CN110055376A - A kind of preparation method of high-strength pipe pile PC rod iron wire rod - Google Patents
A kind of preparation method of high-strength pipe pile PC rod iron wire rod Download PDFInfo
- Publication number
- CN110055376A CN110055376A CN201910474369.9A CN201910474369A CN110055376A CN 110055376 A CN110055376 A CN 110055376A CN 201910474369 A CN201910474369 A CN 201910474369A CN 110055376 A CN110055376 A CN 110055376A
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- China
- Prior art keywords
- temperature
- wire rod
- preparation
- pipe pile
- iron wire
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of preparation method of high-strength pipe pile PC rod iron wire rod, mass percent carbon content 0.06-0.15%, the phosphorus content 0.011-0.020% of converter terminal molten steel, 1630-1650 DEG C of tapping temperature；1504-1581 DEG C of temperature in place of the refining of LF furnace, 1557-1605 DEG C of temperature of offing normal；Degree of superheat control is between 20-32 DEG C in continuous casting；Bringing-up section temperature: upper 1050-1200 DEG C of heating, heating is 980--1180 DEG C lower；1000-1200 DEG C in soaking, 980--1180 DEG C under soaking, keep steel billet poker temperature uniform, for start rolling temperature in the range of 960 DEG C-1000 DEG C, wire rod laying temperature is 900-950 DEG C.The present invention is generated under the premise of not changing process route using the crackle that the heating process of design, rolling mill practice avoid finished product wire rod.
Description
Technical field
The present invention relates to metal material field, especially a kind of preparation method of high-strength pipe pile PC rod iron wire rod.
Background technique
Although traditional 30MnSi avoids it from being easy delayed fracture as far as possible by fining production control, low by its intensity
Influence, gradually replaced by high-intensitive 30Si2Mn, which is a kind of to have higher-strength, toughness and shock resistance
Middle low-carbon alloy steel, gren rod through pulling enhancing and modulation heat treatment after be mainly used in production harbour pipe of concrete
Stake, tall building foundation concrete tubular pile etc..
Since 30Si2Mn belongs to high silicon steel, the thermal conductivity of silicon is poor, conducts heat in steel bad, therefore quickly heating or chilling
Steel billet easily is cracked, is especially produced in severe winter, is easier to crack, therefore the production gets up to have certain hardly possible
Degree.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of preparations of high-strength pipe pile PC rod iron wire rod
Method, this method is reliable and stable, easy to operate, low in cost, and submersed nozzle inner wall temperature can be improved, and reduces inner wall folder
Sundries absorption further mitigates wadding steel incidence, reduces production cost.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of preparation method of high-strength pipe pile PC rod iron wire rod, comprising:
S1, converter producing
To guarantee product quality and for refined molten steel ingredient, for the requirement of converter molten iron: phosphorus content is less than by weight percent
Equal to 0.12%, sulfur content is less than or equal to 0.05%；The slag making auxiliary materials such as lime, dolomite are added in converter steelmaking process, out
It is required that ferrosilicon, silicomanganese and aluminium silicomanganese progress deoxidation alloying is added according to finished product 30Si2Mn composition of steel during steel；
The carbon content of converter terminal molten steel, phosphorus content and tapping temperature are as follows:
1630-1650 DEG C of tapping temperature；Carbon content 0.06-0.15%；Phosphorus content 0.011-0.020%；
The production of S2, LF furnace
1504-1581 DEG C of temperature in place of the refining of LF furnace；Refining is offed normal 1557-1605 DEG C of temperature,；Refining treatment time 30-
56min；
S3, continuous casting
Degree of superheat control is between 20-32 DEG C in continuous casting, and pulling rate is between 2m/min-2.2m/min；
S4, high speed wire rolling
Heating time is greater than 2 hours steel billet in heating furnace, bringing-up section temperature: upper 1050-1200 DEG C of heating, under heating
980--1180 DEG C, guarantee that the bringing-up section time is no less than 1 hour；1000-1200 DEG C in soaking, 980--1180 DEG C under soaking, protect
The card soaking zone time is no less than 1 hour, keeps steel billet poker temperature uniform；
For steel billet start rolling temperature at 960 DEG C -1000 DEG C, wire rod laying temperature is 900--950 DEG C.
