CN109338045A - The technique that formula production electrical equipment metal material is added in nano particle RH vacuum chamber - Google Patents
The technique that formula production electrical equipment metal material is added in nano particle RH vacuum chamber Download PDFInfo
- Publication number
- CN109338045A CN109338045A CN201811392884.4A CN201811392884A CN109338045A CN 109338045 A CN109338045 A CN 109338045A CN 201811392884 A CN201811392884 A CN 201811392884A CN 109338045 A CN109338045 A CN 109338045A
- Authority
- CN
- China
- Prior art keywords
- added
- nano particle
- vacuum chamber
- nano
- electrical equipment
- 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
- 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
- C21C7/10—Handling in a vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides the techniques that formula production electrical equipment metal material is added in a kind of nano particle RH vacuum chamber, and nano particle phosphorus and nano oxidized lutetium are added into molten steel for the mode being sprinkled into discrete form in RH vacuum chamber, to produce electrical equipment metal material.Compared with prior art, excellent steel are provided for electrical equipment metal material the beneficial effects of the present invention are: meeting external refining RH technology and technique requirement, guarantees electrical equipment safe operation.
Description
Technical field
The present invention relates to RH external refining equipments and technology to apply in electrical equipment metal material field, more particularly to
A kind of technique that formula production electrical equipment metal material is added in nano particle RH vacuum chamber.
Background technique
Iron and steel enterprise of various countries has been accepted by many iron and steel enterprises using benefit by evolution of objective mode, with quality management
It continues to develop and innovates with process optimization, quality concept is also constantly opened up and deepened.RH external refining in metallurgical industry production
Improve steel product quality.With the fast development of steel industry, steel product quality is required also higher and higher.
Chinese patent discloses (bulletin) number: CN108218442A, and entitled " a kind of RH refining is multiple with Al-AlxCry-MgO
The preparation method of condensation material ", disclosure is shown: the present invention relates to a kind of RH refining Al-AlxCry-MgO composite materials
Preparation method, by weight percentage its raw material composition are as follows: the useless magnesite-chrome brick of 40-70%, the magnesia of 20-50%, 2-
20% metallic aluminium powder, the phenolic resin of additional above-mentioned raw materials total amount 2-6% are bonding agent.Various originals are weighed when production according to the ratio
Material is uniformly mixed, obtains pug through mixing, be then pressed into type, be burnt into 48-72h at 100-600 DEG C.Invention product tool
There is the structure of metal-oxide, the formation of different aluminum chromium intermetallic compound during applied at elevated temperature so that liquid phase in material
Appear or disappear present a temperature gradient.The product have the porosity is low, intensity is high, good thermal shock stability, anti-erosion and
The excellent performance indicators such as permeability resistance is good, will not pollute molten steel, can satisfy the smelting of clean steel.The product is burnt without high temperature
At greatly reducing production cost, and useless magnesite-chrome brick is recycled, while also avoiding valence chromium (Cr3+) it is changed into sexavalence
Chromium (Cr6+), it is a kind of environmental type material.But steel clean steel influence factor and the shadow to metal steel function are not accounted for
It rings.
Chinese patent discloses (bulletin) number: CN106893804A, a kind of entitled " RH vacuum circulation degassing purifying method production
The method of hypoxemia ultra-low-carbon steel ", disclosure is shown: the present invention provides a kind of RH vacuum circulation degassing purifying method production hypoxemia
The method of ultra-low-carbon steel.The method comprising the steps of: (1) the oxygen-containing control of molten steel is in 850ppm or less after bessemerizing；(2) turn
Metallurgy lime is added into ladle in furnace tapping process；(3) 0.5-1.0Kg/t steel is added in the ladle top of the slag immediately after tapping
Slag charge；(4) molten steel enters RH refining furnace and carries out vacuum decarburization processing, to steel in vacuum tank after RH refining furnace decarburization 10min
The slag charge of 1.0-1.5#Kg/t steel is added in water；(5) after the decarburization of RH refining furnace molten steel oxygen in 400ppm or less；(6) to steel
In water plus aluminium removes remaining oxygen, and other alloys are added；(7) molten steel recycles 5min or more, and processing terminate, and molten steel removes continuous casting
Casting.The invention can reduce the oxygen in ladle top slag to molten steel using RH vacuum circulation degassing purifying method production hypoxemia ultra-low-carbon steel
Pollution.The influence of metal material function and the needs to clean steel smelting are not accounted for.
