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    • 7. 发明专利
    • HYDROGEN STORAGE NI-ZR SERIES ALLOY AND CLOSED-TYPE NI-HYDROGEN STORAGE BATTERY
    • JPH02263944A
    • 1990-10-26
    • JP27340489
    • 1989-10-20
    • MITSUBISHI METAL CORP
    • DOI HIDEKAZUYABUKI TATSUMORI
    • C22C19/00C22C19/03C22C30/00H01M4/24
    • PURPOSE:To obtain the hydrogen storage Ni-Zr series alloy having high hydrogen occluding and discharging capacity and low dissociation pressure of equilibrium hydrogen in the region of room temp. and having excellent alkali resistance at a low cost by specifying the compsn. constituted of Ti, Zr, Mn, W, Fe and Ni. CONSTITUTION:The hydrogen storage Ni-Zr series alloy has the compsn. contg., by weight, 5 to 20% Ti, 10 to 37% Zr, 5 to 30% Mn, 0.01 to 15% W and 1 to 30% Fe, furthermore contg., at need, one or both of 0.05 to 6% Cr and 0.01 to 5% Al and the balance Ni with inevitable impurities and has an MgZn2-type crystal structure, which shows excellent corrosion resistance and durability in an alkaline electrolytic soln., has high hydrogen occluding and discharging capacity and low dissociation pressure of equilibrium hydrogen in the region of room temp., has high hydrogen oxidizing capacity, is hard to pulverize, causes no pollution and is low-cost. Thus, by using the alloy as the active material in the negative electrode, the closed type Ni hydrogen storage battery having high discharging capacity and showing preferable capacity such as prolonged charging discharging cycle life, excellent rapid charging- discharging properties and low self-discharging can be obtd.
    • 9. 发明专利
    • TIP SETTING MACHINE
    • JPH02262935A
    • 1990-10-25
    • JP8438589
    • 1989-04-03
    • MITSUBISHI METAL CORP
    • SAEKI KOYO
    • B23Q3/155B23C9/00B23Q17/00
    • PURPOSE:To position a tip with high precision by detecting the shift quantity of standard shaft in the case when the standard shaft is pressed onto a throw-a way tip which is installed. CONSTITUTION:After all throw-away tips 2 are installed, a motor 24 is driven to once raise an elevation table 23, and then the table 23 is lowered, and stopped at the higher position than the above-described position. Then, the undersurface of a pressing plate 21a contacts the installed tip 2, accompanied with the lower ing of the table 23, and a standard shaft 12 is pushed up, and shifted upwardly, and the shift quantity (stroke in pushing up) of the standard shaft 2 is detected by a detector 22 and memorized, and the above-described operations are repeated. In this case, if the tip 2 is installed at the higher position than the standard position, the detection value is larger, and if installed at the lower position than the standard position, the detection value reduces, and the pertinent tip 2 and the degree of position deflection can be immediately detected, and when an allowable limit is exceeded, installation work is carried out again.
    • 10. 发明专利
    • MANUFACTURE OF HARD TUNGSTEN-BASE SINTERED ALLOY MEMBER
    • JPH02259053A
    • 1990-10-19
    • JP8103589
    • 1989-03-31
    • MITSUBISHI METAL CORP
    • MAYAMA OSAMUMIZUNO SHOICHI
    • C22F1/18B22F3/24C22C1/04C22C27/04C22F1/00
    • PURPOSE:To manufacture the W-base sintered alloy member having high hard ness and high strength by subjecting a green compact constituted of specified ratios of W, Ni and Fe to liquid phase sintering and successively executing solution treatment, swaging and aging treatment to the stock under specified conditions. CONSTITUTION:Mixed powder having blended compsn. contg., by weight, 2 to 8% Ni, 0.5 to 8% Fe and the balance substantial W is subjected to press forming under about 1 to 4 ton/cm pressure into a green compact, which is subjected to liquid phase sintering at about >=1450 deg.C for about >=30min in a hydrogen air flow of about 0 to -60 deg.C dew point. The liquid phase sintered stock is subjected to solution treatment of holding under heating at 700 to 1400 deg.C tor about 2 to 10hr in vacuum or in a nonoxidizing atmosphere and is rapidly cooled. Furthermore, the stock is subjected to swaging at 5 to 50% working ratio and is subjected to aging treatment of holding at 350 to 600 deg.C for about 1 to 3hr. In this way, fine hard precipitates are dispersedly precipitated into the matrix in abundance to obtain the W-base sintered alloy member having exceedingly improved hardness.