Steel Science Portal

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

Grid List Abstracts

ONLINE ISSN: 1883-2954
PRINT ISSN: 0021-1575

Tetsu-to-Hagané Vol. 59 (1973), No. 10

  • 鉄鋼製錬工学の課題

    館 充

    pp. 1371-1372

    Bookmark

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

    Log in / Sign Up

  • Evaporation Rate of Single Water Droplet on Hot Solid Surface

    Akira MORIYAMA

    pp. 1373-1379

    Bookmark

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

    Log in / Sign Up

    Abstract

    Evaporation rate of single water droplet on hot solid surface was studied.
    Theoretical rate equation was derived on the assumption that the evaporation rate of bottom part of the droplet is controlled by heat transfer through vapour film and that of upper surface of the droplet by mass transfer.
    According to this theory, the evaporation rate of upper surface of the droplet is given as a function of its volume while that of bottom part is proportional to 0.7 power of its volume. It is reasonable to neglect the inertial contribution to the flow through vapour channel between the bottom and the surface of solid at least below 800°C of the surface temperature of solid.

  • Effect of Oxygen on the Wettability of Solid Oxide with Molten Iron

    Kazumi OGINO, Kiyoshi NOGI, Yukio KOSHIDA

    pp. 1380-1387

    Bookmark

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

    Log in / Sign Up

    Abstract

    By using the sessilc drop method, the wettability of solid oxide (sintered alumina and saphire) with molten iron was measured at 1600°C in atmosphere which had various oxygen potentials. The solidified metal-oxide interface was observed with optical microscope and EPMA.
    The main results are as follows;
    (1) The surface tension and contact angle of molten iron on alumina decrease with increasing of oxygen content in the metal.
    (2) The work of adhesion increascs with increase of oxygen content.
    (3) Iron diffuses into the grain-boundary of sintered alumina.

    Recommended Articles: Effect of the Steelmaking and Continuously-Casting Conditions on Non-Metallic Inclusion of the Steel For Cold Rolled Sheet [ View more ]

    x

    Readers Who Read This Article Also Read

    1. Effect of the Steelmaking and Continuously-Casting Conditions on Non-Metallic Inclusion of the Steel For Cold Rolled Sheet Tetsu-to-Hagané Vol.60(1974), No.9
    2. Deoxidation of Continuously-Cast Low-Carbon Steel for Cold-Sheet Tetsu-to-Hagané Vol.60(1974), No.9
    3. Kinetic Study of Dephosphorization of Liquid Iron with Oxidizing Slag Tetsu-to-Hagané Vol.58(1972), No.9

  • The Effects of Structural Change during Aging and Austenite Grain Size on the Tensile Properties of 18 Ni Maraging Steel

    Yoshikuni KAWABE, Masao KANAO, Seiichi MUNEKI

    pp. 1388-1399

    Bookmark

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

    Log in / Sign Up

    Abstract

    A study has been made of the effects of structural change during aging, the prior austenitic grain size and titanium addition on the tensile properties with special reference to tensile ductility of 18Ni maraging steel. The precipitation process from lath-martensitic structure to maraged structure of several stages up to overaged structure has been analyzed by using Arrhenius plots of aging hardness. The relationships between the aged structure and tensile properties have been determined.
    The results are summarized as follows:
    1) Uniform elongation increases markedly at an early stage of aging and also in overaged stage. This phenomenon is attributable to the increase of work hardening caused by the change of deformation made at former stage and γ precipitation at later stage respectively. Uniform elongation is almost independent on the prior austenite grain size.
    2) Local elongation and reduction of area decrease monotonously with increasing aging time, and show a marked decrease in overaged structure. These detrimental effects are more pronounced when the prior austenite grain size is larger and no titanium is added.
    3) The detrimental effects exhibited in overaged stage are due to the increase of void nucleation sites and increase of tendency to rupture along the prior austenite grain boundaries.
    4) The improvement of local elongation and reduction of area by titanium addition is due to the suppression of the rupture at the prior austenite grain boundaries.

