CN102717045B - Double-phase stainless steel continuous casting method - Google Patents
Double-phase stainless steel continuous casting method Download PDFInfo
- Publication number
- CN102717045B CN102717045B CN201210213497.6A CN201210213497A CN102717045B CN 102717045 B CN102717045 B CN 102717045B CN 201210213497 A CN201210213497 A CN 201210213497A CN 102717045 B CN102717045 B CN 102717045B
- Authority
- CN
- China
- Prior art keywords
- percent
- continuous casting
- equal
- less
- molten steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 23
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 17
- 239000010935 stainless steel Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000007670 refining Methods 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims 2
- 229910052786 argon Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 11
- 239000002893 slag Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000004512 die casting Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a double-phase stainless steel continuous casting method, which sequentially comprises the following steps that 1, through the temperature regulation and the fine adjustment through an LF (low frequency) refining furnace, the mass percentage of ingredients of molten steel reaches the following values that C is less or equal to 0.03 percent, Si is less than or equal to 1.00 percent, Mn is less than or equal to 6.00 percent, P is less than or equal to 0.040 percent, S is less than or equal to 0.030 percent, Cr is 21.00 to 26.00 percent, Ni is 1.35 to 8.00 percent, Mo is 0.10 to 5.00 percent, Cu is less than or equal to 0.80 percent, N is 0.100 to 0.320 percent, and the rest materials are Fe and unavoidable impurities, bottom blowing of Ar is carried out, the weak stirring is carried out for 10 to 15minutes, and the still standing is carried out for 18 to 25 minutes after the refining completion; 2, large ladles of molten steel are cast into middle ladles, the overheat degree is 20 to 45 DEG C, the insertion depth of a soaking water opening is 100 to 145mm, the pulling speed is 0.75 to 1.15 minutes, the specific water quantity is 0.30 to 0.32 L/Kg, crystallizer protection slag is added, the alkalinity is 0.85 to 0.95 percent, the melting point is 1090 to 1110 DEG C, and the viscosity is 1.5 to 1.7dpa.s; and 3, continuous blanks with the cross sections being 325 to 710 cm<2> are formed through continuous casting, and the crystallizer electromagnetic stirring is adopted. The double-phase stainless steel continuous casting method has the advantage that the defects of under-surface bubbles, surface cracks and shrinkage holes of the continuous casting blanks are overcome.
Description
Technical field
The present invention relates to a kind of method of two phase stainless steel continuous casting.
Background technology
Two phase stainless steel has the advantage of austenitic stainless steel and ferritic stainless steel concurrently, and intensity is high, corrosion resistance and good; The existence of 23% Cr and appropriate N content, two phase stainless steel has more the good good feature of resistance to spot corrosion, crevice corrosion and weldability, and is widely used in each fields such as oil, chemical industry, papermaking and bridge.
During two phase stainless steel continuous casting, easily produce rimhole, face crack, center porosity and shrinkage cavity defect, if with there being above-mentioned defect two phase stainless steel blank rolling pipe blank, not only blank surface palpus reconditioning, and also when poling, inside pipe wall there will be the defects such as crackle, pipe.Therefore with two phase stainless steel production diameter, be greater than 100mm pipe blank and conventionally adopt die casting, although die casting also produces such as center porosity and shrinkage cavity defect, by improving compression ratio, can improve steel ingot internal soundness, meet pipe need of production.
Chinese Patent Application No. 200910050544.8 open " a kind of production method that contains N two phase stainless steel continuous cast billet for the high chromium of pipe ", its square billet section≤160 * 160mm
2, belong to little square billet, and casting blank section is greater than 325cm
2square billet or circle base also unrealized continuous casting are produced.
Summary of the invention
For overcoming the defect of rimhole, face crack, center porosity and shrinkage cavity that existing two phase stainless steel produces when the continuous casting, the invention provides a kind of method of two phase stainless steel continuous casting, the method is produced casting blank section 325-710cm
2square billet or circle base, and without the defect of rimhole, face crack, center porosity and shrinkage cavity, surface quality can realize without reconditioning, compares with die casting, improves and rolls rear lumber recovery 12%-15%.
