CN108517467A - A kind of production method of low-temperature high-toughness electric power pylon angle steel - Google Patents
A kind of production method of low-temperature high-toughness electric power pylon angle steel Download PDFInfo
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- CN108517467A CN108517467A CN201810475618.1A CN201810475618A CN108517467A CN 108517467 A CN108517467 A CN 108517467A CN 201810475618 A CN201810475618 A CN 201810475618A CN 108517467 A CN108517467 A CN 108517467A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The present invention discloses a kind of production method of low-temperature high-toughness electric power pylon angle steel, it includes the following steps：(a) pneumatic steelmaking is carried out as raw material using molten iron and steel scrap and obtains molten steel；The tapping temperature of the molten steel is 1620~1670 DEG C；(b) LF refining is carried out to the molten steel, the LF refining includes making white slag using auxiliary material to carry out deoxidation and the adjustment of adduction gold to molten steel, and 1~3kg of lime, 0.8~1.5kg of 0.5~2.0kg of silicon carbide, 50~80kg of ferrochrome steel and aluminum steel is added in molten steel per ton；(c) continuous casting is carried out to molten steel obtained by step (b) and obtains strand, the degree of superheat of the continuous casting is 15~40 DEG C；(d) strand is subjected to roll forming, the start rolling temperature of the roll forming is 1000~1200 DEG C, and finishing temperature is 850~880 DEG C, and rolling pass is 10~12 passages, and compression ratio is 8.3~20.To ensure that electric power pylon especially low temp area runs the safety and stabilization of steel tower.
Description
Technical field
The invention belongs to alloy steel material fields, are related to a kind of angle steel, and in particular to a kind of low-temperature high-toughness electric power pylon
With the production method of angle steel.
Background technology
As China couples the extra-high voltage bulk transmission grid and UHV transmission work of large-scale Energy Base and main loads center
The iterative method of Cheng Jianshe, form extensive " transferring electricity from the west to the east ", " sending in nortel south " energy source configuration pattern.And UHV transmission
Steel tower plays the important function of power Transmission as main transmission of electricity carrier.UHV transmission line engineering is to steel tower angle steel object
Mechanical performance is managed to require with high tenacity, it is substantially not increased in production cost, in order to ensure electric power pylon (especially
Low temp area run steel tower) safety and stabilization, need develop low-temperature high-toughness electric power pylon angle steel.
Invention content
For above-mentioned technical deficiency, the object of the present invention is to provide a kind of low-temperature high-toughness electric power pylon angle steel
Production method.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of low-temperature high-toughness electric power pylon angle
The production method of steel, the low-temperature high-toughness electric power pylon angle steel include the chemical composition of following mass percent：C：0.13
~0.16%, Si：0.25~0.40%, Mn：1.4~1.8%, P：≤ 0.019%, S：≤ 0.001%, V：0.05~
0.08%, Al：>=0.015%, surplus is Fe and inevitable impurity, it includes the following steps：
(a) pneumatic steelmaking is carried out as raw material using molten iron and steel scrap and obtains molten steel；The tapping temperature of the molten steel be 1620~
1670 DEG C, when molten steel tapping be added into molten steel per ton 0.3~0.8kg of calcium carbide, 0.5~2kg of aluminium block, 2~5kg of lime,
5~10kg of refining slag, 3~8kg of 10~15kg of potassium steel, 25~35kg of high chrome and low nitrogen carburant, and control the molten steel
The mass percentage content of middle C is 0.13~0.16%, the mass percentage content of P is 0.001~0.020% and the quality of S
Degree is 0.005~0.030%；
(b) LF refining is carried out to the molten steel, the LF refining includes making white slag using auxiliary material to carry out deoxidation to molten steel
It is adjusted with adduction gold, 1~3kg of lime, 0.5~2.0kg of silicon carbide, 50~80kg of ferrochrome steel and aluminum steel 0.8 is added in molten steel per ton
~1.5kg；The molten steel enters LF stoves and arrives at a station 1480~1550 DEG C of temperature, 1540~1580 DEG C of out-station temperature, refining time 50
~70min, 15~50min of white slag retention time；
(c) continuous casting is carried out to molten steel obtained by step (b) and obtains strand, the degree of superheat of the continuous casting is 15~40 DEG C；
(d) strand is subjected to roll forming, the start rolling temperature of the roll forming is 1000~1200 DEG C, eventually
It is 850~880 DEG C to roll temperature, and rolling pass is 10~12 passages, and compression ratio is 8.3~20.
