CN102115847A - Production process of IV grade deformed steel bars - Google Patents
Production process of IV grade deformed steel bars Download PDFInfo
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- CN102115847A CN102115847A CN2010106125445A CN201010612544A CN102115847A CN 102115847 A CN102115847 A CN 102115847A CN 2010106125445 A CN2010106125445 A CN 2010106125445A CN 201010612544 A CN201010612544 A CN 201010612544A CN 102115847 A CN102115847 A CN 102115847A
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- steel bars
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- deformed steel
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Abstract
The invention relates to a production process of deformed steel bars, in particular to a production process of IV grade deformed steel bars. The steel grade comprises the following chemical components in percentage by weight: 0.23-0.28% of C, 0.72-0.85% of Si, 1.50-1.62% of Mn, 0.50-0.55% of Ceq and balance of iron and inevitable impurities. According to the production process, the rolling temperature is 1000-1100 DEG C, the temperature of the soaking section of a heating furnace is controlled to be 1050-1200 DEG C, and the temperature of the heating section is controlled by referring to the temperature of the soaking section. In the invention, under the condition of adopting lower rolling temperature than normal temperature, the rolling technological measures are controlled to improve the overall properties such as strength, toughness and the like of hot rolled steel, and the properties of the rolled steel can be controlled to be equal to or higher than that of the existing heat-treated steel; and no other alloy elements are added, the components are controlled to be in a standard range and an optimal chemical component formula is selected, thus ensuring the product quality and effectively reducing the product cost.
Description
Technical field
The present invention relates to the Deformed Steel Bars production technique, particularly a kind of IV level Deformed Steel Bars production technique.
Background technology
At present, the technical characterstic of production IV level Deformed Steel Bars is: enhanced product performance since one, adding microalloy; Two, after finish rolling, increase and wear water-chilling plant and be used for enhancing product performance.The interpolation of microalloy can improve the cost of product; Wearing water influences the welding property of meeting Deformed Steel Bars, therefore wear the water reinforcing bar from July, 09 country stopped producing.
Summary of the invention
The present invention is intended to solve the described problem of background technology, at existing working condition, provides a kind of by improving technology, is not adding alloy material, is not wearing the IV level Deformed Steel Bars production technique of producing higher-strength under the water condition.
The technical scheme that the present invention solves described problem employing is: a kind of IV level Deformed Steel Bars production technique, it is characterized in that: contained chemical ingredients and shared parts by weight are C:0.23～0.28%, Si:0.72～0.85%, Mn:1.50～1.62%, Ceq:0.50～0.55%, all the other are iron and inevitably are mingled with; Its start rolling temperature is between 1000-1100 ℃.
Described IV level Deformed Steel Bars production technique, its process furnace soaking zone temperature is controlled at 1050-1200 ℃, time inside furnace: cool base＜2 hour, hot base＜1.5 hour; When stopping rolling time t≤30 minute, the soaking zone temperature is controlled at 950～1000 ℃; When 30＜t≤60 minute, the soaking zone temperature is controlled at 750～800 ℃; When t＞60 minute, process furnace is not cutting off under sky, the coal gas prerequisite being lower than 700 ℃ of insulations, and then to reduce empty, gas flow gradually be zero until flow if can't reduce to 700 ℃; The heating zone temperature is controlled with reference to the soaking zone temperature.
Thereafter technology is identical with traditional technology, and the qualified steel billet of process furnace heating is sent into finishing mill after rolling 7 passages of 500 3 roller roughing mills rolling, shears by multiple length and sends into cold bed, at the cooled reinforcing bar of cold bed bundling warehouse-in after scale is sheared corresponding size.
Compared with prior art, the present invention can effectively improve the product over-all properties, helps reducing the product comprehensive cost.Reason is as follows:
One, the present invention adopts under than the low slightly condition of pair rolling temperature, utilizes the controlled rolling technological measure to improve the over-all propertieies such as intensity, toughness of hot-strip, and the performance of controlled rolling steel can reach or surpass the performance of existing thermal treatment steel.