Technical conceive of the present invention is:
The first, after refining furnace temperature adjustment and fine setting composition, stir a little less than blowing Ar with steel ladle bottom blowing device, make molten steel component and temperature even, to unwrapping and water to certain calm time of molten steel greatly, field trash is fully floated afterwards;
The second, each parameters optimal combination and suitable soaking water gap insertion depth of the degree of superheat, pulling rate, specific water and M-EMS, can solve strand rimhole, face crack, center porosity and shrinkage cavity defect;
Three, crystallization control device covering slag basicity, fusing point, three important indicators of viscosity also contribute to improve cc billet surface quality.
The method of this two phase stainless steel continuous casting comprises following step successively:
iafter the temperature adjustment of LF refining furnace and fine setting composition, the mass percent of the composition of molten steel reaches:
C≤0.03； Si≤1.00； Mn≤6.00； P≤0.040； S≤0.030；
Cr 21.00～26.00； Ni 1.35～8.00； Mo 0.10～5.00； Cu≤0.80；
N 0.100～0.320; All the other are Fe and inevitable impurity.
Ladle bottom blowing Ar, intensity 1.5～2.5L/min.t, weak stirring 10～15min(temperature drop is by 0.5～1.5 ℃ of calculating); Refining finishes to water the calm time 18～25min of molten steel to unwrapping greatly.
iIthe molten steel wrapping is greatly watered to tundish, 20～45 ℃ of the degrees of superheat; Soaking water gap insertion depth 100～145mm; Pulling rate 0.75～1.15min; Specific water 0.30～0.32L/Kg; Add crystallizer protecting residue: basicity 0.85～0.95,1090～1110 ℃ of fusing points, viscosity (1300 ℃) 1.5～1.7dpa.s.
iIIcontinuous casting becomes section 325-710cm
2continuous casting billet, use M-EMS, current strength 500～700A, frequency 4～5Hz.
The present invention produces section 325～710cm
2square billet or circle base are without rimhole, face crack, center porosity and shrinkage cavity defect, and surface quality can realize without reconditioning, compares with die casting, improves and rolls rear lumber recovery 12%-15%.
The specific embodiment
Below in conjunction with embodiment, describe the specific embodiment of the method for this two phase stainless steel continuous casting in detail, but the specific embodiment of the present invention is not limited to following embodiment.
embodiment mono-
The present embodiment carries out on diameter 300mm tetra-stream round billet continuous casting machines, steel grade 022Cr22Ni5Mo3N, and 1460 ℃ of liquidus curves, chemical composition of the finished product mass percent:
C≤0.03； Si≤1.00； Mn≤2.00； P≤0.030； S≤0.020；
Cr 21.00～23.00； Ni 4.50～6.50； Mo 2.50～3.50；
Cu≤0.10; N 0.100～0.200; All the other are Fe and inevitable impurity.
The present embodiment comprises following step successively:
iafter the temperature adjustment of LF refining furnace and fine setting composition, the mass percent of molten steel component:
C 0.013； Si 0.43； Mn 1.21； P 0.020； S 0.001；
Cr 22.31； Ni 5.38； Mo 3.23； N 0.159； Cu 0.01；
All the other are Fe and inevitable impurity.
