CN108823492A - A kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel - Google Patents
A kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel Download PDFInfo
- Publication number
- CN108823492A CN108823492A CN201810623231.6A CN201810623231A CN108823492A CN 108823492 A CN108823492 A CN 108823492A CN 201810623231 A CN201810623231 A CN 201810623231A CN 108823492 A CN108823492 A CN 108823492A
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- thin sheet
- sheet continuous
- steel
- water
- 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.)
- Granted
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Abstract
The invention discloses a kind of methods of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel, including following process：Qualified molten steel → installation air curtain barricade wall tundish protective casting → funnel type thin sheet continuous casting crystallizer that molten iron pre-desulfurization → decarburization dephosphorization converter → LF external refining is handled secondary cooling → bending aligning → mechanical pendulum shearing → high alloy high intensity peritectic steel slab that once cooling → automatic distribution water controls；The present invention realizes that water and water temperature cooperation reach weak cold using high crystallization rate covering slag, crystallizer; it is effectively controlled the generation of the larger green shell surface indentation of crystallizer internal cause peritectoid characteristic linear shrinkage and crackle, the high frequency small amplitude techniques effective solution problem of surface vibration depth；The smooth casting of high alloy high intensity peritectic steel and quality stability contorting under the high pulling rate of CSP thin sheet continuous casting are realized, compared with prior art, the control of surface defect of bloom rate is 0.5% hereinafter, having reached international most advanced level.
Description
Technical field
The invention belongs to Sheet-bar Continuous Casting Technique fields, and in particular to a kind of CSP thin sheet continuous casting machine production high alloy is high-strength
Spend the method for peritectic steel.
Background technique
Presently, there are can not be successfully casting, table for peritectoid steel series, especially high alloy high intensity peritectic steel continuous casting
The technical problems such as face quality control are only produced in conventional plate blank, medium and thin slab continuous caster in world wide at present, and CSP thin plate
Billet continuous casting machine there is no the precedent successfully produced.It is high that existing disclosed peritectic steel production technology is unable to satisfy the casting of CSP thin sheet continuous casting
The requirement of the production of alloy high strength peritectic steel and quality control.
CSP thin sheet continuous casting because the feature that its pulling rate is high, steel -passing amount is big, slab is thin, the advantage of its own are low cost manufacturing,
But the problem for also bringing raw quality to control to the casting of high alloy high intensity peritectic steel simultaneously.Trace it to its cause for：（1）Carbon content
0.08%-0.12% range steel grade because peritectic reaction occurs in initial solidification process, this process along with biggish linear shrinkage,
It generates air gap between initial green shell and copper plate of crystallizer and thermal resistance is caused to increase, shell thickness is uneven and generates recess, is tying
The effect of thermally stressed in brilliant device, mechanical stress and generate longitudinal crack, gently then generate Surficial Vertical Crack of Continuous Cast defect, it is heavy then occur
Crackle bleed-out accident.（2）The alloying elements such as Nb, Ti, Mo, Cr, can effectively improve the intensity of steel, but also increase simultaneously thin
Small carbon, nitrogen and carbonitride are precipitated along austenite grain boundary, cause embrittlement of grain boundaries, exacerbate the generation of Longitudinal Surface Cracks；Such as
Fruit Spraying Water of Nozzles in Secondary Cooling is unreasonable, then aggravates Surficial Vertical Crack of Continuous Cast.How to solve the problems, such as Longitudinal Surface Cracks, guarantees the qualified company of production
Slab is technological difficulties place.
Summary of the invention
The object of the present invention is to provide a kind of methods of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel.
In order to meet above-mentioned purpose, the technical scheme adopted by the invention is as follows：
A kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel, including following process：Molten iron pre-desulfurization → de-
Qualified molten steel → installation air curtain barricade wall tundish protective casting → funnel that carbon dephosphorization converter → LF external refining is handled
Type thin sheet continuous casting crystallizer secondary cooling → bending aligning → mechanical pendulum shearing → height that once cooling → automatic distribution water controls
Alloy high strength peritectic steel slab.
