1. |
News from the Max‐Planck‐Institut für Eisenforschung GmbH |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 228-228
Preview
|
PDF (102KB)
|
|
ISSN:0003-8962
DOI:10.1002/srin.199301013
出版商:Wiley
年代:2016
数据来源: WILEY
|
2. |
Mixing enthalpies and calorimetric investigations of liquid iron‐vanadium alloys |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 229-231
Klaus Schaefers,
Jianping Qin,
Martin G. Frohberg,
Preview
|
PDF (276KB)
|
|
摘要:
By means of a special levitation alloying calorimeter (LAC) the mixing enthalpies of liquid Fe‐V alloys were determined in the iron rich range, up to 35 at.% V at a mean temperature of 1990 K; in the vanadium rich range, up to 32 at.% Fe at a mean temperature of 2320 K. The results were verified by a drop calorimetric experiment, where the enthalpy of an Fe‐V alloy with 69 at.% Fe was measured. The total systematic error of the LAC was calculated to be within ± 10 %. Different thermodynamic models were applied to describe the results. By the quasi‐chemical model the experimental results for the mixing enthalpies in kJ/mol are expressed by the equation ΔHm=xFexV(−28.61–80.58xFexV).
ISSN:0003-8962
DOI:10.1002/srin.199301014
出版商:Wiley
年代:2016
数据来源: WILEY
|
3. |
Effect of titania on the characteristics of blast furnace slags |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 232-238
Kanyakumari Datta,
Paresh Kumar Sen,
Shyam Sunder Gupta,
Amit Chatterjee,
Preview
|
PDF (717KB)
|
|
摘要:
The objective of this study was to understand the effect of 1 – 2 % titania on the high‐temperature properties of blast furnace slags containing high alumina and magnesium oxide. The viscosity and liquidus temperature of semi‐synthetic blast furnace slags were measured using a viscometer and a hot stage microscope, respectively, and the data were used to develop a statistical model for predicting the liquidus temperature and viscosity of blast furnace slags. Samples of the titanium bearing accretions were collected during tearing‐out of the hearths of Tata Steel's blown‐out D and E blast furnaces. They were subjected to various physico‐chemical analyses (e.g. chemical, XRD, optical microscopy, SEM and image analysis) in order to understand the mechanism of hearth protection. In the range of composition studied, the liquidus temperature is found to lie between 1365 to 1430°C and the viscosity, between 0.30 to 0.60 Pa · s. Increase in titania fluidizes the slag and also makes it easy‐melting. The titanium bearing compounds in the slag show traces of TiC, TiN, Ti2N, TiO, Ti2O3, Ti3O5and Ti5O9. A mechanism of formation of these precipitates is proposed in this paper.
ISSN:0003-8962
DOI:10.1002/srin.199301015
出版商:Wiley
年代:2016
数据来源: WILEY
|
4. |
Structural statements, coordination numbers and water vapour solubility in aluminate slags |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 239-245
Klaus Mausbach,
Norbert Nowack,
Franz Schlegelmilch,
Preview
|
PDF (583KB)
|
|
摘要:
The IR emission of liquid CaO‐Al2O3slags is caused by IR active molecule vibrations ofand‐complexes. In the liquid CaO‐Al2O3slags the equilibriumdominates. At lower temperatures (1000°C) the formation of condensed‐complexes was observed (glassy state). By the addition of B2O3to CaO‐Al2O3slags B‐O‐Al associations were formed. Since the emission bands of the aluminate complexes overlap, a curve fitting with Gaussian functions was carried out to separate the bands. Furthermore, this quantitative evaluation leads to statements concerning the ratios between the different molecules. With the increase in temperature these associations are dissociated. In CaF2‐CaO‐Al2O3slags with higher contents of CaF2, Al‐O‐F complexes with the coordination number 4 are present. Water vapour is dissoluted in liquid CaO‐Al2O3as hydroxide‐ions (diffuse IR‐emission‐spectrum of−O‐H−…O2−‐molecule units).