Optimally, in step (a), be added into molten steel per ton calcium carbide 0.5kg, aluminium block 1kg, lime 3kg, refining slag 6kg,
Potassium steel 12kg, high chrome 30kg and low nitrogen carburant 5kg.
Optimally, in step (b), lime 2kg, silicon carbide 1.5kg, ferrochrome 60kg and aluminum steel 1kg is added in molten steel per ton.
The beneficial effects of the present invention are：The present invention is by using specific roll forming technique cooperation pneumatic steelmaking, LF
Refining etc. techniques, can realize in the case that production cost it is substantially not increased (angle steel cost with intensity Q345, Q420 grade
C grades of steel costs remain basically stable), the toughness index of product promotes (more than the toughness reguirements of D grades of steel), makes electric power pylon steel technology
Level is obviously improved, to ensure that electric power pylon especially low temp area runs the safety and stabilization of steel tower.
Specific implementation mode
The production method of low-temperature high-toughness electric power pylon angle steel of the present invention, the low-temperature high-toughness electric power pylon angle steel
Include the chemical composition of following mass percent：C：0.13~0.16%, Si：0.25~0.40%, Mn：1.4~1.8%, P：
≤ 0.019%, S：≤ 0.001%, V：0.05~0.08%, Al：>=0.015%, surplus be Fe and inevitable impurity, it
Include the following steps：(a) pneumatic steelmaking is carried out as raw material using molten iron and steel scrap and obtains molten steel；The tapping temperature of the molten steel is 1620
~1670 DEG C, when molten steel tapping be added into molten steel per ton 0.3~0.8kg of calcium carbide, 0.5~2kg of aluminium block, lime 2~
5kg, 5~10kg of refining slag, 3~8kg of 10~15kg of potassium steel, 25~35kg of high chrome and low nitrogen carburant, and described in control
The mass percentage content of C is 0.13~0.16% in molten steel, the mass percentage content of P is 0.001~0.020% and S
Mass percentage content is 0.005~0.030%；(b) LF refining is carried out to the molten steel, the LF refining includes using auxiliary material
White slag is made to carry out deoxidation and the adjustment of adduction gold to molten steel, 1~3kg of lime, 0.5~2.0kg of silicon carbide, chromium is added in molten steel per ton
0.8~1.5kg of 50~80kg of iron steel and aluminum steel；The molten steel enters LF stoves and arrives at a station 1480~1550 DEG C of temperature, out-station temperature
1540~1580 DEG C, 50~70min of refining time, 15~50min of white slag retention time；(c) molten steel obtained by step (b) is carried out
Continuous casting obtains strand, and the degree of superheat of the continuous casting is 15~40 DEG C；(d) strand is subjected to roll forming, the rolling
Molding start rolling temperature is 1000~1200 DEG C, and finishing temperature is 850~880 DEG C, and rolling pass is 10~12 passages, compression ratio
It is 8.3~20.Can realize in the case that production cost it is substantially not increased (angle steel cost with intensity Q345, Q420 grade C
Grade steel cost remains basically stable), the toughness index of product promotes (more than the toughness reguirements of D grades of steel), makes electric power pylon steel technology
Level is obviously improved, to ensure that electric power pylon especially low temp area runs the safety and stabilization of steel tower.
In above-mentioned steps (a), calcium carbide 0.5kg, aluminium block 1kg, lime 3kg, refining slag 6kg, height are added into molten steel per ton
Manganese steel 12kg, high chrome 30kg and low nitrogen carburant 5kg；In step (b), lime 2kg, silicon carbide 1.5kg is added in molten steel per ton,
Ferrochrome 60kg and aluminum steel 1kg.