Chinese patent discloses (bulletin) number: CN106282490A, entitled " a kind of RH depth decarburization and clean steel smelting side
Method ", disclosure are shown: the present invention discloses a kind of RH depth decarburization and clean steel smelting process, and refining oxygen blast in 5min terminates；
When carbon content of molten steel reaches 0.0030% or less, detection is carried out to the moisture content in lift gas and lift gas is carried out
Humidification process makes the moisture content in lift gas in 10%-50%, and molten steel hydrogen content is in 0.0005%-0.0025%, hereafter
Molten steel recycles 15min-30min, when carbon content of molten steel reaches 0.0010% or less, stops the humidification process to lift gas,
Deoxidier is added, deoxidation is carried out to molten steel, molten steel recycles 10min-30min, and thermometric determines oxygen, determines hydrogen, tapping.It does not account for pressing from both sides
Sundries removal, influences the production of clean steel.
Summary of the invention
The object of the present invention is to provide the works that formula production electrical equipment metal material is added in a kind of nano particle RH vacuum chamber
Skill, meets external refining RH technology and technique requires to provide excellent steel for electrical equipment metal material, guarantees electrical equipment peace
Row for the national games.
To achieve the above object, the present invention is implemented with the following technical solutions:
The technique of formula production electrical equipment metal material is added in nano particle RH vacuum chamber, in RH vacuum chamber in discrete form
Nano particle phosphorus and nano oxidized lutetium are added into molten steel for the mode being sprinkled into, to produce electrical equipment metal material, specific work
Steps are as follows for skill:
1) nano particle is set at RH vacuum chamber upper slot and is sprinkled into device, by nano particle phosphorus and nano oxidized lutetium
It is added in molten steel, nano particle phosphorus granularity is 50nm-100nm, and nano oxidized lutetium granularity is 20nm-100nm；
2) material additional amount is determined according to ladle volume difference:
Y=0.042K-0.023Z+0.009XK
In formula: nanopowder particles amount, unit: ton is added in Y----；
X---- ladle volume, unit: ton；
K---- nano particle impact factor, K=0.2-2.76；
Z---- corrects constant, Z=0.001-3.3；
3) nano particle phosphorus and nano oxidized lutetium is added simultaneously in RH vacuum chamber, nano particle phosphorus and nano oxidized lutetium add
Enter ratio are as follows:
1:0.1---1:1.6
4) RH vacuum degree control is in 3000Pa---5000Pa, RH circular flow 80Nm3/h；
5) nano particle phosphorus is added in RH and the nano oxidized lutetium net circulation time is 7min---10min, and nano particle phosphorus is added
Forbid warming temperature with after nano oxidized lutetium；
6) negative pressure is added 100kg to continuous casting casting time 26min--35min, before cage and pushes up slag.
A kind of device that the technique of nano particle RH vacuum chamber addition formula production electrical equipment metal material uses, including material
Feed bin is divided into two parts up and down, is equipped with and receives in the upper end of feed bin by storehouse, screening vibrator, vibrating screen panel, the vibrating screen panel
Mouth is added in rice grain, is equipped with screw(-type) feeder in the exit of feed bin lower end, sifting vibrating device drives vibrating screen panel vibration, described
Device is fixed at RH vacuum chamber upper slot.
Compared with prior art, the beneficial effects of the present invention are:
External refining RH has outstanding advantage to the smelting of electrical equipment during process for making, is conducive to production electric appliance and sets
Standby metal material, can achieve the purpose of electrical equipment metal material performance during RH external refining.The present invention is true in RH
A device is arranged in empty room upper slot, and nano particle phosphorus and nano oxidized lutetium (all sub-nanometers is added into molten steel by the device
Particle passes through Passivation Treatment), second phase particles, second phase particles are precipitated in the nano oxidized lutetium of addition in the process of setting of molten steel
Grain boundaries are pinned at, play the role of preventing crystal grain grain length big, refinement crystal grain is played, improves steel strength, toughness, hardness.It receives
Rice luteium oxide plays the role of inclusion conditioning in molten steel, steel product quality is improved, to improve steel cleanness.Nano particle phosphorus
Play the cold short effect of metal material, control the content and RH process of nano particle phosphorus, when 150 degrees Celsius it is Celsius to 220
It spends in temperature range, the physics cold short, nanometer phosphorus causes metal material cold short in steel occurs in electrical equipment for metal material
Characteristic, metal material occur cold short to protect electrical equipment not and will receive destruction.Play the role of protecting electrical equipment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that nano particle phosphorus and nano oxidized lutetium device is added in RH.
