CN110306101A - A kind of sulphur alloyage process that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel - Google Patents
A kind of sulphur alloyage process that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel Download PDFInfo
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- CN110306101A CN110306101A CN201910599266.5A CN201910599266A CN110306101A CN 110306101 A CN110306101 A CN 110306101A CN 201910599266 A CN201910599266 A CN 201910599266A CN 110306101 A CN110306101 A CN 110306101A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The invention discloses the sulphur alloyage process that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel, step includes: before the free cutting stainless steel of smelting high-sulfur, first prepurging, the part of slag amount used in it is returned into converter after tapping, new slag is supplemented in converter, the alloy steel ingot that high-sulfur free cutting stainless steel is added is smelted, and is removed in smelting process and the slag completions of weight such as is added after the clinker of part and change slag；Ferrous sulfide is added into furnace after changing slag, quickly stirs, so that clinker in furnace is kept high temperature to electric heating, while carrying out combined deoxidation, taps after the completion of combined deoxidation, tellurium is added in tapping process, obtains high-sulfur free cutting stainless steel.In high-sulfur free cutting stainless steel preparation process of the present invention, ferrous sulfide is not easy splash, and deoxidation is easier to carry out, and can be realized being precisely controlled for alloying element sulfur content and oxygen content.
Description
Technical field
The present invention relates to the sulphur alloyings that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method belongs to field of metal alloy technology.
Background technique
It is a kind of alloy refining furnace of basic lining that three-phase, which has lining electroslag furnace, due to its working principle is that allowing pure iron electrode will
Electric current imports the caustic slag with certain resistance, and for the Joule heat that clinker issues as the origin of heat made steel, clinker is main
Use CaO+Al2O3+ CaO ternary slag system, basicity of slag are relatively high.High basicity is unfavorable, sulphur for the alloying of sulphur (S)
The alloying clinker that needs low alkalinity even acid.
China Patent No. ZL201611228313.8, patent name " free cutting alloy, alloy wire, preparation method, pen
In the patent of head, pen core and pen ", it is indicated that the clinker for pouring out 30-50% in smelting obtains remaining clinker, then to remaining clinker
After middle addition refractory brick brick corresponding with clinker quality is poured out, continue to smelt.In tapping process, tellurium pearl and ferrous sulfide are used
Iron sheet barrel is installed and is bonded on rod iron with iron wire, is inserted into ladle when molten steel temperature is in 1600-1750 DEG C, is completed the alloy of sulphur
Change.
In actual production, which has the disadvantage that the rate of recovery fluctuation of (1) sulphur is very big, is unfavorable for alloy
The content of elementary sulfur is precisely controlled, same ferrous sulfide additional amount, and sulfur content fluctuation range reaches 0.15-0.6% in alloy.
(2) ferrous sulfide is easy to splash out molten steel when being inserted into ladle, splash out molten steel liquid level part by rapid oxidation and
It loses, the sulphur of alloying cannot be formed.
(3) as ferrous sulfide is added in steel, a large amount of oxygen is brought into molten steel, and deoxidation is difficult, the content fluctuation range of oxygen
It is too big, fluctuation range 100-350ppm.
Summary of the invention
The present invention is intended to provide the sulphur that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel closes
Aurification method solves in the prior art the problems such as sulfur content control is not accurate, the easy splash of ferrous sulfide and difficult deoxidation.
The present invention relates to the sulphur alloyings that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, step include:
S1, before refining high-sulfur free cutting stainless steel, to three-phase have lining electroslag furnace carry out prepurging, the matter of the first clinker of use
Amount proportion is CaO:Al2O3:CaF2=(40-50%): (20-30%): (20-30%), by gained refinery cinder quality after tapping
40-60% be back to three-phase and have lining electroslag furnace, obtain the second clinker after new slag is supplemented in furnace, the new slag proportion is
Al2O3:CaF2=(40-60%): (40-60%), the new slag quantity of slag are the 40-60% of the second clinker；
S2, there is the alloy raw material that high-sulfur free cutting stainless steel is added in lining electroslag furnace to smelt in three-phase, smelted described
It is removed in journey and the slag completions of weight such as adds after 30-50% clinker and change slag；
S3, ferrous sulfide is added into furnace after changing slag, quickly stirs, so that clinker in furnace is kept 1650-1750 to electricity heating
DEG C high temperature, while carrying out combined deoxidation, tap after the completion of combined deoxidation, in tapping process plus tellurium, obtain high-sulfur Cutting free not
Become rusty steel.
Preferably, in step S2, it is described change slag and had a power failure at 10-15 minute away from tapping carry out, change after slag to electric.