Molten steel weight 85t, 1545 ℃ of temperature, feed calcium line 220m, ladle bottom blowing Ar, intensity 2.35L/min.t, weak stirring 13min, 1535 ℃ of out-station temperatures, refining finishes to water the calm time 20min of molten steel to unwrapping greatly.
iImolten steel in wrapping is greatly watered to tundish, in surveying during the middle liquid 8t of Baogang, wrap 1508 ℃ of temperature; During the middle liquid 12t of Baogang, four streams are opened and are watered successively, add crystallizer protecting residue: basicity 0.89,1100 ℃ of fusing points, viscosity (1300 ℃) 1.6dpa.s; Starting pulling rate 0.5m/min, after 1min, pulling rate rises to 0.75min, specific water 0.301L/Kg; Covering agent 160Kg in adding during 15t; Soaking water gap inserts molten steel degree of depth 140mm;
iIIcontinuous casting becomes the continuous casting billet of diameter 300mm; Strand goes out crystallizer 2m, opens M-EMS (revolving-field type, current strength 600A, frequency 4.5Hz); In 15min, wrap 1498 ℃ of thermometrics, pulling rate 0.80m/min, specific water 0.302L/Kg; In 25min, wrap 1495 ℃ of thermometrics, pulling rate 0.85m/min, specific water 0.305L/Kg; In 35min, wrap 1493 ℃ of thermometrics, pulling rate 0.90m/min, specific water 0.308L/Kg.
Large bag has watered, and when middle Baogang liquid level is down to 260mm, pulling rate is down to 0.5m/min, the operation of binding.
The round base of producing is without rimhole, face crack, center porosity and shrinkage cavity defect, and surface quality can realize without reconditioning.
embodiment bis-
The present embodiment is at 220 * 220mm
2on four stream billet casters, carry out, steel grade S32750,1450 ℃ of liquidus curves, chemical composition of the finished product mass percent:
C≤0.03； Si≤0.80；Mn≤1.20；P≤0.035；S≤0.020； Cr 24.00-26.00；
Ni 6.00-8.00； Mo 3.00-5.00； N 0.240-0.320； Cu≤0.30；
All the other are Fe and inevitable impurity.
The present embodiment comprises following step successively:
iafter the temperature adjustment of LF refining furnace and fine setting composition, the mass percent of molten steel component:
C 0.015； Si 0.45； Mn 0.60； P 0.015； S 0.015； Cr 24.83；
Ni 7.27; Mo 4.08; N 0.290; Cu 0.01; All the other are Fe and inevitable impurity.
Molten steel weight 83t, 1539 ℃ of temperature, feed calcium line 210m, ladle bottom blowing Ar, intensity 2.29L/min.t, weak stirring 10min, 1530 ℃ of out-station temperatures, refining finishes to water calm times 19 min of molten steel to unwrapping greatly;
iImolten steel in wrapping is greatly watered to tundish, in surveying during the middle liquid 8t of Baogang, wrap 1497 ℃ of temperature; During the middle liquid 12t of Baogang, four streams are opened and are watered successively, add crystallizer protecting residue (basicity 0.89,1100 ℃ of fusing points, viscosity (1300 ℃) 1.6dpa.s); Starting pulling rate 0.5m/min, after 1min, pulling rate rises to 0.85min, specific water 0.301L/Kg; Covering agent 160Kg in adding during 15t; Soaking water gap inserts molten steel degree of depth 130mm;
iIIcontinuous casting becomes 220 * 220mm
2continuous casting billet, strand goes out crystallizer 2m, opens M-EMS (revolving-field type, current strength 550A, frequency 4.5Hz); In 15min, wrap 1481 ℃ of thermometrics, pulling rate 0.90m/min, specific water 0.301L/Kg; In 25min, wrap 1490 ℃ of thermometrics, pulling rate 0.95m/min, specific water 0.302L/Kg; In 35min, wrap 1482 ℃ of thermometrics, pulling rate 1.05m/min, specific water 0.303L/Kg.
Large bag has watered, and when middle Baogang liquid level is down to 200mm, pulling rate is down to 0.5m/min, the operation of binding.
The round base of producing is without rimhole, face crack, center porosity and shrinkage cavity defect, and surface quality can realize without reconditioning.