Fig. 2 is the schematic diagram for sieving vibrator and vibrating screen panel.
In figure: mouth, 3- steel plate, the top 4- feed bin, 5- vibrating screen panel, 6- screening is added in 1- low-carbon magnesia brick, 2- nano particle
Vibrator, 7- screw(-type) feeder.
Specific embodiment
It elaborates below to the present invention, but practical range of the invention is not limited only to embodiment disclosed below.
The technique of formula production electrical equipment metal material is added in nano particle RH vacuum chamber, in RH vacuum chamber in discrete form
Nano particle phosphorus and nano oxidized lutetium are added into molten steel for the mode being sprinkled into, to produce electrical equipment metal material, specific work
Steps are as follows for skill:
1) nano particle is set at RH vacuum chamber upper slot and is sprinkled into device, by nano particle phosphorus and nano oxidized lutetium
It is added in molten steel, nano particle phosphorus granularity is 50nm-100nm (nano particle passivation), and nano oxidized lutetium granularity is 20nm-
100nm (nano particle passivation)；
2) material additional amount is determined according to ladle volume difference:
Y=0.042K-0.023Z+0.009XK
In formula: nanopowder particles amount, unit: ton is added in Y----；
X---- ladle volume, unit: ton；
K---- nano particle impact factor, K=0.2-2.76；
Z---- corrects constant, Z=0.001-3.3；
3) nano particle phosphorus and nano oxidized lutetium is added simultaneously in RH vacuum chamber, nano particle phosphorus and nano oxidized lutetium add
Enter ratio are as follows:
1:0.1---1:1.6；
4) RH vacuum degree control is in 3000Pa---5000Pa, RH circular flow 80Nm3/h；
5) nano particle phosphorus is added in RH and the nano oxidized lutetium net circulation time is 7min---10min, and nano particle phosphorus is added
Forbid warming temperature with after nano oxidized lutetium；
6) negative pressure is added 100kg to continuous casting casting time 26min--35min, before cage and pushes up slag.
A kind of device that the technique of nano particle RH vacuum chamber addition formula production electrical equipment metal material uses, including material
Feed bin is divided into two parts up and down, is equipped in the upper end of feed bin by storehouse, screening vibrator 6, vibrating screen panel 8, the vibrating screen panel 8
Mouth 2 is added in nano particle, is equipped with screw(-type) feeder 7 in the exit of feed bin lower end, sifting vibrating device 6 drives vibrating screen panel 8 to shake
Dynamic, described device is fixed at RH vacuum chamber upper slot.
The shell of device is made of steel plate 3 and low-carbon magnesia brick 1, and nano particle material is added mouth 2 by nano particle first and adds
Enter into top feed bin 4, vibrating screen panel 8 and screening vibrator 6 play the role of screening and prevent putty, and humidity is received in order to prevent
Rice grain Passivation Treatment, material quantitatively enter in the storehouse of lower part after vibration screening, finally feed RH vacuum by screw(-type) feeder
In the molten steel of room.
Embodiment:
RH external refining produces electrical equipment metal material and is shown in Table 1 with steel chemical analysis；
Table 1: electrical equipment metal material is with steel chemical analysis (wt%)
| Element | [C] | [Si] | [Mn] | [P] | [S] | [Lu] | [Ti] | [N] |
| Standard | 0.03--0.012 | 0.32--0.65 | 0.22-0.35 | 0.01--0.53 | ≤0.12 | 0.01--0.18 | 0.01--0.15 | ≤0.05 |
Nano particle phosphorus and nano oxidized lutetium device is added using RH, is added nano particle in RH vacuum chamber, outside RH furnace
Refining production electrical equipment metal material, the specific process steps are as follows:
1) converter tapping slag thickness≤100mm, ladle volume 100t, 1650 degrees Celsius of Tapping Temperature of Bof, tapping is arrived at RH
Manage position time≤23min, converter tapping oxygen content≤300ppm；
2) ladle reaches molten steel temperature≤1610 degree Celsius RH, and nano particle phosphorus granularity is 50nm-100nm (nano particle
Passivation), nano oxidized lutetium granularity is 20nm-100nm (nano particle passivation)；Determine that material is added according to ladle volume 100t
Amount:
Y=0.042K-0.023Z+0.009XK nano particle impact factor K=1 corrects constant Z=1, obtains additional amount Y
=0.919t
Nano particle phosphorus and nano oxidized lutetium is added simultaneously in RH vacuum chamber, nano particle phosphorus and nano oxidized lutetium are added
Ratio are as follows: 1:0.2
3) RH refines the circular treatment time not less than 25min, guarantees minimum vacuum degree≤120Pa, RH external refining needs
Alloying is carried out after preceding sample, thermometric samples after 3~5min of RH valve opening；
4) RH vacuum degree control is in 3000Pa---5000Pa, RH circular flow 80Nm3/h；
5) nano particle phosphorus is added in RH and the nano oxidized lutetium net circulation time is 7min---10min, and nano particle phosphorus is added
Forbid warming temperature with after nano oxidized lutetium；
6) negative pressure is added 100kg to continuous casting casting time 26min--35min, before cage and pushes up slag.
