CN106498115B - A kind of method of chrome-bearing alloy steel converter tapping control Ti contents - Google Patents
A kind of method of chrome-bearing alloy steel converter tapping control Ti contents Download PDFInfo
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- CN106498115B CN106498115B CN201710019706.6A CN201710019706A CN106498115B CN 106498115 B CN106498115 B CN 106498115B CN 201710019706 A CN201710019706 A CN 201710019706A CN 106498115 B CN106498115 B CN 106498115B
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- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
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- 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
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention proposes a kind of technique of chrome-bearing alloy steel converter tapping control Ti contents, and converter stays slag method to make steel using single slag.The special loading system for being quantitatively adding the raw materials such as chrome ore, lime in batches is used in process of bessemerizing, and uses N2Turn the bottom blowing pattern of Ar.This technique improves the Cr contents of converter molten steel terminal, and contrast reduces tapping process and adds ferrochrome 800kg 1200kg, reduces steel making working procedure cost.Reduce 30 DEG C or so of the temperature drop 25 DEG C of tapping process alloying generation, reduce LF stoves electric power feeding time 8 12 minutes or so, save the LF process energy.Avoid plus ferrochrome process Ti elements enter molten steel, effectively reduce the Ti contents of molten steel, reduce in steel because the high TiN formed of Ti contents and (TiCN) nitrogenize titanium inclusion, improve the quality of chrome-bearing alloy steel.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, more particularly to a kind of tapping of chrome-bearing alloy steel converter to control Ti contents
Method.
Background technology
In recent years due to the huge advance of process for making, oxidation type impurity is basic in the production of chrome-bearing alloy steel obtains
To control, during chrome-bearing alloy steel is produced the control of nitride inclusion thing be increasingly taken seriously, TiN and (TiCN) are
Main nitridation type impurity, it is to control the main means of nitride to control Ti contents in molten steel.
Titanium nitride is a kind of hard and crisp field trash, it can reduce the fatigue life of steel, in the field trash of same levels
In, the harm of nitride is greater than oxide.There are a certain amount of Ti elements in the alloy added in converter tapping process, especially
It is ferrochrome, its Ti content is higher.Containing more than 1.0% Cr in chrome-bearing alloy steel, tapping to reach Cr contents needs
Journey adds the ferrochrome of more than 2.5t, and the impurity Ti contained in ferrochrome enters in molten steel therewith.Chrome-bearing alloy steel exists
Converter uses the oxygen content of molten steel in aluminium deoxidation alloying process very low, is difficult to be removed into the Ti in molten steel.Blown in converter
Refining process carries out the addition of chrome ore, using the oxygen content of converting process middle and high concentration, fuses into Ti in molten steel to aoxidize chrome ore, can
Effectively to remove the Ti in chrome-bearing alloy steel, however lack at present it is a kind of can effectively control the bessemerizing of Ti contents during
Add the process of evanohm.
The Ti contents brought into because of the addition of alloy in molten steel are effectively reduced in tapping process, are made herein to control
The Ti contents of molten steel processed, by measure, molten steel component Ti contents are about 0.0020% or so than using now with technique steel
Water Ti contents reduce by more than 50%.
The content of the invention
The present invention be directed to above-mentioned technical problem, according to green grass or young crops steel in the practice of converter producing chrome-bearing alloy steel, passes through theory
Analysis and produced on-site are combined, and the method for proposing addition evanohm during a kind of bessemerize, can effectively control molten steel
In Ti contents, after measured, converter terminal Ti contents are about 0.0010% suitable with existing process, not because converting process add
Chrome ore influences the Ti contents of converter molten steel terminal.Molten steel component Ti contents are less than 0.0020%, because alloying adds chromium less
Ferroalloy molten steel component Ti is substantially reduced.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of method of chrome-bearing alloy steel converter tapping control Ti contents, stays slag method to smelt, in converting process using single slag
Slag charge is added according to following system, blowing, which starts to concentrate for 1-2 minutes, adds lime 2000kg-3000kg, chrome ore 1000kg-
1500kg, lime stone 800kg-1200kg blow 3-4 minutes as first slag material and add 200kg-500kg cooling agents, blow
Refining added quantitative chrome ore, fluorite and lime every 1 minute in 5-9 minutes.