Preferably, in step S2, the slag composition includes Al2O3And SiO2。
More preferred, in step S2, the slag is schamotte brick.
Specifically, the schamotte brick uses after being fractured into the fragment less than 50mm in step S2.
More preferred, in step S3, contain Al when described2O3And SiO2Institute is added after melting substantially in the slag of ingredient
State ferrous sulfide.
Preferably, in step S3, the combined deoxidation operation includes: to keep stirring trigonum clinker clinker is made not expose steel
Liquid level, stirring while, deoxidier was added into clinker.
More preferred, in step S3, combined deoxidation is carried out using silicon calcium powder as deoxidier.
It is further preferred that the silicon calcium powder is divided into 20-25 parts and is added portionwise in furnace in step S3, add within every 1~2 minute
Enter a silicon calcium powder, until tapping.Specifically, in one embodiment of the invention, the weight of every part of silicon calcium powder is 200g left
It is right.
Preferably, described to give electricity 10-15 minutes a length of when heating up in step S3.
The technical program compared with prior art, generates following technical effect:
(1) in the case where raw material amount of allocating is the same, the resulting alloy sulfur content distribution of the technical program is narrower, benefit
In being precisely controlled for realization alloying element sulfur content.
(2) the technical program solves the problems, such as deoxidation difficulty, and in the case where raw material amount of allocating is the same, this programme
The oxygen content distribution of alloy obtained is narrower, conducive to being precisely controlled for alloy oxygen content is realized.
(3) the technical program realizes ferrous sulfide being individually added into furnace, and ladle is not inserted into together with tellurium, is effectively kept away
Adverse effect of the splash to sulfur recovery rate of tellurium is exempted from.
Specific embodiment
Below in conjunction with specific embodiment and embodiment, it is specifically described the present invention, advantages of the present invention and various effects
It thus will clearly present.It will be understood by those skilled in the art that these specific embodiments and embodiment are for illustrating
The present invention is not intended to limit the present invention.
Throughout the specification, unless otherwise specified, terms used herein are interpreted as usual in this field
Used meaning.Therefore, unless otherwise defined, all technical and scientific terms used herein has leads with belonging to the present invention
The identical meaning of the general understanding of field technique personnel.Contradiction if it exists, this specification are preferential.
Find in the course of the research, it is conventional tellurium pearl and ferrous sulfide be inserted into ladle simultaneously carry out sulphur alloying be difficult to reality
Now it is precisely controlled.Three-phase has in lining electroslag furnace after smelting process, and molten steel and clinker are in temperature-fall period, cooling rate
Quickly.After the completion of tapping, clinker is easy to crust, and insertion depth is easy to be affected, and a large amount of sulphur is caused not enter molten steel, and
It is to be easy to make the rate of recovery fluctuation of sulphur very big by being lost when slag blanket, be unfavorable for the accurate of the content of alloying element sulphur
It controls, same ferrous sulfide additional amount, sulfur content fluctuation range is up to 0.15-0.6% in alloy.And the boiling point of tellurium is very
Low, only 1390 DEG C, ferrous sulfide and tellurium put together and are inserted into ladle, and ferrous sulfide is easy to splash out because of the gasification splash of tellurium
Molten steel, the part for splashing out molten steel liquid level lose rapid oxidation, cannot form the sulphur of alloying.As ferrous sulfide is added
In steel, a large amount of oxygen is brought into molten steel.And after being inserted into FeS in packet, slag temperature declines the phenomenon that even beginning with solidification, no
Conducive to the progress of deoxygenation, cause deoxidation difficult.The content fluctuation range of oxygen is too big, fluctuation range 100-350ppm.
Find that the above problem of common process is affected for being precisely controlled, in the course of the research in order to realize accurate control
System, the present invention provides the sulphur alloying sides that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method comprising:
S1, before refining high-sulfur free cutting stainless steel, to three-phase have lining electroslag furnace carry out prepurging, the prepurging be have in three-phase
The stainless steel that the other kinds of a furnace are smelted in electroslag furnace is served as a contrast, the quality proportioning of the first clinker used is CaO:Al2O3:CaF2=
(40-50%): (20-30%): (20-30%), the 40-60% of gained refinery cinder quality, which is back to three-phase, after tapping lining
Electroslag furnace obtains the second clinker after supplementing new slag in furnace, and the new slag proportion is Al2O3:CaF2=(40-60%): (40-
60%), the new slag quantity of slag is the 40-60% of the second clinker.