It is described in detail below in conjunction with to the preferred embodiment of the invention：
Embodiment 1
The present embodiment provides a kind of production methods of low-temperature high-toughness electric power pylon angle steel, it includes the following steps：
(a) pneumatic steelmaking is carried out as raw material using molten iron and steel scrap and obtains molten steel；The tapping temperature of the molten steel be 1620~
1670 DEG C, calcium carbide 0.5kg, aluminium block 1kg, lime 3kg, refining slag 6kg, Gao Meng is added when the molten steel is tapped into molten steel per ton
Steel 12kg, high chrome 30kg and low nitrogen carburant 5kg, and control C in the molten steel mass percentage content be 0.13~
0.16%, the mass percentage content of P is 0.001~0.020% and the mass percentage content of S is 0.005~0.030%；
(b) LF refining is carried out to the molten steel, the LF refining includes making white slag using auxiliary material to carry out deoxidation to molten steel
It is adjusted with adduction gold, lime 2kg, silicon carbide 1.5kg, ferrochrome 60kg and aluminum steel 1kg is added in molten steel per ton；The molten steel enters LF
Stove arrives at a station 1480~1550 DEG C of temperature, 1540~1580 DEG C, 50~70min of refining time of out-station temperature, the white slag retention time 15
~50min；
(c) continuous casting is carried out to molten steel obtained by step (b) and obtains strand, the degree of superheat of the continuous casting is 15~40 DEG C；
(d) strand is subjected to roll forming, the start rolling temperature of roll forming is 1200 DEG C, and finishing temperature is
880 DEG C, rolling pass is 10 passages, compression ratio 9；The low-temperature high-toughness electric power pylon angle steel finally obtained includes following matter
Measure the chemical composition of percentage：C：0.13%, Si：0.25%, Mn：1.4%, P：0.015%, S：0.001%, V：0.05%,
Al：0.015%, surplus is Fe and inevitable impurity.
Embodiment 2
The present embodiment provides a kind of production method of low-temperature high-toughness electric power pylon angle steel, it and the base in embodiment 1
This is consistent, unlike：In step (d), the start rolling temperature of roll forming is 1200 DEG C, and finishing temperature is 880 DEG C, rolling pass
For 12 passages, compression ratio 16.
Embodiment 3
The present embodiment provides a kind of production method of low-temperature high-toughness electric power pylon angle steel, it and the base in embodiment 1
This is consistent, unlike：In step (d), the start rolling temperature of roll forming is 1100 DEG C, and finishing temperature is 860 DEG C, rolling pass
For 12 passages, compression ratio 10.
Comparative example 1
This example provides a kind of production method of angle steel, it with it is almost the same in embodiment 1, unlike, step (d)
In, the start rolling temperature of roll forming is 1200 DEG C, and finishing temperature is 950 DEG C, and rolling pass is 10 passages, compression ratio 10.
The angle steel produced in embodiment 1-3, comparative example 1 is subjected to quantitative measurement, the results are shown in table 1.
The physical property table of angle steel in 1 embodiment 1-3 of table, comparative example 1
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by spirit, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of production method of low-temperature high-toughness electric power pylon angle steel, the low-temperature high-toughness electric power pylon include with angle steel
The chemical composition of following mass percent：C：0.13~0.16%, Si：0.25~0.40%, Mn：1.4~1.8%, P：≤
0.019%, S：≤ 0.001%, V：0.05~0.08%, Al：>=0.015%, surplus is Fe and inevitable impurity, spy
Sign is that it includes the following steps：
(a) pneumatic steelmaking is carried out as raw material using molten iron and steel scrap and obtains molten steel；The tapping temperature of the molten steel is 1620~1670 DEG C,
0.3~0.8kg of calcium carbide, 0.5~2kg of aluminium block, 2~5kg of lime, refining slag 5 are added into molten steel per ton when the molten steel tapping
~10kg, 3~8kg of 10~15kg of potassium steel, 25~35kg of high chrome and low nitrogen carburant, and control the matter of C in the molten steel
Amount degree is 0.13~0.16%, the mass percentage content of P is 0.001~0.020% and the mass percent of S contains
Amount is 0.005~0.030%；
(b) LF refining is carried out to the molten steel, the LF refining includes making white slag using auxiliary material to carry out deoxidation to molten steel and add
Alloy adjusts, and 1~3kg of molten steel addition lime per ton, 0.5~2.0kg of silicon carbide, 50~80kg of ferrochrome steel and aluminum steel 0.8~
1.5kg；The molten steel enters LF stoves and arrives at a station 1480~1550 DEG C of temperature, 1540~1580 DEG C of out-station temperature, and refining time 50~
70min, 15~50min of white slag retention time；
(c) continuous casting is carried out to molten steel obtained by step (b) and obtains strand, the degree of superheat of the continuous casting is 15~40 DEG C；
(d) strand is subjected to roll forming, the start rolling temperature of the roll forming is 1000~1200 DEG C, finish to gauge temperature
Degree is 850~880 DEG C, and rolling pass is 10~12 passages, and compression ratio is 8.3~20.
