Journal of High Pressure Institute of Japan
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
Search
Advanced search
OR
Browse
Search
Volume 32, Issue 1
Displaying 1-7 of 7 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Influences of Nb and C Content on Creep Rupture Strength of a 9Cr-1 Mo-V-Nb Steel with Simulated HAZ Heating
    Yasuo OTOGURO, Isao ITOH, Tohru OHTA, Shunran SUH, Hiroshi SAKAMOTO
    1994 Volume 32 Issue 1 Pages 4-12
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.4
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Creep rupture strength and microstructure were investigated for base metals and synthetic HAZ specimens of 9Cr-1Mo-V-Nb steels with two levels of Nb and C content respectively.
    Results obtained were as followed.
    (1) Creep rupture strength of the synthetic HAZ specimens which were heated to the peak temperature of 900 and 1000°C was lower than that of the base metals.
    (2) The difference in creep rupture strength of 103h at 650°C between the base metals and the syntheic HAZ specimens was minimum for the steel with 0.06% C and 0.05% Nb and was maximum for the steel with 0.10% C and 0. 05% Nb.
    (3) Microstructure was tempered martensite for all specimens. Grain size of the synthetic HAZ specimens was much smaller than that of the base metal.
    (4) Main precipitates were M7C3 and M23C6 and the latter carbide increased during aging at 650°C.
    Amount of the precipitates was smaller in the synthetic HAZ specimens than in the base metals.
    (5) Decrement in creep rupture strength of the synthetic HAZ specimen seemed to be caused mainly by grain refinement of the matrix, coarsening of the carbides, and smaller amount of precipitates compared to the base metals.
    View full abstract
    Download PDF (3742K)
  • Effect of Cold Work on Fracture Toughness
    Hiroshi MIMURA, Tomoyuki TADA
    1994 Volume 32 Issue 1 Pages 13-18
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.13
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A study was made on effect of cold work on fracture characteristics in steels of 50kg/mm2 strength by using COD test for crack initiation, press-notched Charpy test for arrest of crack propagation and V-notched Charpy test for reference.
    The results are summarized as follows.
    (1) It was shown to be quite probable that the press-notched Charpy test gives a good measure for crack arrestability in steels.
    (2) Cold work gave much more shift of the transition temperature in the critical COD and less shift of that in the fracture appearance of press-noched Charpy test than that of V-notched Charpy test.
    (3) It may be concluded from the COD and press-notched Charpy test results that cold work gives deterioration much to crack initiation characteristics and less to crack arrestability.
    View full abstract
    Download PDF (627K)
  • A Magnetographic Inspection System for Detecting Surface-breaking Flaws and Flaws under coated Layers in Steel Components
    Kazuyoshi SEKINE, Yaobang Zhang, Toru UEHARA
    1994 Volume 32 Issue 1 Pages 19-26
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.19
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A magnetographic inspection system has been developed for detecting and evaluating fine surface-breaking cracks and cracks under the coating layer. The system consists of the magnetic tape as recording medium of magnetic leakage field due to cracks and magnetic heads of the commercial VTR deck as the reading device of signals. With this inspection system, quantitative determination for size of various kinds of fine cracks or under-coating cracks in steel components has been done. An automatic technique for displaying the location, two-dimensitonal pattern and lengths of various kind of flaws are also presented.
    View full abstract
    Download PDF (820K)
  • Pressure Vessel and QFD
    Katsuyuki KAKEHI, Shou FUJINAMI
    1994 Volume 32 Issue 1 Pages 27-35
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.27
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This report is introduced the outline of QFD (Quality Function Deployment) suchas Quality deployment, Technical deployment, Cost deployment and Relaibilty deployment, the necessity of DR, necessity and connection of QFD for DR, and the example of application of QFD for a spherical pressure vessel.
    View full abstract
    Download PDF (1054K)
  • Introduction of New JIS Pressure Vessel Standards
    Hideo KOBAYASHI, Tsutomu ONOZAWA, Shozo YANAGIDA, Teruyoshi UDOGUCHI, ...
    1994 Volume 32 Issue 1 Pages 36-46
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.36
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The old Japanese standards for pressure vessels consisted of 2 principal standards, i. e. JIS B8243 “Construction of Pressure Vessels” and JIS B8250 “Alternative Standard for Construction of Pressure Vessels”. The former is socalled the conventional rule similar to the ASME B & PV CODE Sec. VIII. Div. I. The latter is the alternative rule employing the design concept of the ASME B & PV CODE Sec. VIII Div. 2. Besides the above principal standards, there were also other industrial standards respectively valid only for the individual products, which were, however, required nowadays from all industrial quarters concerned to be readjusted into one systematic standard.
    The JIS Pressure Vessels Sub-Committee provided the draft of the new systematic standard, in order to cope with the recent technical advantage and increase of the international trade. The new Japanese standards for pressure vessels consist of a general standard and 15 individual standards, and issued in March 15, 1993. Hereunder the authors introduce briefly the abstract of the new systematic standard.
    View full abstract
    Download PDF (1291K)
  • Engineering Guide Line of High Strength Pressure Vessel Cr-Mo Steels for High Temperature Service (Part 3)
    Welding Procedure and Properties of Welds
    Michio INAGAKI, Syogo NATSUME
    1994 Volume 32 Issue 1 Pages 47-54
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.47
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In response to development of high strength Cr-Mo Steels, welding consumables for these steels have been developed. Especially, welding consumables for Mod. 3Cr-1Mo steel and Enh. 21/4Cr-1Mo Steel have been used practically.
    As for welding consumables for Mod. 21/4Cr-1Mo Steel, these have been estimated for practical use and ASME CODE CASE has been under review. This paper shows some notes on usage of welding consumables for high strength Cr-Mo steels, especially about importance of controlling postweld heat treatment condition. Also, it provides mechanical properties of the welds that ECM-committee of lron and steel Div. The Japan Welding Engineering Society ordered manufacturers to submit and be discussed.
    View full abstract
    Download PDF (722K)
  • [title in Japanese]
    Tsutomu ONOZAWA
    1994 Volume 32 Issue 1 Pages 55-61
    Published: January 25, 1994
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.32.55
    JOURNAL FREE ACCESS
    Download PDF (768K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top