Its two, the present invention does not add other alloying element, control composition in standard range, select the optimum chemical composition prescription, guaranteed quality product.Reduce the consumption of microalloy material (alum, niobium, titanium etc.) and reduced Heating temperature and can (minimizing energy consumption) effectively reduce product cost.
Embodiment
Below in conjunction with embodiment in detail the present invention is described in detail.
Embodiment 1:
Technological temperature control: start rolling temperature is controlled at 1060 ± 20 ℃.
Embodiment 2:
Technological temperature control: start rolling temperature is controlled at 1060 ± 20 ℃.
Embodiment 3:
Technological temperature control: start rolling temperature is controlled at 1060 ± 20 ℃.
Embodiment 4:
Technological temperature control: start rolling temperature is controlled at 1060 ± 20 ℃.
Embodiment 5:
Technological temperature control: start rolling temperature is controlled at 1060 ± 20 ℃.
Product performance control among the above embodiment sees the following form.
Embodiment 1:
Embodiment 2:
Embodiment 3:
Embodiment 4:
Embodiment 5:
Claims (2)
1. IV level Deformed Steel Bars production technique, it is characterized in that: contained chemical ingredients and shared parts by weight are C:0.23～0.28%, Si:0.72～0.85%, Mn:1.50～1.62%, Ceq:0.50～0.55%, all the other are for iron and inevitably be mingled with; Its start rolling temperature is between 1000-1100 ℃.
2. IV level Deformed Steel Bars production technique according to claim 1, it is characterized in that: process furnace soaking zone temperature is controlled at 1050-1200 ℃, time inside furnace: cool base＜2 hour, hot base＜1.5 hour; When stopping rolling time t≤30 minute, the soaking zone temperature is controlled at 950～1000 ℃; When 30＜t≤60 minute, the soaking zone temperature is controlled at 750～800 ℃; When t＞60 minute, process furnace is not cutting off under sky, the coal gas prerequisite being lower than 700 ℃ of insulations, and then to reduce empty, gas flow gradually be zero until flow if can't reduce to 700 ℃; The heating zone temperature is controlled with reference to the soaking zone temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106125445A CN102115847A (en) | 2010-12-30 | 2010-12-30 | Production process of IV grade deformed steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106125445A CN102115847A (en) | 2010-12-30 | 2010-12-30 | Production process of IV grade deformed steel bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115847A true CN102115847A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106125445A Pending CN102115847A (en) | 2010-12-30 | 2010-12-30 | Production process of IV grade deformed steel bars |
Country Status (1)
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| CN (1) | CN102115847A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080169050A1 (en) * | 2007-01-15 | 2008-07-17 | Sl Steel Group Holding Company Limited | Method for manufacturing prime hot rolled high tensile strength deformed bars |
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
| CN101327491A (en) * | 2007-06-18 | 2008-12-24 | 首钢总公司 | Method for producing high-intensity fine rolling screwed reinforcement |
-
2010
- 2010-12-30 CN CN2010106125445A patent/CN102115847A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080169050A1 (en) * | 2007-01-15 | 2008-07-17 | Sl Steel Group Holding Company Limited | Method for manufacturing prime hot rolled high tensile strength deformed bars |
| CN101327491A (en) * | 2007-06-18 | 2008-12-24 | 首钢总公司 | Method for producing high-intensity fine rolling screwed reinforcement |
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《工业炉》 19991130 张据理，等 "包钢线材厂棒材加热炉节能综述" 13 1 第21卷, 第4期 * |
| 张据理，等: ""包钢线材厂棒材加热炉节能综述"", 《工业炉》, vol. 21, no. 4, 30 November 1999 (1999-11-30), pages 13 * |
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| PB01 | Publication | ||
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Application publication date: 20110706 |