ISSN:0003-8962
DOI:10.1002/srin.199301016
出版商:Wiley
年代:2016
数据来源: WILEY
|
5. |
Coupled thermal and stress‐strain models for the continuous casting of steels |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 246-254
Günter Funk,
Jürgen R. Böhmer,
Franz N. Fett,
Robert Hentrich,
Preview
|
PDF (940KB)
|
|
摘要:
During the continuous casting of steel thermo‐mechanical loadings may cause defects of the strand shell when exceeding the temperature‐dependent material strength. Primary cause is the interplay of temperature level, and temperature gradients within the strand shell, the change of material properties, and further mechanical loadings of the strand shell like compression and friction forces or the ferrostatic pressure of the liquid. A model system has been developed to calculate the temperature distribution during continuous casting of steel and the resulting probability of hot crack formation, due to the thermo‐mechanical loadings.First part is a thermal model to calculate the three‐dimensional transient temperature field. In a reduced form this model can describe two‐dimensional transient and, with less effort, two‐dimensional steady‐state problems.For the calculation of stresses and displacements a model based on a simple plane strain formulation, and a model using the fully three‐dimensional stress‐formulation are shown. Because material behaviour and temperature field are interdependent, thermal and mechanical models have to be coupled depending on the problems to be solved. Strategies for a problem‐specific model coupling are discussed. Finally, the applicability of the model system is shown by some example problems from operational practice.
ISSN:0003-8962
DOI:10.1002/srin.199301017
出版商:Wiley
年代:2016
数据来源: WILEY
|
6. |
Sheet bending and determination off residual stresses by means of FEM |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 255-261
Robert Schilling,
Preview
|
PDF (660KB)
|
|
摘要:
The simulation of metal forming processes with the finite element method (FEM) in the sense of a “numerical experiment” is gaining more and more importance. Bending of FeP04 (St1403), × 5 CrNi 189 and AIMgSi1 sheets in V‐ and U‐shaped dies prove the quality of this type of calculation. Of particular interest here is the determination of punch forces, strains and stresses in the workpiece. The calculation of residual stresses is important for process optimisation. Comparisons between calculated and experimentally determined results indicate the calculation qualities.There are many possibilities of influencing the simulation quality of residual stress calculations. In particular, the material model has to be optimally selected. Two combined isotropic‐kinematic hardening models (from Axelsson/Samuelsson and McNamara/Sharma) implemented in the FE program to take the Bauschinger effect into consideration point out the influence of material models on the calculated residual stresses.
ISSN:0003-8962
DOI:10.1002/srin.199301018
出版商:Wiley
年代:2016
数据来源: WILEY
|
7. |
ECSC announcements |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 261-261
Preview
|
PDF (96KB)
|
|
ISSN:0003-8962
DOI:10.1002/srin.199301019
出版商:Wiley
年代:2016
数据来源: WILEY
|
8. |
Influence of intercritical annealing on the texture formation in low‐carbon steel strips |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 262-266
Christian Klinkenberg,
Dierk Raabe,
Kurt Lücke,
Preview
|
PDF (561KB)
|
|
摘要:
Cold rolled low carbon steels are often recrystallized in continuous annealing lines. This procedure is accompanied by partial austenitization. Up to 40 % phase transformation the {111} texture is enhanced, whereas at higher austenitization grades this texture is weakened. The underlying mechanisms of texture formation by phase transformation are investigated by means of quantitative texture analysis.
ISSN:0003-8962
DOI:10.1002/srin.199301020
出版商:Wiley
年代:2016
数据来源: WILEY
|
9. |
Influence of Mn and Si contents on structure and mechanical properties of ferritic‐pearlitic HSLA steels |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 267-274
Johannes Richter,
Albert Güth,
Alfred Köthe,
Günter Backmann,
Preview
|
PDF (1113KB)
|
|
摘要:
Laboratory melts of microalloyed low carbon steels with an increased silicon content of about 1 % and manganese contents between 0.3 and 1.3 % were thermomechanically rolled in a laboratory two‐high rolling stand to plates of about 10 mm in thickness. The influence of chemical composition and finish rolling temperature (FRT) on the ferrite‐pearlite structure of the plates (tensile and Charpy impact tests) was investigated. The choice of the temperature range of finish rolling with respect to the γ/α transformation start temperature strongly influences the ferrite‐pearlite structure and the mechanical properties. The most fine‐grained and homogeneous ferrite‐pearlite structure and the best combination of strength and toughness have been obtained with steels containing about 1 % Mn and 1 % Si rolled with a finish rolling temperature of about 850°C.
ISSN:0003-8962
DOI:10.1002/srin.199301021
出版商:Wiley
年代:2016
数据来源: WILEY
|
10. |
News from the Max‐Planck‐Institut für Eisenforschung GmbH: Transformation of steels during cooling |
|
Archiv für das Eisenhüttenwesen,
Volume 64,
Issue 5,
2016,
Page 275-278
Preview
|
PDF (416KB)
|
|
ISSN:0003-8962
DOI:10.1002/srin.199301022
出版商:Wiley
年代:2016
数据来源: WILEY
|