Claims (2)
1. the technique that formula production electrical equipment metal material is added in nano particle RH vacuum chamber, which is characterized in that in RH vacuum chamber
Nano particle phosphorus and nano oxidized lutetium are added into molten steel for the mode being inside sprinkled into discrete form, to produce electrical equipment metal material
Material, the specific process steps are as follows:
1) nano particle is set at RH vacuum chamber upper slot and is sprinkled into device, nano particle phosphorus and nano oxidized lutetium are added
Into molten steel, nano particle phosphorus granularity is 50nm-100nm, and nano oxidized lutetium granularity is 20nm-100nm；
2) material additional amount is determined according to ladle volume difference:
Y=0.042K-0.023Z+0.009XK
In formula: nanopowder particles amount, unit: ton is added in Y----；
X---- ladle volume, unit: ton；
K---- nano particle impact factor, K=0.2-2.76；
Z---- corrects constant, Z=0.001-3.3；
3) nano particle phosphorus and nano oxidized lutetium is added simultaneously in RH vacuum chamber, ratio is added in nano particle phosphorus and nano oxidized lutetium
Example are as follows:
1:0.1---1:1.6
4) RH vacuum degree control is in 3000Pa---5000Pa, RH circular flow 80Nm3/h；
5) nano particle phosphorus is added in RH and the nano oxidized lutetium net circulation time is 7min---10min, and nano particle phosphorus is added and receives
Forbid warming temperature after rice luteium oxide；
6) negative pressure is added 100kg to continuous casting casting time 26min--35min, before cage and pushes up slag.
2. the technique that formula production electrical equipment metal material is added in a kind of nano particle RH vacuum chamber as described in claim 1 is adopted
Device, which is characterized in that including feed bin, screening vibrator, vibrating screen panel, feed bin is divided into upper and lower two by the vibrating screen panel
A part is equipped with nano particle in the upper end of feed bin and mouth is added, and is equipped with screw(-type) feeder, screening vibration in the exit of feed bin lower end
Dynamic device driving vibrating screen panel vibration, described device are fixed at RH vacuum chamber upper slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392884.4A CN109338045B (en) | 2018-11-21 | 2018-11-21 | Process for producing metal material of electric appliance by adding nano-particle RH vacuum chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392884.4A CN109338045B (en) | 2018-11-21 | 2018-11-21 | Process for producing metal material of electric appliance by adding nano-particle RH vacuum chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109338045A true CN109338045A (en) | 2019-02-15 |
| CN109338045B CN109338045B (en) | 2020-06-05 |
Family
ID=65316814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811392884.4A Active CN109338045B (en) | 2018-11-21 | 2018-11-21 | Process for producing metal material of electric appliance by adding nano-particle RH vacuum chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109338045B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994020643A1 (en) * | 1993-03-04 | 1994-09-15 | British Steel Plc | Snorkel for a metallurgical recirculatory vacuum degassing system |
| CN101104197A (en) * | 2007-08-03 | 2008-01-16 | 钢铁研究总院 | Method for dispersion implanting fine heterogeneous particles during metal freezing course and added raw material |
| CN101591719A (en) * | 2009-07-14 | 2009-12-02 | 武汉科技大学 | A kind of smelting process of steel for large heat input welding pipeline |
| CN102676740A (en) * | 2012-05-21 | 2012-09-19 | 合肥开尔纳米能源科技股份有限公司 | Nano composite molten steel purifying agent and preparation method thereof |
| CN104531955A (en) * | 2014-12-15 | 2015-04-22 | 本钢板材股份有限公司 | Coupled dispersing device for spraying nano particles at position of RH downcomer and application method |
-
2018