Further, tapping temperature is 1638 DEG C in the S1.
Further, carbon content is 0.11% in the S1.
Further, phosphorus content is 0.16% in the S1.
Further, it is 1519 DEG C that LF furnace, which refines temperature in place, in the S2, and refining temperature of offing normal is 1564 DEG C.
Further, the refining treatment time is 40min in the S2.
Further, stelmo line insulation cover and blower are turned off in the S4.
Compared with prior art, advantageous effects of the invention:
The present invention finds out production under the premise of not changing process route, using the heating process and rolling mill practice of design
Technique avoids the generation of the crack defect of finished product wire rod by most economical and the simplest method.
Specific embodiment
Commerical test production technology is summarized as follows:
Converter smelting-(LF) ladle furnace refining-continuous small-billet casting (150mm × 150mm)-high speed wire rolling.
THE INDUSTRIAL TRIAL 10 furnace steel, specific process parameter control are as follows:
1) converter producing
It is added lime 4000-5000kg when converter smelting according to the actual situation, dolomite 800-1200kg, in tapping process
Ferrosilicon 2000kg, silicomangan 1000kg, aluminium silicomanganese 200kg is added.
The carbon content of converter terminal molten steel, phosphorus content (mass percent) and tapping temperature are as shown in table 1.
The ingredient and temperature of 1 converter tapping of table
2) LF furnace produces
The refining of LF furnace carries out plus auxiliary material slag making according to molten steel composition and temperature change, and adduction gold is finely adjusted and heats up behaviour
Make.Be added lime 400-500kg, fluorite 200kg, alumina 150-200kg, calcium carbide 50kg, alloy according to refine ingredient in place into
Row fine tuning manganese iron 300-500kg, ferrosilicon 300-500kg, feed silicon-calcium wire 150m.
Table 2 refines the control of LF furnace temperature
3) continuous casting
In continuous casting the degree of superheat control between 20-32 DEG C, pulling rate between 2m/min-2.2m/min, molten steel at
Divide (mass percent) control as shown in table 3.
3 finished product ingredient (%) of table
4) Rolling production
Heating time is greater than 2 hours steel billet in heating furnace, bringing-up section temperature: upper 1050-1200 DEG C of heating, under heating
980--1180 DEG C, guarantee that the bringing-up section time is no less than 1 hour；1000-1200 DEG C in soaking, 980--1180 DEG C under soaking, protect
The card soaking zone time is no less than 1 hour, keeps steel billet poker temperature uniform.Steel billet start rolling temperature steel billet start rolling temperature 960 DEG C-
In the range of 1000 DEG C, cool controlled rolling is carried out to wire rod, laying temperature is 900-950 DEG C, stelmo line insulation cover and blower
It is turned off.
5) service check
4 performance test results of table
By table 4 as it can be seen that 10 furnace steel mechanical properties of test fully meet the performance requirement of wire rod.
6) surface quality
The defects of not finding face crack fully meets the surface quality requirements of wire rod.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (7)
1. a kind of preparation method of high-strength pipe pile PC rod iron wire rod characterized by comprising
S1, converter producing
To guarantee product quality and for refined molten steel ingredient, for the requirement of converter molten iron: phosphorus content is less than or equal to by weight percent
0.12%, sulfur content is less than or equal to 0.05%；The slag making auxiliary materials such as lime, dolomite are added in converter steelmaking process, tapped
It is required that ferrosilicon, silicomanganese and aluminium silicomanganese progress deoxidation alloying is added according to finished product 30Si2Mn composition of steel in journey；
The carbon content of converter terminal molten steel, phosphorus content and tapping temperature are as follows:
1630-1650 DEG C of tapping temperature；Carbon content 0.06-0.15%；Phosphorus content 0.011-0.020%；
The production of S2, LF furnace
1504-1581 DEG C of temperature in place of the refining of LF furnace；Refining is offed normal 1557-1605 DEG C of temperature,；Refining treatment time 30-
56min；
S3, continuous casting
Degree of superheat control is between 20-32 DEG C in continuous casting, and pulling rate is between 2m/min-2.2m/min；
S4, high speed wire rolling
Heating time is greater than 2 hours steel billet in heating furnace, bringing-up section temperature: upper 1050-1200 DEG C of heating, heating lower 980--
1180 DEG C, guarantee that the bringing-up section time is no less than 1 hour；1000-1200 DEG C in soaking, 980--1180 DEG C under soaking, guarantee equal
The hot arc time is no less than 1 hour, keeps steel billet poker temperature uniform；
For steel billet start rolling temperature at 960 DEG C -1000 DEG C, wire rod laying temperature is 900--950 DEG C.
2. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 1, which is characterized in that go out in the S1
Steel temperature is 1638 DEG C.
3. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 1, which is characterized in that carbon in the S1
Content is 0.11%.
4. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 3, which is characterized in that phosphorus in the S1
Content is 0.16%.
5. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 1, which is characterized in that LF in the S2
It is 1519 DEG C that furnace, which refines temperature in place, and refining temperature of offing normal is 1564 DEG C.
6. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 1 or 5, which is characterized in that the S2
The middle refining treatment time is 40min.
7. the preparation method of high-strength pipe pile PC rod iron wire rod according to claim 1, which is characterized in that this in the S4
Tai Ermo line insulation cover and blower are turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474369.9A CN110055376A (en) | 2019-06-03 | 2019-06-03 | A kind of preparation method of high-strength pipe pile PC rod iron wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474369.9A CN110055376A (en) | 2019-06-03 | 2019-06-03 | A kind of preparation method of high-strength pipe pile PC rod iron wire rod |
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| CN110055376A true CN110055376A (en) | 2019-07-26 |
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| CN201910474369.9A Pending CN110055376A (en) | 2019-06-03 | 2019-06-03 | A kind of preparation method of high-strength pipe pile PC rod iron wire rod |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699309A (en) * | 2021-07-28 | 2021-11-26 | 邯郸钢铁集团有限责任公司 | Steelmaking method for improving fluidity of molten PC steel |
| CN114101368A (en) * | 2021-10-12 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Production method of high-silicon prestressed steel bar |
| CN114875203A (en) * | 2022-04-25 | 2022-08-09 | 盐城市联鑫钢铁有限公司 | Preparation method of 30MnSi steel billet |
| CN115338257A (en) * | 2022-08-22 | 2022-11-15 | 包头钢铁（集团）有限责任公司 | Production method of acid-washing-free SWRH82B |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102703804A (en) * | 2012-06-11 | 2012-10-03 | 首钢水城钢铁（集团）有限责任公司 | Production method of wire rod for high-strength prestressed steel bar |
| CN104526285A (en) * | 2014-12-23 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | High silicon manganese steel wire rod production method |
| CN105970082A (en) * | 2016-05-31 | 2016-09-28 | 内蒙古包钢钢联股份有限公司 | Production method of steel wire rod used for high-strength prestressed concrete steel bars |
-
2019
- 2019-06-03 CN CN201910474369.9A patent/CN110055376A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703804A (en) * | 2012-06-11 | 2012-10-03 | 首钢水城钢铁（集团）有限责任公司 | Production method of wire rod for high-strength prestressed steel bar |
| CN104526285A (en) * | 2014-12-23 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | High silicon manganese steel wire rod production method |
| CN105970082A (en) * | 2016-05-31 | 2016-09-28 | 内蒙古包钢钢联股份有限公司 | Production method of steel wire rod used for high-strength prestressed concrete steel bars |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699309A (en) * | 2021-07-28 | 2021-11-26 | 邯郸钢铁集团有限责任公司 | Steelmaking method for improving fluidity of molten PC steel |
| CN114101368A (en) * | 2021-10-12 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Production method of high-silicon prestressed steel bar |
| CN114875203A (en) * | 2022-04-25 | 2022-08-09 | 盐城市联鑫钢铁有限公司 | Preparation method of 30MnSi steel billet |
| CN115338257A (en) * | 2022-08-22 | 2022-11-15 | 包头钢铁（集团）有限责任公司 | Production method of acid-washing-free SWRH82B |
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Application publication date: 20190726 |