  • Effect of Titanium on the Behavior of Carbon in α-iron

    Hideaki SUZUKI, Tadahisa NAKAMURA

    pp. 1400-1406

    Bookmark

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

    Log in / Sign Up

    Abstract

    Internal friction and strain aging were studied in carburized Fe-0.5 at %Ti alloys. The carburized specimens were heated at 720°C in herium of 1atm and quenched. The Snoek damping was found to occur by the same single relaxation process as that of Fe-C alloy system, and the influence of texture, grain boundaries, cementite and magneto-mechanical damping on the relaxation strength were discussed. Strain aging was done at 15°C for 2 minutes under the unloaded and loaded condition.
    The change of the height of Snoek damping (Q-1max) and the stress increment by Snoek ordering (ΔY) with carbon content in the alloy were distinguished into three regions and discussed.
    It was found that in the region from zero to 0.12 wt% carbon and ΔY were zero, this indicating that titanium strongly binds carbon, from 0.12 to 0.15 wt% carbon Q-1max and ΔY in- creased linearly with carbon concentration, which suggests that carbon dissolves into crystal lattice, and exceeding 0.15 wt% of carbon Q-1max and ΔY decreased with carbon content, which illustrates that cementite precipitation occurs.
    It was concluded that titanium atom and carbon atom combined by the atomic ratio of 1 to 1 and that the solubility of carbon increased by 7.5 times due to the addition of 0.5 at %Ti at 720°C.

  • The Deterioration of Molten Salt Bath for Electrolytic Boronizing and its Countermeasure

    Kaneyoshi KUSUNOKI, Kyozo TORII, Tatsumi ASAKURA, Noboru KOMATSU, Tohru ARAI, Yoshihiko SUGIMOTO

    pp. 1407-1417

    Bookmark

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

    Log in / Sign Up

    Abstract

    It is well known that the electrolytic boronizing is, for industrial purposes, more advantageous than other boronizing processes such as gas, pack, and salt bath processes. There is one problem in this process, however, that the boride layer tends to become less thick in a given time of processing with the repetitive use of molten borax (Na2B4O7) bath in a heat-resisting steel pot.
    In this study the cause of the deterioration of the molten salt bath were investigated and the methods to prevent it were established.
    The results obtained are summarized as follows:
    (1) The deterioration of the molten salt bath for electrolytic boronizing is considered to be due to the dissolution of iron into the bath from heat-resisting steel pot.
    (2) It is found that the deterioration can be effectively prevented by providing the passage of electric current through the bath to the pot which is to be a cathode. This method is a sort of cathodic protection.
    (3) The deterioration can be considerably reduced by the addition of ZrO2 or MgO to the bath.
    (4) The boronizing power can be restored by the removal of the iron-rich slag on the bath surface formed by the addition of a small amount of Ca, Mg, Al, Si, Zr, Ti or others into the deteriorated bath.

  • Apparatus for Measurement of Deformation-CCT Curves and Its Applications

    Shozo SEKINO, Naomichi MORI, Shinogu TAMUKAI

    pp. 1418-1424

    Bookmark

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

    Log in / Sign Up

    Abstract

    An apparatus has been devised with which the transformation processes can be dilatometrically measured after compressive straining. With this apparatus, the deformation CCT curves can be drawn, and also the recrystallization process of austenite can be studied.
    The deformation CCT curves were drawn for a 60kg/mm2 class high tensile steel. By deformation, ferritic and bainitic transformations shifted the higher temperature and shorter time region. Ferritic transformation started along γ grain boundaries. In general, when a specimen with deformed γ grains was quenched, the micro-structure became finer and the hardness also higher.
    Recrystallization of deformed γ grains was studied by the use of an 80kg/mm2 class high tensile steel. When the degree of deformation was high, many γ grains originated along the prior γ grain boundaries and fine γ grains resulted. When the degree of deformation was low, the recrystallization was not clear, and the extraordinary grain growth occurred.

    Recommended Articles: Effect of Retained Austenite on Deep Drawability in 1000MPa Grade High Shrength Steel Sheets [ View more ]

    x

    Readers Who Read This Article Also Read

    1. Effect of Retained Austenite on Deep Drawability in 1000MPa Grade High Shrength Steel Sheets Tetsu-to-Hagané Vol.79(1993), No.2
    2. Initial Stages of Recrystallization in Aluminum Killed Steel Sheets as Observed by Transmission Electron Microscopy Tetsu-to-Hagané Vol.59(1973), No.2
    3. Development of Hot-strip Crownmeter Using γ-ray Tetsu-to-Hagané Vol.59(1973), No.5

  • Fractionating Determination of Micro-amounts of Stannous Sulfide and Ferrous Sulfide on the Surface of Tin-plate by the Spectrophotometric Method

    Toshihiko HATA, Yoshihisa KONO, Kiyoshi SUMI

    pp. 1425-1431

    Bookmark

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

    Log in / Sign Up

    Abstract

    This paper describes an analytical method for the fractionating determination of stannous sulfide and ferrous sulfide formed on the surface of some tinplates…the tinplate treated by dipping in potassium polysulfide solution and the inner face of the can of foods containing sulfide. The method is based on the difference in solubility between the sulfide and iron matrix in an dilute hydrochloric acid solution. The outline of procedure is as follows:
    To dissolve all the sulfide on the surface, sample fixed in the special dissolving vessel made of acrylic acid resin is treated with 20ml of 4N hydrochloric acid at room temperature for 20 minutes under the passing of nitrogen gas. Evolved hydrogen sulfide is absorbed in zinc acetate solution and sulfur as sulfide is determined by the methylene-blue spectrophotometric method. Then, iron in the solution is determined by the o-phenanthroline spectrophotometric method. The micro-amounts of stannous sulfide and ferrous sulfide on the surface of the sample are calculated from these analytical values.
    By this method, several samples were analysed and the satisfactory results were obtained.

  • Present Situation and Future of Wire and Wire Rods Utilization

    Kokichi ASADA

    pp. 1432-1467

    Bookmark

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

    Log in / Sign Up

  • Steel Construction of Buildings

    Takeo NAKA

    pp. 1468-1474

    Bookmark

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

    Log in / Sign Up

    Recommended Articles: Chemical State Analysis of Copper Corrosion Products Including Patina by Voltammetry [ View more ]

    x

    Readers Who Read This Article Also Read

    1. Chemical State Analysis of Copper Corrosion Products Including Patina by Voltammetry Zairyo-to-Kankyo Vol.64(2015), No.11
    2. An Investigation of Application of Atomic Heat Energy to Blast Furnace Process, Stressed on Hot Reformed Gas Injection into Furnace Stack Tetsu-to-Hagané Vol.56(1970), No.7
    3. R & D of the Reactive Paint Coating for Corrosion Protection by Controlling Rust on Steel Zairyo-to-Kankyo Vol.66(2017), No.1

  • 抄録

    pp. 1475-1481

    Bookmark

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

    Log in / Sign Up
  • © 1973 The Iron and Steel Institute of Japan

Article Access Ranking

30 Sep. (Last 30 Days)

  1. Recent Progress of Instrumentation Technology for Process Automation in Steel Industry Tetsu-to-Hagané Vol.106(2020), No.9
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Accuracy Improvement of the XRD-Rietveld Method for the Quantification of Crystalline Phases in Iron Sintered Ores through the Correction of Micro-absorption Effects ISIJ International Advance Publication
  4. Melting Erosion Failure Mechanism of Tuyere in Blast Furnace ISIJ International Advance Publication
  5. Mechanism of Corrosion Protection at Cut Edge of Zn-11%Al-3%Mg-0.2%Si Coated Steel Sheets ISIJ International Vol.60(2020), No.9
  6. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Advance Publication
  7. Evaluation and Prediction of Blast Furnace Status Based on Big Data Platform of Ironmaking and Data Mining ISIJ International Advance Publication
  8. Potential Influences of Impurities on Properties of Recycled Carbon Steel ISIJ International Advance Publication
  9. Composition Changes of Inclusions by Reaction with Slag and Refractory: A Review ISIJ International Vol.60(2020), No.9
  10. Optimization Analysis of Mechanical Performance of Copper Stave with Special-shaped Tubes in the Blast Furnace Bosh ISIJ International Advance Publication

Search Phrase Ranking

30 Sep. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. ultrasonic testing bar small diameter
  5. jeong-sik kim
  6. ultrasonic inclusion
  7. isij international
  8. 柳修介
  9. continuous casting of copper alloys
  10. tetsu