- 2018-11-21 CN CN201811392884.4A patent/CN109338045B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994020643A1 (en) * | 1993-03-04 | 1994-09-15 | British Steel Plc | Snorkel for a metallurgical recirculatory vacuum degassing system |
| CN101104197A (en) * | 2007-08-03 | 2008-01-16 | 钢铁研究总院 | Method for dispersion implanting fine heterogeneous particles during metal freezing course and added raw material |
| CN101591719A (en) * | 2009-07-14 | 2009-12-02 | 武汉科技大学 | A kind of smelting process of steel for large heat input welding pipeline |
| CN102676740A (en) * | 2012-05-21 | 2012-09-19 | 合肥开尔纳米能源科技股份有限公司 | Nano composite molten steel purifying agent and preparation method thereof |
| CN104531955A (en) * | 2014-12-15 | 2015-04-22 | 本钢板材股份有限公司 | Coupled dispersing device for spraying nano particles at position of RH downcomer and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109338045B (en) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102609009B1 (en) | Polar steel smelting method to control inclusions | |
| CN106435093B (en) | A kind of refining slag and its smelting process for bearing steel production | |
| CN100582248C (en) | Vanadium-raising cooling agent, method for preparing same and use method | |
| CN105063270B (en) | The method for reducing semi-steel making flue dust | |
| CN104164606B (en) | A kind of smelt iron Ohmax adds the method for aluminium | |
| CN113416814B (en) | Method for realizing zero emission of refining slag of LF (ladle furnace) | |
| Zhang et al. | Formation of plastic inclusions in U71Mnk high-speed heavy-rail steel refined by CaO-SiO 2-Al 2 O 3-MgO slag | |
| CN112301186B (en) | Alloy cored wire and application thereof in oxide metallurgy | |
| CN101135021B (en) | Aluminium magnesium ferroalloy for molten steel deoxidization desulfuration and alloying and preparation method thereof | |
| CN109722501B (en) | Ladle top slag modification method suitable for IF steel | |
| CN110387453A (en) | A kind of ferro-aluminum ball and its methods for making and using same | |
| CN100451131C (en) | Production and utilization process for making steel using smelting slag | |
| CN101899604B (en) | Direct alloying steelmaking process for manganese oxide composite briquettes used for re-blowing revolving furnace | |
| CN103233094A (en) | Smelting process of high-strength alloy steel | |
| CN109338045A (en) | The technique that formula production electrical equipment metal material is added in nano particle RH vacuum chamber | |
| CN109576441B (en) | RH refining method for controlling wettability of inclusions in low-carbon aluminum killed steel | |
| CN105506271B (en) | Chrome ore composite pellet and its production method and application are used in a kind of argon oxygen decarburizing furnace reduction | |
| CN101451209B (en) | Method for adding ferroboron during steel smelting process | |
| CN101391287B (en) | Method for controlling steel-slag performance in continuous-casting tundish | |
| CN107604127B (en) | The technique for smelting precipitation hardening steel using vacuum decarburization furnace | |
| CN102642003A (en) | Operating method for adding double-layer covering agent dedicated for non-oriented electrical steel and exchanging slags | |
| CN106544456A (en) | A kind of method that iron produces coverter pig cold pressing block in utilization blast furnace granulated slag | |
| Tang et al. | Cleaning IF molten steel with dispersed in-situ heterophases induced by the composite sphere explosive reaction in RH ladles | |
| CN1827788A (en) | Iron-carbon synthesized block and its application | |
| Li et al. | Inclusion Characteristic in Tinplate Steel in RH Refining and Kinetics Limitation of Calcium Transfer by Refining Slag |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201119 Address after: 056300 Chongyi 4th Street Cun Bei, Wu'an city, Handan City, Hebei Province Patentee after: Wuan Yuhua iron and Steel Co.,Ltd. Address before: 114044 Anshan province hi tech Zone, thousands of mountain road, No. 185, No. Patentee before: University OF SCIENCE AND TECHNOLOGY LIAONING |