling control technology end carries out strengthening peroxide oxide treatment at 450 ~ 750 DEG C after described Deformed Steel Bars rolls.
5. a Ju a kind of hot rolling ribbed steel bar according to claim 3 wears the antirust novel process in the online surface of the cold explained hereafter of water control after rolling, it is characterized in that: because each production line rolls the difference of rear device space layout, gas composition is mainly the mixed gas of industrial pure oxygen or oxygen and air, the pressure of gas and oxygen concentration adjustable controlled, surface Strong oxdiative device can according to scene concrete locus design, equipment concrete shape size is arranged according to site space position, generally be designed to rectangular parallelepiped or round shape, if rectangular parallelepiped is wide, high or round shape diameter is fixed, length is so only had to be parameter, so the time of passing in oxygen equipment worn by Deformed Steel Bars at cavity, namely length determines the pressure of oxygen supply, concentration,
Pressure, the concentration of described oxygen supply can experimentally obtain this method:
1), look for several different Deformed Steel Bars rolling line, after Deformed Steel Bars rolls, wear water cooling control technology front end or end, then or high wide or that diameter the is identical cavity of front end and end spaces design and installation wear oxygen equipment;
2), wear in oxygen equipment at the cavity of same length, to wear in oxygen equipment to cavity with different pressures and cure by oxygen therapy, obtain different concentration well-oxygenated environments, thus obtain the Deformed Steel Bars of surperficial different mass, and it is comparatively fine and close to find out surface scale from experiment, determine not only economical, but also the measured common oxygen supply pressure of matter and a concentration;
3), from the cavity of different length wear the experiment of oxygen equipment that to find out surface scale comparatively fine and close, determine not only economical, but also the measured common oxygen supply pressure of matter and a concentration;
4), determine one not only economical, but also the measured common oxygen supply pressure of matter and concentration after, then implement one-time authentication, confirm optimum oxygen supply pressure and concentration;
5) quality of the Deformed Steel Bars, after surface strengthening peroxide oxide treatment is undertaken detecting and judging by existing hot rolled ribbed steel bar national standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633609.7A CN105132855A (en) | 2015-09-29 | 2015-09-29 | Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633609.7A CN105132855A (en) | 2015-09-29 | 2015-09-29 | Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process |
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| CN105132855A true CN105132855A (en) | 2015-12-09 |
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| CN201510633609.7A Pending CN105132855A (en) | 2015-09-29 | 2015-09-29 | Novel process for producing hot rolled threaded steel with on-line surface rustproof function through post-rolling water penetration controlled cooling process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111698A (en) * | 2016-07-16 | 2016-11-16 | 首钢总公司 | A kind of controlled rolling and controlled cooling reinforcing bar hinders the production method of rust online |
| CN110773578A (en) * | 2019-11-15 | 2020-02-11 | 中冶华天工程技术有限公司 | System and method for adjusting parameters of hot-rolled threaded steel post-rolling cooling water tank based on artificial intelligence |
| CN114309061A (en) * | 2021-11-24 | 2022-04-12 | 盐城市联鑫钢铁有限公司 | Technology for controlling oxide scale structure of fine-grain hot-rolled steel bar on line |
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| WO2010114083A1 (en) * | 2009-03-30 | 2010-10-07 | Ｊｆｅスチール株式会社 | Cooling device for hot rolled steel sheet |
| CN102392210A (en) * | 2011-10-27 | 2012-03-28 | 莱芜钢铁集团有限公司 | On-line rust-proof method for twisted steel |
| CN103695837A (en) * | 2013-11-29 | 2014-04-02 | 莱芜钢铁集团有限公司 | Construction reinforcement surface rust prevention method |
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2015
- 2015-09-29 CN CN201510633609.7A patent/CN105132855A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010114083A1 (en) * | 2009-03-30 | 2010-10-07 | Ｊｆｅスチール株式会社 | Cooling device for hot rolled steel sheet |
| CN102392210A (en) * | 2011-10-27 | 2012-03-28 | 莱芜钢铁集团有限公司 | On-line rust-proof method for twisted steel |
| CN103695837A (en) * | 2013-11-29 | 2014-04-02 | 莱芜钢铁集团有限公司 | Construction reinforcement surface rust prevention method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111698A (en) * | 2016-07-16 | 2016-11-16 | 首钢总公司 | A kind of controlled rolling and controlled cooling reinforcing bar hinders the production method of rust online |
| CN110773578A (en) * | 2019-11-15 | 2020-02-11 | 中冶华天工程技术有限公司 | System and method for adjusting parameters of hot-rolled threaded steel post-rolling cooling water tank based on artificial intelligence |
| CN114309061A (en) * | 2021-11-24 | 2022-04-12 | 盐城市联鑫钢铁有限公司 | Technology for controlling oxide scale structure of fine-grain hot-rolled steel bar on line |
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Application publication date: 20151209 |