Claims (1)
1. a method for two phase stainless steel continuous casting, it comprises following step successively:
iafter the temperature adjustment of LF refining furnace and fine setting composition, the mass percent of the composition of molten steel reaches:
C≤0.03； Si≤1.00； Mn≤6.00； P≤0.040； S≤0.030；
Cr 21.00～26.00； Ni 1.35～8.00； Mo 0.10～5.00； Cu≤0.80；
N 0.100～0.320; All the other are Fe and inevitable impurity;
Ladle bottom blowing Ar, intensity steel per minute per ton is blown into argon gas 1.5-2.5L, weak stirring 10～15min; Refining finishes to water the calm time 18～25min of molten steel to unwrapping greatly;
iIthe molten steel wrapping is greatly watered to tundish, 20～45 ℃ of the degrees of superheat; Soaking water gap insertion depth 100～145mm; Pulling rate 0.75～1.15min; Specific water 0.30～0.32L/Kg; Add crystallizer protecting residue: basicity 0.85～0.95,1090～1110 ℃ of fusing points, viscosity 1.5～1.7dpa.s;
iIIcontinuous casting becomes section 325-710cm
2continuous casting billet, use M-EMS, current strength 500～700A, frequency 4～5Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213497.6A CN102717045B (en) | 2012-06-27 | 2012-06-27 | Double-phase stainless steel continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210213497.6A CN102717045B (en) | 2012-06-27 | 2012-06-27 | Double-phase stainless steel continuous casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102717045A CN102717045A (en) | 2012-10-10 |
| CN102717045B true CN102717045B (en) | 2014-04-16 |
Family
ID=46942989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210213497.6A Active CN102717045B (en) | 2012-06-27 | 2012-06-27 | Double-phase stainless steel continuous casting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102717045B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018761B (en) * | 2015-07-28 | 2017-01-11 | 山西太钢不锈钢股份有限公司 | Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel |
| CN106521355B (en) * | 2016-11-25 | 2019-04-12 | 四川六合锻造股份有限公司 | A kind of two phase stainless steel and its preparation method and application |
| CN106591735B (en) * | 2016-12-05 | 2019-04-12 | 四川六合锻造股份有限公司 | A kind of super-duplex stainless steel and preparation method thereof |
| CN109014095B (en) * | 2017-06-12 | 2020-07-17 | 鞍钢股份有限公司 | Method for reducing casting blank bubble defects of Cr-containing steel type of plate blank |
| CN108486480B (en) * | 2018-06-07 | 2019-12-27 | 东北大学 | Manufacturing method of thin-specification hot-rolled dual-phase steel plate |
| CN109898015A (en) * | 2019-02-01 | 2019-06-18 | 上海加宁新材料科技有限公司 | The manufacturing method of naval vessel seawater corrosion resistance HDR two phase stainless steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403077A (en) * | 2008-11-08 | 2009-04-08 | 山西太钢不锈钢股份有限公司 | Biphase stainless steel and method for making same |
| CN101468387A (en) * | 2007-12-27 | 2009-07-01 | 攀钢集团攀枝花钢铁研究院 | Continuous casting mould fluxes and preparation method thereof |
| CN101812647A (en) * | 2009-02-25 | 2010-08-25 | 宝山钢铁股份有限公司 | Diphase stainless steel and manufacturing method thereof |
| CN101876024A (en) * | 2009-04-30 | 2010-11-03 | 宝山钢铁股份有限公司 | Production method for high-chrome continuous cast billet containing N duplex stainless steel of pipe blank |
| CN101967610A (en) * | 2009-07-28 | 2011-02-09 | 宝山钢铁股份有限公司 | High carbon high silicon martensite stainless steel billet and preparation method thereof |
| JP5237604B2 (en) * | 2007-09-27 | 2013-07-17 | メキキ・クリエイツ株式会社 | Insured person intention record transmission apparatus, insured person intention record transmission method, and insured person intention record transmission program |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2527105B2 (en) * | 1992-11-12 | 1996-08-21 | 日本鋼管株式会社 | Method for manufacturing thin plate duplex stainless steel slab |
-
2012
- 2012-06-27 CN CN201210213497.6A patent/CN102717045B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5237604B2 (en) * | 2007-09-27 | 2013-07-17 | メキキ・クリエイツ株式会社 | Insured person intention record transmission apparatus, insured person intention record transmission method, and insured person intention record transmission program |
