HITACHI METALS, LTD.
|HITACHI METALS, LTD. Patent applications|
|Patent application number||Title||Published|
|20150251124||CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD - A ceramic honeycomb structure having a large number of flow paths partitioned by porous cell walls, the cell walls having porosity of 40-60%; pores opening on the cell wall surface having an opening area ratio (total opening area of pores opening on cell wall surface per unit area) of 15% or more; the median opening diameter of the opening pores being 10 μm or more and less than 40 μm, when the opening diameter of each pore opening on the cell wall surface is expressed by an equivalent circle diameter (diameter of a circle having the same area as the opening area of each pore); the density of pores having equivalent circle diameters of 10 μm or more and less than 40 μm being 350/mm||09-10-2015|
|20150243421||ULTRAFINE-CRYSTALLINE ALLOY RIBBON, FINE-CRYSTALLINE, SOFT-MAGNETIC ALLOY RIBBON, AND MAGNETIC DEVICE COMPRISING IT - An ultrafine-crystalline alloy ribbon having a composition represented by the general formula of Fe||08-27-2015|
|20150241847||HAIRSPRING MATERIAL FOR MECHANICAL TIMEPIECE AND HAIRSPRING USING THE SAME - [Problem] To provide a hairspring material for a mechanical timepiece, a variation in Young's modulus of which can be made smaller than that of conventional ones. [Solution] The hairspring material for a mechanical timepiece of the present invention comprises an alloy which contains 37.5 to 39.5% by mass of Ni, 9.2 to 9.9% by mass of Cr, 0.35 to 0.55% by mass of Ti and 0.6 to 0.9% by mass of Be, based on the total amount of the alloy, and contains a remainder including Fe and unavoidable impurities, said alloy being an alloy containing, as the unavoidable impurities, C (carbon), Mn in an amount of more than 0% by mass but not more than 0.5% by mass and Al in an amount of more than 0% by mass but less than 0.03% by mass, the amount of said C (carbon) being limited to not more than 0.03% by mass.||08-27-2015|
Patent applications by HITACHI METALS, LTD.