1. |
Carburization of hot metal by industrial and special cokes |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 97-104
Heinrich Wilhelm Gudenau,
Jean Paul Mulanza,
D. Ganpath Ram Sharma,
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摘要:
In the present paper, a study has been made of carbon dissolution from industrial cokes and specially treated cokes in hot metal. With these results obtained together with earlier investigations, a model is now presented, which attempts to explain carbon pick‐up from coke by hot metal. Factors relating to hot metal, coke and experimental conditions are included in the model. An attempt is also made to quantify carbon dissolution behaviour from coke in hot metal in comparison with that of pure graphite. It was determined, that the carburizing ability of cokes can be modified by controlling the ash compositon. The results of the special cokes indicate clearly that the presence of iron oxide is favourable for carburization. Some additives, i.e. CaO, MgO, SiO2and Al2O3reduce significantly the dissolution of carbon.
ISSN:0003-8962
DOI:10.1002/srin.199000309
出版商:Wiley
年代:2016
数据来源: WILEY
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2. |
ECSC announcements |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 104-104
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ISSN:0003-8962
DOI:10.1002/srin.199000310
出版商:Wiley
年代:2016
数据来源: WILEY
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3. |
Model calculations for mass transfer with mixing in ladle metallurgy |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 105-112
Jürgen Mietz,
Michael Brühl,
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摘要:
It is well known that in secondary metallurgy during gas stirring, zones with differing degrees of homogeneity can occur in the liquid steel. By means of model calculations it will be demonstrated under which conditions mixing has to be considered for mass‐transfer phenomena, as for example desulphurization. Under unfavourable conditions, i.e. large regions with low flow velocities – so‐called dead zones – and low values for the exchange volume flow between these regions and the bulk volume, the equalization of concentration will become the rate‐determining step for the total mass transfer. In order to avoid or minimize dead zones, the general flow pattern in the ladle has to be optimized.
ISSN:0003-8962
DOI:10.1002/srin.199000311
出版商:Wiley
年代:2016
数据来源: WILEY
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4. |
ECSC announcements |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 112-112
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PDF (97KB)
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ISSN:0003-8962
DOI:10.1002/srin.199000312
出版商:Wiley
年代:2016
数据来源: WILEY
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5. |
Thermodynamics of Mn–Fe–C and Mn–Si–C system |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 113-116
Ruiming Ni,
Zhongting Ma,
Shoukun Wei,
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摘要:
The solubility of C in Mn melts with different contents of Si and Fe at 1400 and 1500°C was determined. With these data the interaction coefficientseSiC,eFeC,eCCas well as γoCwere evaluated. The standard free energy of solution of C in liquid Mn based on 1 wt.% solution standard at 1400 and 1500°C were calculated, respectively. The solubility of C in liquid Mn formulated in relation to temperature was made as to the conformability of the present results with those given in the literature.
ISSN:0003-8962
DOI:10.1002/srin.199000313
出版商:Wiley
年代:2016
数据来源: WILEY
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6. |
Entwicklung eines Analysenverfahrens zur Bestimmung von metallischem und chemisch gebundenem Calcium in Stahl |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 117-120
Alfred Golloch,
Wolfgang Funk,
Erwin Thiemann,
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摘要:
Durch Kombination eines Plasmaspektrometers (ICP) mit einer neuen Apparatur zur elektrothermischen Verdampfung konnte der Gehalt an metallischem Calcium in niedrig legiertem, calciumbehandeltem Stahl bestimmt werden. Die kontrollierte Erwärmung von Stahlspänen auf 2 000°C führt zur vollständigen Verdampfung des elementaren Calciums, während das chemisch gebundene Calcium bei dieser Temperatur nicht verdampft. Das verdampfte Calcium wurde mit Argon in das Plasmaspektrometer transportiert, und das erzeugte Emissionsspektrum wurde zur quantitativen Auswertung genutzt.
ISSN:0003-8962
DOI:10.1002/srin.199000314
出版商:Wiley
年代:2016
数据来源: WILEY
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7. |
ECSC announcements |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 120-120
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PDF (95KB)
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ISSN:0003-8962
DOI:10.1002/srin.199000315
出版商:Wiley
年代:2016
数据来源: WILEY
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8. |
Determination of nitrogen and carbon interstitially dissolved in continuously‐annealed steel sheets by means of a fully automatic torsion pendulum |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 121-130
Gerhard Borst,
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摘要:
A fully automatic torsion pendulum of the Collette type was built to test continuously‐annealed steels in the thickness range between 0.15 and 0.4 mm for their contents of dissolved nitrogen and carbon. The influence of composition and production conditions on unalloyed steels which had been annealed commercially and in the laboratory were investigated. It was found that, with an increase in the total carbon and aluminium contents, the percentages of the dissolved nitrogen and carbon decrease, whereas higher nitrogen contents resulted in an increase of the percentages dissolved. A higher coiling temperature of the hot band leads to a decrease in the nitrogen dissolved due to the formation of AIN, but to an increase of the carbon dissolved. As these effects almost compensate each other, the coiling temperature is not a suitable means to influence the aging potential. During the continuous annealing process, temperatures of more than 750°C result in a decrease of the nitrogen dissolved, which is completely precipitated as AIN leaving the carbon content nearly unaffected. No major differences were observed, when the material was annealed either with or without a subsequent overaging treatment. However, rapid cooling to low temperatures definitely increased the percentages of elements dissolved.
ISSN:0003-8962
DOI:10.1002/srin.199000316
出版商:Wiley
年代:2016
数据来源: WILEY
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9. |
Effect of intercritical temperature and cold‐deformation on the kinetics of austenite formation during the intercritical annealing of dual‐phase steels |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 131-135
Ismail A. El‐Sesy,
Hans‐Joachim Klaar,
Abdel‐Hamid A. Hussein,
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摘要:
The objective of this investigation was to study the effect of the intercritical temperature and percentage of cold‐deformation on the kinetics auf austenite formation during the intercritical annealing in the alpha + gammy (α + γ) phase field of the iron‐carbon phase diagram. This investigation was carried out on an Fe–0.11 C–1.58Mn–0.4 Si ferritic‐pearlitic alloy with different structures of 0% (hot‐rolled), 25% and 50% cold‐deformation. The intercritical annealing temperatures were 735, 750°C and the intercritical annealing time ranged from 15 to 1815 s. It has been observed that recrystallization of the deformed ferrite was completed before any austenite formation. Surprisingly, it was noted that the recrystallized ferrite grain size was independent of percentage cold‐deformation. Furthermore, it was expected that cold‐deformation accelerates the kinetics of austenite formation. Nevertheless, the amounts of austenite formed from pearlite dissolution were mostly equal, irrespective of the starting condition. As has been previously reported, increasing the intercritical annealing temperature was found to increase the amount of austenite.
ISSN:0003-8962
DOI:10.1002/srin.199000317
出版商:Wiley
年代:2016
数据来源: WILEY
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10. |
ECSC announcements |
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Archiv für das Eisenhüttenwesen,
Volume 61,
Issue 3,
2016,
Page 135-135
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PDF (109KB)
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ISSN:0003-8962
DOI:10.1002/srin.199000318
出版商:Wiley
年代:2016
数据来源: WILEY
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