Preferably, the weight percent for handling to obtain qualified molten steel by LF external refining is：C is 0.08-
0.13%, Si 0.4-0.5%, Mn 1.45-1.55%, S are that≤0.008%, P is that≤0.015, Nb 0.024-0.05%, Ti are
0.015-0.030%, Mo 0.20-0.25%, Cr 0.15-0.20%, remaining is Fe and microelement.
Preferably, the difference of molten steel liquidus curve and practical cast temperature is 20 ~ 23 DEG C in the casting process, the technique
Tundish Flow Field control device uses slag blocking wall in process, and twice dam, air curtain barricade wall, the air curtain barricade wall argon flow is
0.55 ~ 0.58Mpa promotes field trash and further removes, and prevents seam of the air between big packet collector nozzle and protection long nozzle
Gap, which enters, causes secondary oxidation of steel, is cast in the casting process using high MgO and low Si coverture double shielding, big packet length
Mouth of a river argon gas-sealed flow is 8.35 ~ 8.64Nm3/ h, the weight percent of MgO is 82.3% in used coverture, is used
The weight percent of Si is 2.38 ~ 3.11% in coverture.
Preferably, funnel type thin sheet continuous casting crystallizer cooling water flow is 6000L/min-6300L/min, and inflow temperature is
39.5 DEG C -40.5 DEG C, funnel type thin sheet continuous casting crystallizer copper plate thickness >=22mm, hot-fluid than stability contorting between 75%-85%,
Funnel type thin sheet continuous casting liquid level fluctuation of crystallizer is pulling rate 4.0-4.3m/min within ± 3.2mm.
Preferably, total specific water is that 2.72-3.22 rises water/kilogram steel, institute in the secondary cooling of the automatic distribution water control
The secondary cooling for stating automatic distribution water control is divided into four sections, in described each section specific water's distribution be respectively under crystallizer mouth under one section
Mouthful be 1.57-1.71 rise water/kilogram steel, two sections for 0.69-0.82 rise water/kilogram steel, three sections for 0.28-0.40 rise water/kilogram
Steel, four sections rise water/kilogram steel for 0.19-0.30.
Preferably, bending position temperature is 980 DEG C -1040 DEG C.
Preferably, during the funnel type thin sheet continuous casting crystallizer once cools down, protection slag melting point needed for continuous casting is 1060-
1110 DEG C, viscosity 0.07-0.10Pa.s, basicity 1.03-1.15, melting speed is 25s.
Beneficial effects of the present invention are：
The present invention provides a kind of method of CSP thin sheet continuous casting casting high alloy high intensity peritectic steel, using high crystallization rate covering slag,
Crystallizer realizes that water and water temperature cooperation reach weak cold, is effectively controlled the larger green shell of crystallizer internal cause peritectoid characteristic linear shrinkage
The generation of surface indentation and crackle, the high frequency small amplitude techniques effective solution problem of surface vibration depth；It is reasonable secondary
Cooling specific water is distributed so that stress is more uniform, slows down the carbon, nitrogen and Carbonitride Precipitation of alloying element；It realizes
The smooth casting of high alloy high intensity peritectic steel and quality stability contorting under the high pulling rate of CSP thin sheet continuous casting, compared with prior art,
The control of surface defect of bloom rate is 0.5% hereinafter, having reached international most advanced level.
Specific embodiment
The present invention is described in further details below with reference to embodiment.