Preferably, bottom blown gas pressure is 0.8Mpa-1.4Mpa, employ nitrogen as within 7 minutes before to molten iron and blowing
Based on stir source of the gas, blowing start 7 minutes after be switched to argon gas stirring.
Preferably, the air supply intensity scope of bottom blown gas nitrogen, argon gas is respectively nitrogen 0.025-0.30Nm3/t
Min, argon gas 0.025-0.30Nm3/t min。
Preferably, the cooling agent is sinter.
Preferably, converting process uses following oxygen supply system, O2When concentration is less than 6%, every staged increase in 20 seconds
Oxygen supply by lance amount, increases 2000m every time3/ h, increases by 3 times, last oxygen flow stabilization is in 20000m altogether3/ h, pressure 0.9Mpa.
Preferably, according to aluminium ingot (addition 80kg-120kg) → ferrochrome (according to terminal Cr in tapping process
Content determines) → carburant (500kg-800kg) → high purity ferrosilicon (200kg-350kg) → mid-carbon fe-mn (250kg-350kg)
Addition and order add alloy.
Preferably, the chrome ore its chemical composition by weight percentage is：Cr2O3>=40%, Cr2O3/ FeO >=2.5, P
≤ 0.07%, S≤0.05%, SiO2≤ 6.0%.
Preferably, chrome ore granularity is 0.5-60mm.
Compared with prior art, the advantages and positive effects of the present invention are：
1st, converter stays slag method to make steel using single slag, and the rate of recovery of Cr elements, Cr are improved using saturation Cr in previous clinker
The rate of recovery can reach more than 45%.
2nd, this technique improves the Cr contents of converter molten steel terminal, and contrast reduces tapping process and adds ferrochrome 800kg-
1200kg, reduces steel making working procedure cost.
3rd, reduce 25 DEG C -30 DEG C or so of the temperature drop of tapping process alloying generation, reduce 8-12 points of LF stove electric power feeding times
Clock or so, saves the LF process energy.
4th, produce chrome-bearing alloy steel reduces tapping process ferrochrome using the Cr bessemerized in process reducing chrome ore
Addition, avoid plus ferrochrome process Ti elements enter molten steel, effectively reduce the Ti contents of molten steel, reduce in steel
Because the high TiN formed of Ti contents and (TiCN) nitrogenize titanium inclusion, the quality of chrome-bearing alloy steel is improved.
Embodiment
In order to be better understood from the present invention, illustrated with reference to embodiment.
Embodiment 1：
Exemplified by smelting SUJ2 type chrome-bearing alloy steel, carried out according to following processing step.The chrome-bearing alloy steel chemistry into
Divide and be by weight percentage：C：0.96, Si：0.021, Mn：0.35, P：0.011, S：0.001, Al：0.027, Ca：0.0004,
Cr：1.46 Ti：0.0019, surplus is iron.
1) molten iron pre-processes, and molten iron situation is as follows after pretreatment：
| C, % | Si, % | Mn, % | P, % | S, % | Ti, % | T,℃ | Weight, t |
| 4.07 | 0.59 | 0.29 | 0.119 | 0.001 | 0.060 | 1326 | 100 |
Converter steelmaking process is mitigated using the molten iron of pretreatment and takes off S pressure.
2) converter stays slag method to smelt using single slag, and the rate of recovery of Cr elements, Cr are improved using saturation Cr in previous clinker
The rate of recovery can reach more than 45%.1 point of blowing is concentrated for 30 seconds adds slag material 3t lime, lime stone 1t, chrome ore 1.2t.Add
2 high hoppers of Shi Caiyong load, and are conducive to mix with slag materials such as lime when chrome ore is concentrated addition and added, early period
Addition chrome ore is concentrated to improve the recovery rate of Cr elements.Enter chrome ore, fluorite, lime etc. in batches after blowing 3 minutes, add stone altogether
Grey 4.2t chrome ores 4.1t, fluorite 250kg, it is specific to add time and batch such as following table.