Neutral and alkali furnace lining of the present invention can bear higher temperature, be suitble to electroslag furnace high temperature slag melting.Three-phase has lining electroslag furnace
Slag temperature is high, is conducive to the mass transfer between the slag steel in metallurgical process, advantageously to Physical Chemistry of Metallurgy reaction.From melting stage
Start, can be diffused deoxidation to clinker, in entire metallurgical process, clinker is all reducing slag, and compared with electric arc furnaces, alloy is received
Yield is high, is more advantageous to the alloy of smelting high-purity cleanliness.Ball pen head alloying element containing there are many with super free cutting stainless steel, and
Distribution is very narrow, and whole reducing slag advantageously ensures that various yield of alloy and ingredient are precisely controlled.The present invention is in refining ball
Before written high sulfur free-cutting steel, kind refinery cinder similar in a furnace and automatic steel is smelted first, refines liquid after tapping
Clinker returns to converter as a part of smelting slag and supplements new slag in converter, and the addition of new slag makes in clinker
The content ratio of CaO declines, and plays the role of tentatively reducing basicity of slag, advantageous to sulphur alloying.
S2: slag is changed in furnace: having the alloy raw material that high-sulfur free cutting stainless steel is added in lining electroslag furnace to smelt in three-phase, in institute
Slag is changed in the slag completion for stating the weight such as addition after removing 30-50% clinker in smelting process.
Clinker is removed after 30-50% addition and contains Al with weight by the present invention2O3And SiO2The slag of ingredient, both reduces alkali
Degree guarantees the lower conductivity of clinker again, and not cooling down in sulphur alloying process is diffused in sulphur in molten steel rapidly.
S3: the alloying of sulphur: ferrous sulfide being added into furnace after changing slag, quickly stirs, and protects clinker in furnace to electricity heating
1650-1750 DEG C of high temperature is held, while carrying out combined deoxidation, is tapped after the completion of combined deoxidation, tellurium is added in tapping process, obtains height
Sulphur free cutting stainless steel.
Ferrous sulfide is added after changing slag in furnace in the present invention, then proceedes to heat up to electricity, clinker is made to be kept for 1700 DEG C or so
High temperature, the mass transfer between this advantageous clinker and molten steel, clinker has a good mobility at this time, and ferrous sulfide is easier logical
It crosses slag blanket and enters molten steel, good deoxidation effect can be obtained, be conducive to while stablizing sulfur content, the content of Stable Oxygen.
The present invention quickly stirs steel slag after ferrous sulfide is added, and improves element alloyed dynamic conditions, while with very fast
Speed carries out combined deoxidation operation, oxygen content in molten steel is determined by observing clinker color, to control targeted oxygen content.
It is the sulphur alloy that three-phase of the present invention has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel below
The example explanation of change method.
Embodiment 1
Present embodiments provide a kind of sulphur conjunction that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Aurification method, step include:
S1, before refining high-sulfur free cutting stainless steel, have in lining electroslag furnace in three-phase and smelt product similar in a furnace and automatic steel
Kind stainless steel, the quality proportioning of the first clinker used is CaO:Al2O3:CaF2=50%:25%:25%, by gained after tapping
The 50% of refinery cinder quality, which is back to three-phase, lining electroslag furnace, and supplement is equivalent to the new of total slag amount 50% in converter
Slag, the new slag proportion is Al2O3:CaF2=50%:50%.
S2, the alloy steel ingot that high-sulfur free cutting stainless steel is added in lining electroslag furnace smelts in three-phase, various metals in furnace
After cobbing is melting down, that is, start to carry out strong deoxidation, when away from tapping 10 minutes, having a power failure, 40% clinker is poured out from furnace, uses clayey
Refractory brick is broken into the fragment less than 50mm as slag former, supplements and pour out the equiponderant schamotte brick fritter of clinker
Slag is changed in material, completion.
S3, it changes after slag to electricity, after the schamotte brick cobbing after newly supplement melts substantially, ferrous sulfide is all added
Enter in furnace, quickly stir steel slag, improve element alloyed dynamic conditions, so that clinker in furnace is kept 1700 to electricity heating
DEG C or so high temperature, while carrying out combined deoxidation, the combined deoxidation can be operated completion by two people, and a personal responsibility is stirred with irony
Mixing stick, rest point does not move trigonum clinker, is advisable with not exposing molten steel face；One personal responsibility is added by interval time requirement into clinker
Silicon calcium powder.Specifically, using silicon calcium powder as when deoxidier implementation deoxidation, silicon calcium powder is divided into 200 grams of portions, amounts to 20 parts,
The portion silicon calcium powder of addition in every 1 minute, until tapping.Add tellurium in tapping process, obtains high-sulfur free cutting stainless steel.
