CN104018074A - Low-temperature-resistant H-shaped steel and production process thereof - Google Patents
Low-temperature-resistant H-shaped steel and production process thereof Download PDFInfo
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- CN104018074A CN104018074A CN201410276250.8A CN201410276250A CN104018074A CN 104018074 A CN104018074 A CN 104018074A CN 201410276250 A CN201410276250 A CN 201410276250A CN 104018074 A CN104018074 A CN 104018074A
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Abstract
The invention discloses low-temperature-resistant H-shaped steel comprising the following chemical components in percentage by mass: 0.08-0.13% of C, 0.15-0.35% of Si, 1.25-1.45% of Mn, less than or equal to 0.01% of P, less than or equal to 0.01% of S, 0.02-0.05% of V and the balance of Fe and impurity elements. The rolling technological parameters are as follows: the heating temperature ranges from 1220 DEG C to 1240 DEG C, the initial blooming temperature ranges from 1050 DEG C to 1150 DEG C, the initial finish rolling temperature ranges from 930 DEG C to 950 DEG C, and the final finish rolling temperature ranges from 780 DEG C to 900 DEG C; the cooling technological parameters are as follows: a rolled piece is cooled to the interval of 550-650 DEG C at the speed of 100-150 DEG C/s to generate phase change, then, the rolled piece is heated to 700-750 DEG C, and finally, the H-shaped steel is naturally cooled to room temperature. The H-shaped steel can have extremely low ductile-brittle transition temperature and favorable low temperature impact resistance in high and cold areas and low-temperature environments with the temperature of 40 DEG C below zero and even lower.
Description
Technical field
The present invention relates to H shaped steel production technical field, especially relate to a kind of low temperature resistant H shaped steel and production technique thereof.
Background technology
-10 DEG C of left and right, as used H shaped steel in extremely frigid zones and low temperature environment,, in the time bearing dynamic load or impact, easily there is brittle failure in current its ductile-brittle transition temperature of H shaped steel, causes unnecessary loss.
Particularly, at the H shaped steel of-40 DEG C and following environment, the toughness of its H shaped steel is lower, and low-temperature impact resistance is poor, can not meet service requirements.
As the Chinese invention patent that publication number is CN102618781A, a kind of hot-rolled H-shaped steel for low temperature-resisting structure and preparation method thereof is disclosed, it strengthens the Composition Control to Hot Metal in Beam Blank by smelting technology, but its low-temperature flexibility of-20 DEG C has only reached average 90J.
Summary of the invention
For prior art deficiency, technical problem to be solved by this invention is to provide a kind of low temperature resistant H shaped steel and production technique thereof, to reach the object under H shaped steel low temperature environment with excellent toughness.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of low temperature resistant H shaped steel, its chemical composition quality percentage composition is: carbon 0.08～0.13%, silicon 0.15～0.35%, manganese 1.25～1.45%, phosphorus≤0.01%, sulphur≤0.01%, vanadium 0.02～0.05%, surplus is iron and impurity element.
Also comprise quality percentage composition: Als >=0.015%.
A production technique for low temperature resistant H shaped steel, its rolling technological parameter is: 1220～1240 DEG C of Heating temperatures, 1050～1150 DEG C of breaking down start rolling temperatures, 930～950 DEG C of finish rolling start rolling temperatures, 780 DEG C～900 DEG C of finish rolling finishing temperatures;
Process for cooling parameter is: rolled piece is cooled to 550～650 DEG C of interval phase transformations with 100～150 DEG C/s speed of cooling, then rises again to 700～750 DEG C, and last H shaped steel naturally cools to room temperature.
The present invention compared with prior art, has the following advantages:
Make H shaped steel under-40 DEG C and following temperature extremely frigid zones and low temperature environment, there is extremely low ductile-brittle transition temperature, good low-temperature impact resistance, the low-temperature flexibility of-40 DEG C exceedes 200J, has improved the quality of product.
Embodiment
Below by the description to embodiment, the specific embodiment of the present invention is described in further detail.
Embodiment 1, this low temperature resistant H shaped steel, its chemical composition quality percentage composition is: carbon: 0.10%, silicon: 0.23%, manganese: 1.41%, phosphorus: 0.006%, sulphur: 0.003%, vanadium: 0.036%, Als:0.021%, surplus is iron and impurity element.
This steel is through the rolling of hot metal pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank full guard casting → H section steel line, finally carries out rolled piece cooling.Wherein, the rolling of H section steel line comprises roughing and the rolling of finish rolling twice.The NM operation of the present invention, all can adopt prior art.