Wherein, chrome ore 1, chrome ore 2 are same raw material for the chrome ore of two different feed bins.Chrome ore technical indicator is chemical composition
Cr2O3：42%th, Cr2O3/FeO：2.0、P：0.05%th, S：0.0:3%th, SiO2：6.0%, granularity 0.5mm-60mm.
3) blow experienced process and use bottom blowing pattern as F patterns, table specific as follows.
4) converter terminal tapping Composition Control：C:0.13%, P:0.009%, S:0.004%, Cr:0.506%, tapping temperature
Degree:1650℃；Ferro-aluminum is added after 5 tons of tapping, and when tapping 1/4 adds ferrochrome 1818kg, low nitrogen carburant 658kg, high purity ferrosilicon
285kg, mid-carbon fe-mn 280kg, when tapping 2/3, add, and have gone out and 150Kg lime dry slags are added after steel.To 1483 DEG C of LF stoves thermometric,
LF stoves electric power feeding time 10 minutes or so is saved than improving 25 DEG C -30 DEG C now with technique to LF stove thermometric temperature.
Molten steel is analyzed, wherein Ti contents are 0.0011% in the molten steel sampled after LF refining temperature raising slugging, and
Chromium pattern Ti contents 0.0019%-0.0030% is matched somebody with somebody using deoxidation alloying after whole stoves, it is seen that Ti contents reduce in molten steel, and
The addition of converter alloying ferrochrome significantly reduces.Molten steel component Ti contents are 0.0019%, and prior art production
Ti contents are 0.0035%-0.0049% in SUJ2 steel, it is seen that Ti contents reduce 50% or so.
Embodiment 2：
Chrome-bearing alloy steel steel SUJ2, the chemical composition of the chrome-bearing alloy steel are by weight percentage：C：0.98, Si：
0.023, Mn：0.34, P：0.009, S：0.001, Al：0.028, Ca：0.0005, Cr：1.45 Ti：0.0017, surplus is iron.
1) after molten iron pretreatment, molten iron situation.
| C, % | Si, % | Mn, % | P, % | S, % | Ti, % | T,℃ | Weight, t |
| 4.58 | 0.56 | 0.27 | 0.118 | 0.001 | 0.064 | 1309 | 100 |
Converter steelmaking process is mitigated using the molten iron of pretreatment and takes off S pressure.
2) converter stays slag method to smelt using single slag, blows 1 point of 30 seconds concentration of white silk and adds slag material 3.1t lime, chrome ore 1.35t,
Addition chrome ore is concentrated early period to improve the recovery rate of Cr elements.Enter chrome ore, fluorite, lime etc. in batches after blowing 3 minutes, add altogether
Enter lime 4.35t, chrome ore 4.5t, fluorite 260kg, it is specific to add time and batch such as following table.
Chrome ore 1, chrome ore 2 are same raw material for the chrome ore of two different feed bins.Chemical composition Cr2O3：42%th, Cr2O3/FeO：
2.0、P：0.05%th, S：0.0:3%th, SiO2：6.0%, granularity 0.5mm-60mm.
3) blowing experienced process uses bottom blowing pattern to see the table below for F patterns, details.
4) converter terminal tapping Composition Control：C:0.13%P:0.007%, S:0.002%, Cr:0.55, Ti：
0.0006%, tapping temperature:1647℃；Ferro-aluminum is added after 5 tons of tapping, and when tapping 1/4 adds ferrochrome 1730kg, low nitrogen carburant
658kg, high purity ferrosilicon 281kg, mid-carbon fe-mn 277kg, when tapping 2/3, add, and have gone out and 150Kg lime dry slags are added after steel.Arrive
1477 DEG C of LF stoves thermometric, LF stoves electric power feeding time is saved 8 minutes than improving 25 DEG C or so now with technique to LF stove thermometric temperature
Left and right.
It is 0.0012% that molten steel Ti contents are sampled after into LF refining body temperature slugging, hence it is evident that less than using deoxygenation after whole stoves
Aurification matches somebody with somebody chromium pattern Ti contents 0.0019%-0.0030%.The addition of converter alloying ferrochrome is reduced, molten steel Ti contents reduce
Substantially.
