1. |
Research at Thyssen Stahl AG, Duisburg, Part 6: Fabrication Technology Department |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 1-7
Christian Straßburger,
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ISSN:0003-8962
DOI:10.1002/srin.198701479
出版商:Wiley
年代:2016
数据来源: WILEY
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2. |
Index of Publication |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 7-9
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PDF (254KB)
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ISSN:0003-8962
DOI:10.1002/srin.198701476
出版商:Wiley
年代:2016
数据来源: WILEY
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3. |
Das Gleichgewicht zwischen Wasserstoff und Stahl bei Raumtemperatur |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 8-12
Gerwig Vibrans,
Paul Wollschläger,
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摘要:
Es wurde die Gleichgewichtskonzentration von Wasserstoff in drei Stahlsorten unter bekannten Gasdrucken (50 bis 500 bar) gemessen. Die Vergütungsstähle 34 CrMo 4 und 34 CrNiMo 6 wurden im vergüteten und im normalisierten Zustand bei 4 Umformgraden (0 bis 1) untersucht. Ein sulfidhaltiger Stahl (9 SMn 28) wurde im kaltgezogenen und im geglühten Zustand untersucht.Die vergüteten Stähle nahmen in allen untersuchten Fällen den Wasserstoff nur in atomarer Form auf. Bei normalisierten Vergütungsstählen entstanden beim Umformen auch Fallen, die molekularen Wasserstoff aufnehmen. Ihr Beitrag war aber gering, zum Teil verschwanden sie bei stärkerer Verformung wieder. Ein größerer Anteil molekularen Wasserstoffs, bis ca. 50%, wurde in dem sulfidhaltigen Stahl gefunden.
ISSN:0003-8962
DOI:10.1002/srin.198701480
出版商:Wiley
年代:2016
数据来源: WILEY
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4. |
Verfasserverzeichnis |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 10-16
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ISSN:0003-8962
DOI:10.1002/srin.198701477
出版商:Wiley
年代:2016
数据来源: WILEY
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5. |
Austenite stabilization in Cr 13% Ni 4–6% steels |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 13-17
Jiří Švejcar,
Jiřina Hubáčková,
Vladimir Číhal,
Karel Mazanec,
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摘要:
The present article deals with the study of the effects of concentration changes taking place in the matrix during partial austenitization of Cr 13% Ni 4–6% steel, while it is tempered, in the range of intercritical temperatures, on the structural stability of forming austenite. In the investigation, the authors made use of some special techniques of the potential polarization method and electron microanalysis. Some geometrical factors, such as the morphology and distribution of austenite areas were also studied.Increased austenite content in the matrix provides for an increased level of plastic properties and for improved technological characteristics. The stability of austenite areas depends on their morphology, distribution and, above all, on their dimensions ‐ their thickness should not exceed 0.15 to 0.20 μm. The increase in nickel content observed in these areas was as much as 100% compared with the nominal nickel content of this steel.
ISSN:0003-8962
DOI:10.1002/srin.198701481
出版商:Wiley
年代:2016
数据来源: WILEY
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6. |
Sachregister |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 16-18
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PDF (294KB)
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ISSN:0003-8962
DOI:10.1002/srin.198701478
出版商:Wiley
年代:2016
数据来源: WILEY
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7. |
A new nitrogen alloying technique ‐ a way to distinctly improve the properties of austenitic steel |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 18-25
Paul Pant,
Peter Dahlmann,
Wolfgang Schlump,
Gerald Stein,
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摘要:
The paper presents a new process for nitrogen alloying austenitic steels beyond solubility limit in a pressurized electroslag remelting furnace using Si3N4as nitrogen source. With the aid of this process it is possible to attain nitrogen percentages far beyond the solubility limit at atmospheric pressure. These high nitrogen contents impart a distinct improvement to the properties of the material.Yield strengthsRp0.2>600 N/mm2at ambient temperature are achieved. The high tensile values are attributable to the lattice expanding effect of force‐dissolved nitrogen. A reduction in forming characteristics A5and Z normally associated with a distinct increase in tensile strength is not noticeable. The tests at ambient temperature have further shown that nitrogen alloyed steels display high fatigue strength values. If results of the fatigue tests are evaluated on the basis of the empirical relation 0.30<σzdw/Rm<0.45 it is found that the values of the steels tested are generally at the upper limit of this value or even above it.The very good creep test results of nitrogen alloyed steels deserve emphasis. Up to 800°C they are comparable to the creep values of high temperature alloys. This is attributable to the precipitation behaviour of the steels caused by the presence of nitrogen. Embrittlement occurs only to a very small extent and precipitates, in particular Cr2N, enhance creep resistance owing to their favourable arrangement.The new technique of nitrogen alloying beyond the solubility limit opens up favourable opportunities for nitrogen alloyed austenitic steels in new applications. This development offers further advantages in that considerable savings in nickel as an alloying element can be made and that material can be much better utilized in the design of components.
ISSN:0003-8962
DOI:10.1002/srin.198701482
出版商:Wiley
年代:2016
数据来源: WILEY
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8. |
ECSC announcements |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 25-25
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ISSN:0003-8962
DOI:10.1002/srin.198701483
出版商:Wiley
年代:2016
数据来源: WILEY
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9. |
The stability behaviour of hard material coatings on alloyed steel substrates |
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Archiv für das Eisenhüttenwesen,
Volume 58,
Issue 1,
2016,
Page 26-32
Klaus Wetzig,
Gerd Gille,
Johannes Edelmann,
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摘要:
The stability behaviour of hard material coatings made by CVD on different alloyed and carbon steel substrates depends on the properties of both substrate and coating. SEM in‐situ investigations on the tension loaded surface of bended samples may be used to observe crack nucleation and growth in brittle hard material coatings such as TiC, TiCN on low alloyed and carbon steels. From the crack distance distributions some important parameters of mechanical stability such as the threshold value of fracture σth, the Weibull‐parameter β and the ratio of the strength distribution functionFand a characteristic lengthDmay be estimated. The threshold value for fracture in the coatings σthdecreases with increasing coating thickness for all steel‐coating combinations. The threshold value also decreases if a heat treatment is made on the steel‐coating system. This is due to the relaxation of the internal stress in the coating.The mean strength of the TiC‐coatings decreases and the strength variance (measured by the Weibull‐parameter β) increases with increasing coating thickness and therefore the mechanical stability of coatings decreases with growing thickness. The ratio of the strength distribution functionFand the characteristic distance between defectsDas a measure of crack density depends on the deformation behaviour of the steel as well as on the strength and the defect structure of the coating.
ISSN:0003-8962
DOI:10.1002/srin.198701484
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 58,
Issue 1,
2016,
Page 32-32
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PDF (97KB)
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ISSN:0003-8962
DOI:10.1002/srin.198701485
出版商:Wiley
年代:2016
数据来源: WILEY
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