Wherein, rolling technological parameter is: 1230 DEG C of Heating temperatures, 1100 DEG C of breaking down start rolling temperatures, 936 DEG C of finish rolling start rolling temperatures, 885 DEG C of finish rolling finishing temperatures;
Process for cooling parameter is: rolled piece is cooled to 556 DEG C of interval phase transformations with 109 DEG C/s speed of cooling, then rises again to 712 DEG C, and last H shaped steel naturally cools to room temperature.
The mechanical property of low temperature resistant H shaped steel is in table 1.
Embodiment 2, this low temperature resistant H shaped steel, its chemical composition quality percentage composition is: carbon: 0.11%, silicon: 0.25%, manganese: 1.36%, phosphorus: 0.005%, sulphur: 0.007%, vanadium: 0.038%, Als:0.019%, surplus is iron and impurity element.
This steel is through the rolling of hot metal pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank full guard casting → H section steel line, finally carries out rolled piece cooling.Wherein, the rolling of H section steel line comprises roughing and the rolling of finish rolling twice.The NM operation of the present invention, all can adopt prior art.
Wherein, rolling technological parameter is: 1235 DEG C of Heating temperatures, 1130 DEG C of breaking down start rolling temperatures, 941 DEG C of finish rolling start rolling temperatures, 890 DEG C of finish rolling finishing temperatures;
Process for cooling parameter is: rolled piece is cooled to 579 DEG C of interval phase transformations with 105 DEG C/s speed of cooling, then rises again to 723 DEG C, and last H shaped steel naturally cools to room temperature.
The mechanical property of low temperature resistant H shaped steel is in table 1.
Embodiment 3, this low temperature resistant H shaped steel, its chemical composition quality percentage composition is: carbon: 0.10%, silicon: 0.26%, manganese: 1.39%, phosphorus: 0.007%, sulphur: 0.004%, vanadium: 0.034%, Als:0.028%, surplus is iron and impurity element.
This steel is through the rolling of hot metal pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank full guard casting → H section steel line, finally carries out rolled piece cooling.Wherein, the rolling of H section steel line comprises roughing and the rolling of finish rolling twice.The NM operation of the present invention, all can adopt prior art.
Wherein, rolling technological parameter is: 1232 DEG C of Heating temperatures, 1115 DEG C of breaking down start rolling temperatures, 945 DEG C of finish rolling start rolling temperatures, 893 DEG C of finish rolling finishing temperatures;
Process for cooling parameter is: rolled piece is cooled to 586 DEG C of interval phase transformations with 103 DEG C/s speed of cooling, then rises again to 730 DEG C, and last H shaped steel naturally cools to room temperature.
The mechanical property of low temperature resistant H shaped steel is in table 1.
Table 1 is the mechanical properties test result of low temperature resistant H shaped steel
Obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (3)
1. a low temperature resistant H shaped steel, it is characterized in that: its chemical composition quality percentage composition is: carbon 0.08～0.13%, silicon 0.15～0.35%, manganese 1.25～1.45%, phosphorus≤0.01%, sulphur≤0.01%, vanadium 0.02～0.05%, surplus is iron and impurity element.
2. low temperature resistant H shaped steel as claimed in claim 1, is characterized in that: also comprise quality percentage composition: Als >=0.015%.