| CN101468387A (en) * | 2007-12-27 | 2009-07-01 | 攀钢集团攀枝花钢铁研究院 | Continuous casting mould fluxes and preparation method thereof |
| CN101403077A (en) * | 2008-11-08 | 2009-04-08 | 山西太钢不锈钢股份有限公司 | Biphase stainless steel and method for making same |
| CN101812647A (en) * | 2009-02-25 | 2010-08-25 | 宝山钢铁股份有限公司 | Diphase stainless steel and manufacturing method thereof |
| CN101876024A (en) * | 2009-04-30 | 2010-11-03 | 宝山钢铁股份有限公司 | Production method for high-chrome continuous cast billet containing N duplex stainless steel of pipe blank |
| CN101967610A (en) * | 2009-07-28 | 2011-02-09 | 宝山钢铁股份有限公司 | High carbon high silicon martensite stainless steel billet and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102717045A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102717045B (en) | Double-phase stainless steel continuous casting method | |
| CN102796963B (en) | Martensitic stainless steel rectangular billet continuous casting method | |
| CN102211160B (en) | Continuous casting method of sulfur-containing easy-cutting pinion steel | |
| CN105018761B (en) | Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel | |
| CN104862443B (en) | A kind of smelting process of low carbon low silicon welding wire steel | |
| CN102409236B (en) | Method for producing super-thick steel plate | |
| CN104498805B (en) | Production method of high-carbon low-nitrogen steel for strand wires | |
| CN100354562C (en) | High alloy steel seamless steel pipe and production method thereof | |
| CN103233162B (en) | Process for producing IF steel by using medium sheet billet in continuous casting manner | |
| CN102218516B (en) | Continuous casting method of high chrome steel | |
| CN108823492B (en) | Method for producing high-alloy high-strength peritectic steel by CSP (cast steel plate) thin plate continuous casting machine | |
| CN110340315B (en) | Method for continuously casting martensitic stainless steel by using large-section rectangular billet | |
| CN104278197A (en) | Smelting method of steel for low-silicon high-titanium welding wire | |
| CN102816979A (en) | Production method of low-carbon sulfur series free-cutting steel continuous casting billet | |
| CN105458205B (en) | The production method of high nickel steel Gr.8 continuous cast round billets | |
| CN106834947B (en) | A kind of C grades of angle steel continuous casting process of big aligning strain | |
| CN111254361B (en) | Production method of Q1100D/E extra-thin steel plate for high-strength structure | |
| CN105537549B (en) | The production method of 100 DEG C of low temperature seamless steel pipe steel continuous cast round billets | |
| CN108570532A (en) | A method of improving directly upper steel grade quality and stopper rod flow control time | |
| CN105200189A (en) | Method for controlling corner cracks of boron micro-alloy steel continuous-casting billet | |
| CN105316558A (en) | Preparation method of boron-containing steel preventing casting blank corner cracking | |
| CN105108098A (en) | Technology for centrifugal casting of high-nitrogen austenitic stainless steel pipe at normal pressure | |
| CN104070149B (en) | A kind of production method of small square billet continuous casting bearing steel | |
| CN103469102A (en) | Steel HG785D for tower crane and production method | |
| CN104263882B (en) | A kind of method of steel for container purified treatment without calcium in steel-making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240312 Address after: 030003 2 tipped lawn street, pointed lawn area, Taiyuan, Shanxi Patentee after: Shanxi Taigang Stainless Steel Co.,Ltd. Country or region after: China Patentee after: Guoneng Shendong Coal Group Co.,Ltd. Country or region after: China Address before: 030003 No. 2 lawn street, Taiyuan, Shanxi Patentee before: Shanxi Taigang Stainless Steel Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |