Tetsu-to-Hagané
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1883-2954
PRINT ISSN: 0021-1575

Tetsu-to-Hagané Vol. 55 (1969), No. 10

  • 随想

    pp. 865-866

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
  • Theoretical Analyses on the High Pressure Operation and Oxygen Enriched Operation of Blast Furnace

    pp. 867-876

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    Mathematical models are proposed for analizing blast furnace preformance.
    High pressure operation and oxygen enriched operation are studied with the proposed models. The production rate and the fuel ratio predicted from the models agreed very well with the operation data. Also, possibility of predicting production limit is discussed.
  • Kinetics of Nitrogen Removal from Liquid Iron

    pp. 877-886

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    The rate of nitrogen removal from liquid iron containing oxygen has beenstudied by blowing Argas onto the inductively stirred liquid iron at I600°C.
    At constant oxygen content, the rate of nitrogen removal is proportional tothe second power of the concentration of nitrogen in liquid iron. The rate is retarded markedly with increasing oxygen content. The rate constant κ(cm/wt%. sec) is inversely proportional to the concentration of oxygen contents ([%O]>0.01%), but at lower contents of oxygen the rate constant tends to approach a con-stant value.
    It is shown that the removal of nitrogen is controlled by the chemical reaction rate. The results are
  • On the Behavior of the Oxide Inclusions of System MnO-Si02-Al2O3 in Steels during Hot-rolling, and their Influence on Tensile Strength of the Steels

    pp. 887-900

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    The oxide inclusions in commercial steels consist mainly of the simple orthe complex oxides formed from the system MnO-SiO2-Al2O3.
    In the present investigations, the behavior of those oxide inclusions in steels during hot-rolling was observed by the same procedures as used for our previous work: that is, the steel specimens containing uniformly a certain amount of those oxide inclusions were prepared by powder metallurgy technique. These steel specimens were hot-rolled under the following conditions: the rolling temperatures were 1250-1000°C and 1000-800°C, the rolling ratio was 1/5. Then, changes of inclusions in shape, composition and crystallographic structure during hot-rolling were examined. The tensile tests of rolled steel specimens in the rolling direction were carried out to examine the influence of those inclusions on tensile strength of the steels.
    The main results were as follows:
    (I) The complex inclusions having nearly the same melting or softening points as the rolling temperature, were deformed plastically and turned into the stringer type. When both the rolling temperature and ratio are maintained to constant, the lower the melting point of inclusion and the better the homogeneity in composition of inclusion are, the larger the degree of deformation of inclusion becomes.
    (2) The complex inclusions formed from the system MnO-SiO2, having low melting points were softened at 1000°C.
    (3) When the steel specimens coexisting MnO and SiO2 of simple oxide inclusions were rolled between 1250°C and 1000°C, both inclusions were consolidated, tusned into manganese silicates whose melting points were lower, and deformed plastically. Those manganese silicates were partly crystallized into tephroite (2MnO.SiO2).
    (4) Those oxide inclusions in steels affected scarecely tensile strength of steels.
    x

    Readers Who Read This Article Also Read

    1. On the Deoxidation of Liquid Iron with Argon-Calcium Bubbles Tetsu-to-Hagané Vol.56(1970), No.8
    2. Some Consideration on the Mechanism of Deoxidation Reaction of Molten Steel Tetsu-to-Hagané Vol.51(1965), No.7
    3. Reaction between Fe-Mn Alloy and Synthetic Oxide at High Temperatures Tetsu-to-Hagané Vol.54(1968), No.2
  • Study on Development of High Mn Austenitic Heat Resisting Steel

    pp. 901-915

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    High Mn austenitic stainless steel has been developed for high temperature applications especially for boiler tubes. The most suitable chemical composition has been found to be 18%Cr-6%Ni-8%Mn, the structure this steel is almost wholly austenitic and its properties of creep-rupture strength, resistance to oxidation at elevated temperature and hot workability are comparable to those of type 304 steel.
    Small amounts of Ti and Nb have been added simultaneously to this type of steel (being called 18-6-8Ti Nb steel) to improve the elevated temperature strength. The carbon content being about 0.2%, the optimum amounts of Ti and Nb have been found to be the atomic ratio of (Ti+Nb)/C being in the range of 0.1 to 0.5. The resultant steel has considerably high creep-rupture strength in the temperature 600 to 700°C, and is believed to be very economical steel for high temperature applications.
    The mechanism of raising the creep-rupture strength due to the additions of Ti and Nb is considered to be to depress the coalescence of M23C6 carbides in the grains and on the grain boundaries and to make the carbides dispersing very finely within the grains during its use at high temperature. This mechanism is seemed to be the same as in the case of 18%Cr-10%Ni austenitic steel.
  • On the Evaluation of Steel Quality by Non-destructive Testing Technique

    pp. 916-931

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
  • The 2nd Report of Comparative High Temperature Tensile Testing of Steels

    pp. 932-945

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    x

    Readers Who Read This Article Also Read

    1. 表面処理・その他 Tetsu-to-Hagané Vol.52(1966), No.11
    2. Kinetic Study of the Decarburization of Liquid Iron Tetsu-to-Hagané Vol.52(1966), No.12
    3. II 連続鋳造の凝固について Tetsu-to-Hagané Vol.56(1970), No.4
  • 抄録

    pp. 946-955

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

Article Access Ranking

02 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2021 ISIJ International Vol.62(2022), No.6
  2. Role of Interfacial Properties in the Evolution of Non-metallic Inclusions in Liquid Steel ISIJ International Advance Publication
  3. Preface to the Special Issue on “Frontier in Characterization of Materials and Processes for Steel Manufacturing” ISIJ International Vol.62(2022), No.5
  4. Hierarchical Deformation Heterogeneity during Lüders Band Propagation in an Fe-5Mn-0.1C Medium Mn Steel Clarified through in situ Scanning Electron Microscopy ISIJ International Advance Publication
  5. Reduction of CO2 Emissions from Blast Furnace Applying Reactive Coke Agglomerate and Hydrogen Reduction Tetsu-to-Hagané Vol.108(2022), No.6
  6. Wettability of Molten Fe–Al Alloys against Oxide Substrates with Various SiO2 Activity ISIJ International Advance Publication
  7. Application of Heat Transfer Coefficient Estimation Using Data Assimilation and a 1-D Solidification Model to 3-D Solidification Simulation ISIJ International Advance Publication
  8. Comparison of Oxidation Behavior of Various Reactive Elements in Alloys during Electroslag Remelting (ESR) Process: An Overview ISIJ International Advance Publication
  9. Nitrogen Solubility and Gas Nitriding Kinetics in Fe–Cr–Mo–C Alloy Melts under Pressurized Atmosphere ISIJ International Vol.62(2022), No.6
  10. Influence of Al2O3/SiO2 and BaO/Al2O3 Ratios on Rheological and Crystallization Behavior of CaO–BaO–Al2O3-Based Mold Slags ISIJ International Vol.62(2022), No.6

Search Phrase Ranking

02 Jul. (Last 30 Days)

  1. blast furnace
  2. inorganic coating corrosion
  3. blast furnace permeability
  4. blast furnace productivity
  5. chromate free coating
  6. si-killed spring steel
  7. steel
  8. 鉄と鋼
  9. a
  10. aaa