3. a production technique for low temperature resistant H shaped steel as claimed in claim 1 or 2, is characterized in that:
Rolling technological parameter is: 1220～1240 DEG C of Heating temperatures, 1050～1150 DEG C of breaking down start rolling temperatures, 930～950 DEG C of finish rolling start rolling temperatures, 780 DEG C～900 DEG C of finish rolling finishing temperatures;
Process for cooling parameter is: rolled piece is cooled to 550～650 DEG C of interval phase transformations with 100～150 DEG C/s speed of cooling, then rises again to 700～750 DEG C, and last H shaped steel naturally cools to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410276250.8A CN104018074B (en) | 2014-06-19 | 2014-06-19 | A kind of low temperature resistant H profile steel and production technique thereof |
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| CN201410276250.8A CN104018074B (en) | 2014-06-19 | 2014-06-19 | A kind of low temperature resistant H profile steel and production technique thereof |
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| CN104018074B CN104018074B (en) | 2015-11-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264030A (en) * | 2014-10-28 | 2015-01-07 | 山东钢铁股份有限公司 | Dedicated low-temperature-resistant H-shaped steel for alpine region and preparation method thereof |
| CN104831154A (en) * | 2015-06-03 | 2015-08-12 | 马钢(集团)控股有限公司 | H-beam and production method thereof |
| CN107829031A (en) * | 2017-11-21 | 2018-03-23 | 安徽金阳金属结构工程有限公司 | A kind of big cross section H profile steel and its production technology |
| CN107868910A (en) * | 2017-11-21 | 2018-04-03 | 安徽金阳金属结构工程有限公司 | A kind of low temperature resistant toughness H profile steel and its production technology |
| CN107904368A (en) * | 2017-11-03 | 2018-04-13 | 山东钢铁股份有限公司 | One kind rolls rear microalloying H profile steel cryogenic property rescue method |
| CN107937808A (en) * | 2017-11-21 | 2018-04-20 | 安徽金阳金属结构工程有限公司 | A kind of hot rolled H-shaped and its production technology |
| CN109457177A (en) * | 2018-10-26 | 2019-03-12 | 包头钢铁（集团）有限责任公司 | Q345 grades of hot rolled H-shaped and its smeltings and milling method |
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| JPS5322853A (en) * | 1976-08-16 | 1978-03-02 | Sumitomo Metal Ind | Non treatment h shade steel sections manufacturing for low temperature |
| JPS5650777B2 (en) * | 1976-11-05 | 1981-12-01 | ||
| JPH06145786A (en) * | 1992-11-11 | 1994-05-27 | Kawasaki Steel Corp | Production of wide flange shape minimal in difference in mechancal property in plate thickness direction |
| CN102618781A (en) * | 2012-03-30 | 2012-08-01 | 莱芜钢铁集团有限公司 | Hot-rolled H-steel for low temperature-resistance structure and preparation method for hot-rolled H-steel |
| CN102618782A (en) * | 2012-03-30 | 2012-08-01 | 莱芜钢铁集团有限公司 | Large-specification Z-direction H-steel and preparation method thereof |
| CN102644020A (en) * | 2012-04-17 | 2012-08-22 | 马钢(集团)控股有限公司 | Cooling after rolling method for low-alloy hot-rolled H-steel with yield strength up to 500MPa |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5322853A (en) * | 1976-08-16 | 1978-03-02 | Sumitomo Metal Ind | Non treatment h shade steel sections manufacturing for low temperature |
| JPS5650777B2 (en) * | 1976-11-05 | 1981-12-01 | ||
| JPH06145786A (en) * | 1992-11-11 | 1994-05-27 | Kawasaki Steel Corp | Production of wide flange shape minimal in difference in mechancal property in plate thickness direction |
| CN102618781A (en) * | 2012-03-30 | 2012-08-01 | 莱芜钢铁集团有限公司 | Hot-rolled H-steel for low temperature-resistance structure and preparation method for hot-rolled H-steel |
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| CN102644020A (en) * | 2012-04-17 | 2012-08-22 | 马钢(集团)控股有限公司 | Cooling after rolling method for low-alloy hot-rolled H-steel with yield strength up to 500MPa |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264030A (en) * | 2014-10-28 | 2015-01-07 | 山东钢铁股份有限公司 | Dedicated low-temperature-resistant H-shaped steel for alpine region and preparation method thereof |
| CN104831154A (en) * | 2015-06-03 | 2015-08-12 | 马钢(集团)控股有限公司 | H-beam and production method thereof |
| CN107904368A (en) * | 2017-11-03 | 2018-04-13 | 山东钢铁股份有限公司 | One kind rolls rear microalloying H profile steel cryogenic property rescue method |
| CN107829031A (en) * | 2017-11-21 | 2018-03-23 | 安徽金阳金属结构工程有限公司 | A kind of big cross section H profile steel and its production technology |
| CN107868910A (en) * | 2017-11-21 | 2018-04-03 | 安徽金阳金属结构工程有限公司 | A kind of low temperature resistant toughness H profile steel and its production technology |
| CN107937808A (en) * | 2017-11-21 | 2018-04-20 | 安徽金阳金属结构工程有限公司 | A kind of hot rolled H-shaped and its production technology |
| CN109457177A (en) * | 2018-10-26 | 2019-03-12 | 包头钢铁（集团）有限责任公司 | Q345 grades of hot rolled H-shaped and its smeltings and milling method |
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|---|---|
| CN104018074B (en) | 2015-11-18 |
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