2. the production method of low-temperature high-toughness electric power pylon angle steel according to claim 1, it is characterised in that：Step (a)
In, calcium carbide 0.5kg, aluminium block 1kg, lime 3kg, refining slag 6kg, potassium steel 12kg, high chrome 30kg are added into molten steel per ton
With low nitrogen carburant 5kg.
3. the production method of low-temperature high-toughness electric power pylon angle steel according to claim 1, it is characterised in that：Step (b)
In, lime 2kg, silicon carbide 1.5kg, ferrochrome 60kg and aluminum steel 1kg is added in molten steel per ton.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810475618.1A CN108517467A (en) | 2018-05-17 | 2018-05-17 | A kind of production method of low-temperature high-toughness electric power pylon angle steel |
| PCT/CN2018/120497 WO2019218653A1 (en) | 2018-05-17 | 2018-12-12 | Method for producing angle steel for use in low-temperature high-toughness steel pylon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810475618.1A CN108517467A (en) | 2018-05-17 | 2018-05-17 | A kind of production method of low-temperature high-toughness electric power pylon angle steel |
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| CN108517467A true CN108517467A (en) | 2018-09-11 |
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| WO (1) | WO2019218653A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019218653A1 (en) * | 2018-05-17 | 2019-11-21 | 常熟市龙腾特种钢有限公司 | Method for producing angle steel for use in low-temperature high-toughness steel pylon |
| CN112011737A (en) * | 2020-08-18 | 2020-12-01 | 马鞍山钢铁股份有限公司 | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof |
| CN113862552A (en) * | 2021-09-10 | 2021-12-31 | 首钢长治钢铁有限公司 | Steel wire rod for welding and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680673A (en) * | 2020-11-13 | 2021-04-20 | 河钢股份有限公司 | Fe-Mn-C-Al series steel for automobile and preparation method thereof |
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- 2018-05-17 CN CN201810475618.1A patent/CN108517467A/en active Pending
- 2018-12-12 WO PCT/CN2018/120497 patent/WO2019218653A1/en active Application Filing
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| CN105734418A (en) * | 2016-03-11 | 2016-07-06 | 宣化钢铁集团有限责任公司 | Low-temperature-resistant hot-rolled angle steel and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019218653A1 (en) * | 2018-05-17 | 2019-11-21 | 常熟市龙腾特种钢有限公司 | Method for producing angle steel for use in low-temperature high-toughness steel pylon |
| CN112011737A (en) * | 2020-08-18 | 2020-12-01 | 马鞍山钢铁股份有限公司 | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof |
| CN112011737B (en) * | 2020-08-18 | 2021-10-15 | 马鞍山钢铁股份有限公司 | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof |
| CN113862552A (en) * | 2021-09-10 | 2021-12-31 | 首钢长治钢铁有限公司 | Steel wire rod for welding and preparation method thereof |
| CN113862552B (en) * | 2021-09-10 | 2022-07-22 | 首钢长治钢铁有限公司 | Steel wire rod for welding and preparation method thereof |
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| WO2019218653A1 (en) | 2019-11-21 |
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Application publication date: 20180911 |