In this embodiment, raw material amount of allocating specifically: raw material total input amount 1930kg, crome metal 324kg, electrolytic manganese
23kg, molybdenum-iron 49kg, ferrous sulfide 40kg, alum iron 2.5kg, ferro-niobium 1.5kg, tellurium pearl 2.5kg, ferrophosphorus 1kg, surplus is industry
Pure iron.High-sulfur free cutting stainless steel sulfur content is measured after smelting more furnaces, resulting alloy sulfur content distribution is
0.2-0.35%, oxygen content distribution are 100-180ppm.
Comparative example 1
This comparative example uses and the identical raw material amount of allocating smelting high-sulfur free cutting stainless steel of embodiment 1, and step includes:
There is lining electroslag furnace melting using three-phase, produces alloy steel ingot.
For the alloy steel ingot, using working with a basic slag, the clinker of quality accounting 40% everywhere in smelting process,
Obtain remaining clinker.
The refractory brick brick equal with clinker quality is poured out is added into remaining clinker, continues to smelt, using silicon calcium powder as
Deoxidier carries out deoxidation, and additional amount is equal with 1 deoxidier total amount of adding of embodiment, indefinite number, uneven amount, unlimited interval time
It is added at one time, does not stir in the process.
In tapping process, tellurium pearl and ferrous sulfide are installed with iron sheet barrel and tied up on rod iron with iron wire, in molten steel temperature
It is inserted into ladle when in 1700 DEG C or so, obtains high-sulfur free cutting stainless steel.
In this comparative example, raw material amount of allocating and other smelting conditions and embodiment 1 are consistent, smelt after more furnaces to height
Sulphur free cutting stainless steel sulfur content is measured, and resulting alloy sulfur content distribution is 0.15-0.6%, oxygen content distribution
Range is 100-350mm.
Embodiment 2
Present embodiments provide a kind of sulphur conjunction that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Aurification method, step include:
S1, before refining high-sulfur free cutting stainless steel, have in lining electroslag furnace in three-phase and smelt product similar in a furnace and automatic steel
Kind stainless steel, the quality proportioning of the first clinker used is CaO:Al2O3:CaF2=45%:30%:30%, by gained after tapping
The 45% of refinery cinder quality, which is back to three-phase, lining electroslag furnace, and supplement is equivalent to the new of total slag amount 55% in converter
Slag, the new slag proportion is Al2O3:CaF2=45%:55%.
S2, the alloy raw material that high-sulfur free cutting stainless steel is added in lining electroslag furnace smelts in three-phase, various metals in furnace
After cobbing is melting down, that is, start to carry out strong deoxidation, when away from tapping 15 minutes, having a power failure, 35% clinker is poured out from furnace, uses clayey
Refractory brick is broken into the fragment less than 50mm as slag former, supplements and pour out the equiponderant schamotte brick fritter of clinker
Slag is changed in material, completion.
S3, it changes after slag to electricity, after the schamotte brick cobbing after newly supplement melts substantially, ferrous sulfide is all added
Enter in furnace, quickly stir steel slag, improve element alloyed dynamic conditions, so that clinker in furnace is kept 1680 to electricity heating
DEG C or so high temperature, while carrying out combined deoxidation, the combined deoxidation can be operated completion by two people, and a personal responsibility is stirred with irony
Mixing stick, rest point does not move trigonum clinker, is advisable with not exposing molten steel face；One personal responsibility is added by interval time requirement into clinker
Silicon calcium powder.Specifically, using silicon calcium powder as when deoxidier implementation deoxidation, silicon calcium powder is divided into 200 grams of portions, amounts to 25 parts,
The portion silicon calcium powder of addition in every 1 minute, until tapping.Add tellurium in tapping process, obtains high-sulfur free cutting stainless steel.