Molten steel is analyzed, wherein molten steel component Ti contents are 0.0017%.Than the SUJ2 of prior art production
Ti contents 0.0035%-0.0049%, Ti contents reduce more than 50% in steel.
Embodiment 3：
Chrome-bearing alloy steel steel SUJ2, the chemical composition of the chrome-bearing alloy steel are by weight percentage：C：0.99, Si：
0.021, Mn：0.36, P：0.009, S：0.001, Al：0.025, Ca：0.0005, Cr：1.46 Ti：0.0017, surplus is iron.
1) after molten iron pretreatment, molten iron situation.
| C, % | Si, % | Mn, % | P, % | S, % | Ti, % | T,℃ | Weight, t |
| 4.70 | 0.53 | 0.30 | 0128 | 0.001 | 0.054 | 1388 | 100 |
Converter steelmaking process is mitigated using the molten iron of pretreatment and takes off S pressure.
2) converter stays slag method to smelt using single slag, blows 1 point of 30 seconds concentration of white silk and adds slag material 3t lime, 1.23t chrome ores,
(concentration addition early period chrome ore can improve the recovery rate of Cr elements) enters chrome ore, fluorite, lime etc. in batches after blowing 3 minutes, altogether
Add lime 4.01t chrome ores 4.1t, fluorite 280kg.It is specific to add time and batch such as following table.
Chrome ore 1, chrome ore 2 are same raw material for the chrome ore of two different feed bins.Chemical composition Cr2O3：42%th, Cr2O3/FeO：
2.0、P：0.05%th, S：0.0:3%th, SiO2：6.0%, granularity 0.5mm-60mm.
3) blowing experienced process uses bottom blowing pattern to see the table below for F patterns, details.
4) converter terminal tapping Composition Control：C:0.05%, P:0.006%, S:0.004%, Cr:0.51, Ti：
0.0006%, tapping temperature:1650℃；Ferro-aluminum is added after 5 tons of tapping, and when tapping 1/4 adds ferrochrome 1770kg, low nitrogen carburant
720kg, high purity ferrosilicon 277kg, mid-carbon fe-mn 281kg, when tapping 2/3, add, and have gone out and 150Kg lime dry slags are added after steel.Arrive
1480 DEG C of LF stoves thermometric, than improving 28 DEG C or so saving LF stove power transmission temperature raising times 9 now with technique to LF stove thermometric temperature
Minute or so.
Molten steel is analyzed, wherein being 0.0011% into molten steel Ti contents are sampled after LF refining body temperature slugging, hence it is evident that low
Deoxidation alloying matches somebody with somebody chromium pattern Ti content 0.0019%-0.0030% after using whole stoves, reduces converter alloying ferrochrome
Addition, molten steel Ti contents reduce obvious.
Molten steel component Ti contents are 0.0017%, than Ti contents 0.0035%- in the SUJ2 steel of prior art production
0.0049%, Ti content reduce more than 50%.
Method described in above example improves the Cr contents of converter molten steel terminal, and contrast reduces tapping process and adds
Ferrochrome 800kg-1200kg, reduces steel making working procedure cost.Reduce 25 DEG C of -30 DEG C of left sides of temperature drop of tapping process alloying generation
The right side, reduces LF stove electric power feeding times 8-12 minutes or so, saves the LF process energy.Avoid plus ferrochrome process Ti elements enter steel
Water, effectively reduces the Ti contents of molten steel, reduces in steel because the high TiN formed of Ti contents and (TiCN) titanium nitride are mingled with
Thing, improves the quality of chrome-bearing alloy steel.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Effect embodiment is applied to other fields, but every without departing from technical solution of the present invention content, the technical spirit according to the present invention
Any simple modification, equivalent variations and the remodeling made to above example, still fall within the protection domain of technical solution of the present invention.
Claims (8)
- A kind of 1. method of chrome-bearing alloy steel converter tapping control Ti contents, it is characterised in that：Stay slag method to smelt using single slag, blow Slag charge is added according to following system during refining, blowing, which starts to concentrate for 1-2 minutes, adds lime 2000kg-3000kg, chrome ore 1000kg-1500kg, lime stone 800kg-1200kg are as first slag material, and blowing 3-4 minutes, it is cold to add 200kg-500kg But agent, blowing added quantitative chrome ore, fluorite and lime every 1 minute in 5-9 minutes.
- 2. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 1, it is characterised in that：Bottom Blowing Body pressure is 0.8Mpa-1.4Mpa, employ nitrogen as within 7 minutes before to molten iron and blowing based on stir source of the gas, blowing start 7 Argon gas stirring is switched to after minute.
- 3. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 2, it is characterised in that：Bottom Blowing Body nitrogen, the air supply intensity scope of argon gas are respectively nitrogen 0.025-0.30Nm3/（t min）, argon gas 0.025-0.30Nm3/（t min）.
- 4. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 1, it is characterised in that：It is described cold But agent is sinter.
- 5. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 1, it is characterised in that：Blew Below Cheng Caiyong oxygen supply systems, O2When concentration is less than 6%, increase oxygen supply by lance amount every 20 seconds stageds, increase every time 2000m3/ h, increases by 3 times, last oxygen flow stabilization is in 20000m altogether3/ h, pressure 0.9Mpa.
- 6. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 1, it is characterised in that：Tapping During according to aluminium ingot 80kg-120kg → ferrochrome, addition → carburant 500kg- is determined according to terminal Cr contents The addition and order of 800kg → high purity ferrosilicon 200kg-350kg → mid-carbon fe-mn 250kg-350kg adds alloy.
- 7. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 3, it is characterised in that：The chromium Ore deposit its chemical composition by weight percentage is：Cr2O3>=40%, Cr2O3/ FeO >=2.5, P≤0.07%, S≤0.05%, SiO2 ≤ 6.0%.
- 8. the method for chrome-bearing alloy steel converter tapping control Ti contents according to claim 6, it is characterised in that：Chrome ore grain Spend for 0.5-60mm.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540705A (en) * | 2013-10-30 | 2014-01-29 | 承德建龙特殊钢有限公司 | Method for adding metal chromium in converter steelmaking process |
| CN103911479A (en) * | 2014-04-22 | 2014-07-09 | 武汉钢铁(集团)公司 | Method for directly reducing and alloying chromium ore in 90t top-bottom combined blowing converter |
| CN104212935A (en) * | 2014-08-22 | 2014-12-17 | 山东西王特钢有限公司 | Method for producing high-grade GCr15 bearing steel by using high-titanium chrome iron |
| CN105483316A (en) * | 2016-01-19 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Direct alloying method of chrome ores in converter |
| CN105483315A (en) * | 2016-01-19 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Direct alloying method of chrome ores in semi-steel making converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54158320A (en) * | 1978-06-03 | 1979-12-14 | Nippon Steel Corp | Refining method for high chromium steel |
-
2017
- 2017-01-12 CN CN201710019706.6A patent/CN106498115B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540705A (en) * | 2013-10-30 | 2014-01-29 | 承德建龙特殊钢有限公司 | Method for adding metal chromium in converter steelmaking process |
| CN103911479A (en) * | 2014-04-22 | 2014-07-09 | 武汉钢铁(集团)公司 | Method for directly reducing and alloying chromium ore in 90t top-bottom combined blowing converter |
| CN104212935A (en) * | 2014-08-22 | 2014-12-17 | 山东西王特钢有限公司 | Method for producing high-grade GCr15 bearing steel by using high-titanium chrome iron |
| CN105483316A (en) * | 2016-01-19 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Direct alloying method of chrome ores in converter |
| CN105483315A (en) * | 2016-01-19 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Direct alloying method of chrome ores in semi-steel making converter |
Non-Patent Citations (1)
| Title |
|---|
| 转炉少渣吹炼铬矿直接合金化基础研究;章奉山等;《钢铁》;20010531;第36卷(第5期);第17-20页 * |
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