Embodiment 1：
Specific Cast parameters and operating procedure are as follows：
1）Qualified molten steel composition is after desulfurizing iron, converter decarburization dephosphorization, LF external refining processing：C is that 0.088%, Si is
0.44%, Mn 1.50%, S 0.006%, P 0.014%, Nb 0.035%, Ti 0.020%, Mo 0.23%, Cr are
0.16%, remaining is Fe and microelement；
2）The tundish protective casting of air curtain barricade wall is installed, the control of casting process molten steel overheat is 20 DEG C, air curtain barricade wall argon gas
Flow control is 0.55Mpa, and big packet long nozzle argon gas-sealed flow is 8.35Nm3/ h, used coverture MgO% content are
82.3%, silicone content 2.38%；
3）Funnel type thin sheet continuous casting crystallizer once cools down, and used protection basicity of slag is 1.10, and fusion temperature is 1070 DEG C,
1300 DEG C of viscosity are 0.08 Pa.s, and covering slag consumption is 0.39kg/t, and hot-fluid ratio is 78%；Funnel type thin sheet continuous casting crystallizer copper
Plate thickness is 23mm, and water is set as 6100L/min, and inflow temperature is 40.2 DEG C, and vibration frequency is 242 times/min, vibration row
Journey 6.1mm, the practical control of funnel type thin sheet continuous casting liquid level fluctuation of crystallizer is -2.76mm to+3.08mm, and casting speed control is
4.0m/min；
4）The secondary cooling of automatic distribution water control, the total specific water of Spraying Water of Nozzles in Secondary Cooling are 2.78 liters of water/kilogram steel, mouth under crystallizer
Under to one section mouth be 1.54 liters of water/kilogram steel, two sections be 0.71 liter of water/kilogram steel, three sections be 0.32 liter of water/kilogram steel, four sections
For 0.21 liter of water/kilogram steel；
5）Bending aligning, then mechanical pendulum shearing generate high alloy high intensity peritectic steel slab, and temperature control in bending position is
1023℃。
The high alloy high intensity peritectic steel slab surface crack incidence for using the Cast parameters of embodiment 1 to produce for
0.3%。
Embodiment 2
Specific Cast parameters and operating procedure are as follows：
1）Qualified molten steel composition is after desulfurizing iron, converter decarburization dephosphorization, LF external refining processing：C is that 0.126%, Si is
0.41%, Mn 1.48%, S 0.006%, P 0.012%, Nb 0.026%, Ti 0.024%, Mo 0.21%, Cr are
0.18%, remaining is Fe and microelement；
2）The tundish protective casting of air curtain barricade wall is installed, the control of casting process molten steel overheat is 23 DEG C, air curtain barricade wall argon gas
Flow control is 0.58Mpa, and big packet long nozzle argon gas-sealed flow is 8.64Nm3/ h, used coverture MgO% content are
82.3%, silicone content 3.11%；
3）Funnel type thin sheet continuous casting crystallizer once cools down, and used protection basicity of slag is 1.11, and fusion temperature is 1060 DEG C,
1300 DEG C of viscosity are 0.09 Pa.s, and covering slag consumption is 0.41kg/t, and hot-fluid ratio is 81%；Funnel type thin sheet continuous casting crystallizer copper
Plate thickness is 23mm, and water is set as 6100L/min, and inflow temperature is 40.3 DEG C, and vibration frequency is 246 times/min, vibration row
Journey 6.1mm, the practical control of funnel type thin sheet continuous casting liquid level fluctuation of crystallizer is -2.74mm to+3.12mm, and casting speed control is
4.2m/min；
4）The secondary cooling of automatic distribution water control, the total specific water of Spraying Water of Nozzles in Secondary Cooling are 3.1 liters of water/kilogram steel, mouth under crystallizer
Under to one section mouth be 1.63 liters of water/kilogram steel, two sections be 0.77 liter of water/kilogram steel, three sections be 0.36 liter of water/kilogram steel, four sections
For 0.25 liter of water/kilogram steel；
5）Bending aligning, then mechanical pendulum shearing generate high alloy high intensity peritectic steel slab, and temperature control in bending position is
1028℃。
The high alloy high intensity peritectic steel slab surface crack incidence for using the Cast parameters of embodiment 2 to produce for
0.4%。
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although in conjunction with above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that：Still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (7)
1. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel, it is characterised in that：Including following process：
Qualified molten steel → installation air curtain barricade wall tundish that molten iron pre-desulfurization → decarburization dephosphorization converter → LF external refining is handled
Protective casting → funnel type thin sheet continuous casting crystallizer secondary cooling → bending aligning → machine that once cooling → automatic distribution water controls
Tool puts shearing → high alloy high intensity peritectic steel slab.
2. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 1, feature
It is：The weight percent for handling to obtain qualified molten steel by LF external refining is：C is 0.08-0.13%, Si 0.4-
0.5%, Mn 1.45-1.55%, S are that≤0.008%, P is≤0.015, Nb 0.024-0.05%, Ti 0.015-0.030%,
Mo is 0.20-0.25%, Cr 0.15-0.20%, remaining is Fe and microelement.
3. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 1 or 2,
It is characterized in that：The difference of molten steel liquidus curve and practical cast temperature is 20 ~ 23 DEG C in the casting process, in the process flow
Tundish Flow Field control device use slag blocking wall, twice dam, air curtain barricade wall, the air curtain barricade wall argon flow be 0.55 ~
0.58Mpa promotes field trash and further removes, and prevents gap of the air between big packet collector nozzle and protection long nozzle from entering
Secondary oxidation of steel is caused, is cast in the casting process using high MgO and low Si coverture double shielding, big packet long nozzle argon
Hermetic seal flow is 8.35 ~ 8.64Nm3/ h, the weight percent of MgO is 82.3% in used coverture, used coverture
The weight percent of middle Si is 2.38 ~ 3.11%.
4. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 3, feature
It is：Funnel type thin sheet continuous casting crystallizer cooling water flow be 6000L/min-6300L/min, inflow temperature be 39.5 DEG C-
40.5 DEG C, funnel type thin sheet continuous casting crystallizer copper plate thickness >=22mm, hot-fluid than stability contorting between 75%-85%, funnel type
Thin sheet continuous casting liquid level fluctuation of crystallizer is pulling rate 4.0-4.3m/min within ± 3.2mm.
5. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 1 or 4,
It is characterized in that：Total specific water is that 2.72-3.22 rises water/kilogram steel in the secondary cooling of the automatic distribution water control, described automatic
Secondary cooling with water management is divided into four sections, and mouth to mouth under one section is under specific water's distribution respectively crystallizer in described each section
1.57-1.71 rise water/kilogram steel, two sections for 0.69-0.82 rise water/kilogram steel, three sections for 0.28-0.40 rise water/kilogram steel, four
Section is that 0.19-0.30 rises water/kilogram steel.
6. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 5, feature
It is：Bending position temperature is 980 DEG C -1040 DEG C.
7. a kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel according to claim 1 or 6,
It is characterized in that：During the funnel type thin sheet continuous casting crystallizer once cools down, protection slag melting point needed for continuous casting is 1060-1110
DEG C, viscosity 0.07-0.10Pa.s, basicity 1.03-1.15, melt speed be 25s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810623231.6A CN108823492B (en) | 2018-06-15 | 2018-06-15 | Method for producing high-alloy high-strength peritectic steel by CSP (cast steel plate) thin plate continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810623231.6A CN108823492B (en) | 2018-06-15 | 2018-06-15 | Method for producing high-alloy high-strength peritectic steel by CSP (cast steel plate) thin plate continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108823492A true CN108823492A (en) | 2018-11-16 |
| CN108823492B CN108823492B (en) | 2020-07-03 |
Family
ID=64141429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810623231.6A Active CN108823492B (en) | 2018-06-15 | 2018-06-15 | Method for producing high-alloy high-strength peritectic steel by CSP (cast steel plate) thin plate continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108823492B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961592A (en) * | 2019-12-16 | 2020-04-07 | 唐山钢铁集团有限责任公司 | Method for controlling bleed-out in continuous casting of high-casting-speed sheet billet |
| CN111774546A (en) * | 2020-06-17 | 2020-10-16 | 北京科技大学 | Method for improving peritectic steel continuous casting medium plate blank center segregation and surface cracks |
| CN112475254A (en) * | 2020-10-28 | 2021-03-12 | 东北大学 | Method and device for controlling pulling speed and casting strip thickness of thin strip continuous casting machine |
| CN113102714A (en) * | 2020-07-30 | 2021-07-13 | 北京科技大学 | Continuous casting cooling method for controlling peritectic steel slab corner cracks |
| US11192176B1 (en) | 2020-06-17 | 2021-12-07 | University Of Science And Technology Beijing | Method for improving center segregation and surface crack of continuous casting medium thick slab of peritectic steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003171744A (en) * | 2001-12-03 | 2003-06-20 | Sumitomo Metal Ind Ltd | Chromium based stainless steel with double layer structure, and production method therefor |
| CN104789859A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Method for producing peritectic steel by using medium-thin slab continuous caster |