In this embodiment, raw material amount of allocating specifically: raw material total input amount 1930kg, crome metal 324kg, electrolytic manganese
23kg, molybdenum-iron 49kg, ferrous sulfide 40kg, alum iron 2.5kg, ferro-niobium 1.5kg, tellurium pearl 2.5kg, ferrophosphorus 1kg, surplus is industry
Pure iron.High-sulfur free cutting stainless steel sulfur content is measured after smelting more furnaces, resulting result statistics is as follows:
| Heat (batch) number | Oxygen content, PPm | Sulfur content Wt% |
| 117-1698 | 110 | 0.2 |
| 118-739 | 108 | 0.21 |
| 118-741 | 119 | 0.26 |
| 118-740 | 127 | 0.28 |
| 118-1027 | 136 | 0.30 |
| 118-1028 | 174 | 0.35 |
| 118-2088 | 180 | 0.35 |
| 118-1203 | 145 | 0.29 |
| 118-1206 | 152 | 0.32 |
| 118-1224 | 165 | 0.33 |
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. the sulphur alloyage process that a kind of three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel, step packet
It includes:
S1, before refining high-sulfur free cutting stainless steel, there is lining electroslag furnace to carry out prepurging three-phase, the quality of the first clinker of use matches
Than for CaO:Al2O3:CaF2=(40-50%): (20-30%): (20-30%), by gained refinery cinder quality after tapping
40-60%, which is back to three-phase, lining electroslag furnace, obtains the second clinker after new slag is supplemented in furnace, the new slag proportion is Al2O3:
CaF2=(40-60%): (40-60%), the new slag quantity of slag are the 40-60% of the second clinker；
S2, the alloy raw material that high-sulfur free cutting stainless steel is added in lining electroslag furnace smelts in three-phase, in the smelting process
It removes and the slag completions of weight such as adds after 30-50% clinker and change slag；
S3, ferrous sulfide is added into furnace after changing slag, quickly stirs, so that clinker in furnace is kept for 1650-1750 DEG C to electricity heating
High temperature, while combined deoxidation is carried out, it taps after the completion of combined deoxidation, tellurium is added in tapping process, obtains high-sulfur free cutting stainless steel.
2. the sulphur alloying that three-phase as described in claim 1 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, it is characterised in that: in step S2, it is described change slag and had a power failure at 10-15 minute away from tapping carry out, change after slag to electric.
3. the sulphur that three-phase as claimed in claim 1 or 2 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel closes
Aurification method, it is characterised in that: in step S2, the slag composition includes Al2O3And SiO2。
4. the sulphur alloying that three-phase as claimed in claim 3 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, it is characterised in that: in step S2, the slag is schamotte brick.
5. the sulphur alloying that three-phase as described in claim 1 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, it is characterised in that: in step S3, the combined deoxidation operation includes: to keep stirring trigonum clinker to expose clinker not
Molten steel face, stirring while, deoxidier was added into clinker.
6. the sulphur that three-phase as claimed in claim 1 or 5 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel closes
Aurification method, it is characterised in that: in step S3, combined deoxidation is carried out using silicon calcium powder as deoxidier.
7. the sulphur alloying that three-phase as claimed in claim 6 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, it is characterised in that: in step S3, the silicon calcium powder is divided into 20-25 parts and is added portionwise in furnace, and addition in every 1~2 minute is a
Silicon calcium powder, until tapping.
8. the sulphur alloying that three-phase as described in claim 1 has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel
Method, it is characterised in that: described to give electricity 10-15 minutes a length of when heating up in step S3.
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| CN201910599266.5A CN110306101B (en) | 2019-07-04 | 2019-07-04 | Sulfur alloying method for high-sulfur free-cutting stainless steel for smelting ball pen point by three-phase lined electroslag furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110938729A (en) * | 2019-12-09 | 2020-03-31 | 北京首钢吉泰安新材料有限公司 | Deoxidizer for smelting nickel-chromium steel by electroslag furnace and deoxidation method thereof |
| CN113684345A (en) * | 2021-08-27 | 2021-11-23 | 安徽工业大学 | Preparation method of free-cutting electroslag remelting stainless steel and stainless steel prepared by method |
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| CN109295384A (en) * | 2018-08-31 | 2019-02-01 | 上海大学 | The automatic steel and preparation method thereof of sulfur-bearing tin tellurium |
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| JPS56150156A (en) * | 1980-04-22 | 1981-11-20 | Sumitomo Metal Ind Ltd | Preparation of free cutting steel |
| CN105567899A (en) * | 2016-01-11 | 2016-05-11 | 中天钢铁集团有限公司 | Smelting method for improving cutting performance of round steel for machinery |
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| CN110938729A (en) * | 2019-12-09 | 2020-03-31 | 北京首钢吉泰安新材料有限公司 | Deoxidizer for smelting nickel-chromium steel by electroslag furnace and deoxidation method thereof |
| CN110938729B (en) * | 2019-12-09 | 2021-10-08 | 北京首钢吉泰安新材料有限公司 | Deoxidizer for smelting nickel-chromium steel by electroslag furnace and deoxidation method thereof |
| CN113684345A (en) * | 2021-08-27 | 2021-11-23 | 安徽工业大学 | Preparation method of free-cutting electroslag remelting stainless steel and stainless steel prepared by method |
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