| CN105886924A (en) * | 2016-04-28 | 2016-08-24 | 山东钢铁股份有限公司 | Low-alloy steel high in strength and toughness performance and preparing method of low-alloy steel |
-
2018
- 2018-06-15 CN CN201810623231.6A patent/CN108823492B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003171744A (en) * | 2001-12-03 | 2003-06-20 | Sumitomo Metal Ind Ltd | Chromium based stainless steel with double layer structure, and production method therefor |
| CN104789859A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Method for producing peritectic steel by using medium-thin slab continuous caster |
| CN105886924A (en) * | 2016-04-28 | 2016-08-24 | 山东钢铁股份有限公司 | Low-alloy steel high in strength and toughness performance and preparing method of low-alloy steel |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961592A (en) * | 2019-12-16 | 2020-04-07 | 唐山钢铁集团有限责任公司 | Method for controlling bleed-out in continuous casting of high-casting-speed sheet billet |
| CN110961592B (en) * | 2019-12-16 | 2021-08-13 | 唐山钢铁集团有限责任公司 | Method for controlling bleed-out in continuous casting of high-casting-speed sheet billet |
| CN111774546A (en) * | 2020-06-17 | 2020-10-16 | 北京科技大学 | Method for improving peritectic steel continuous casting medium plate blank center segregation and surface cracks |
| US11192176B1 (en) | 2020-06-17 | 2021-12-07 | University Of Science And Technology Beijing | Method for improving center segregation and surface crack of continuous casting medium thick slab of peritectic steel |
| CN113102714A (en) * | 2020-07-30 | 2021-07-13 | 北京科技大学 | Continuous casting cooling method for controlling peritectic steel slab corner cracks |
| CN113102714B (en) * | 2020-07-30 | 2021-12-03 | 北京科技大学 | Continuous casting cooling method for controlling peritectic steel slab corner cracks |
| CN112475254A (en) * | 2020-10-28 | 2021-03-12 | 东北大学 | Method and device for controlling pulling speed and casting strip thickness of thin strip continuous casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108823492B (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108823492A (en) | A kind of method of CSP thin sheet continuous casting machine production high alloy high intensity peritectic steel | |
| CN103540844B (en) | Low temperature resistant H profile steel and production method thereof | |
| CN105018761B (en) | Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel | |
| CN102816979B (en) | Production method of low-carbon sulfur series free-cutting steel continuous casting billet | |
| CN104313491B (en) | The weathering steel hot rolled thin strip of a kind of segregation without P and manufacture method thereof | |
| CN102107215B (en) | Resource-saving boron-containing high-speed steel composite roll and preparation method thereof | |
| CN104561772B (en) | A kind of 130mm~150mm thickness ultralow temperature steel plate and its production method | |
| CN105441787B (en) | A kind of rope making production method of high-carbon steel gren rod | |
| CN104862443A (en) | Smelting method for low-carbon low-silicon wire-welding steel | |
| CN103252466A (en) | Continuous casting process for high-class high-quality chain steel | |
| CN106350631A (en) | Production method of armco iron for amorphous soft magnetic materials | |
| CN104278197B (en) | Smelting method of steel for low-silicon high-titanium welding wire | |
| CN103484766B (en) | A kind of 600MPa level hydroelectric project modified high strength and low welding crack sensitivity steel plate and preparation method thereof | |
| CN103667924B (en) | A kind of production method of 40Cr gren rod | |
| CN109402498B (en) | High-temperature carburized gear steel and manufacturing method thereof | |
| CN110117747A (en) | A kind of production method of high Al nitrided steel | |
| CN103882303A (en) | Smelting method for steel for gas protection welding wire | |
| CN104831167A (en) | Q550E high-strength steel hot rolled coil and production method thereof | |
| CN103433438A (en) | Method for controlling quality of bloom hypo-peritectic steel continuous casting billet | |
| CN105695860A (en) | Structural steel and production technology thereof | |
| CN105458200A (en) | Method for reducing surface cracks of boron containing steel continuous casting sheet billet | |
| JP2023519992A (en) | 355 MPa grade cold-resistant hot-rolled H-beam steel for marine engineering and its production method | |
| CN103611903A (en) | Continuous casting manufacturing process of ultra-thick slabs for hydropower station pressure vessel steel | |
| CN103469102A (en) | Steel HG785D for tower crane and production method | |
| CN103146995A (en) | High manganese steel continuous casting production technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |