Abstract: A manufacturing method for wear resistant sintered member is provided. The method includes: compacting a raw powder containing a matrix forming powder and a hard phase forming powder into a green compact, the matrix forming powder containing 90 mass % or more of a powder having the maximum particle diameter of 46 ?m, and the hard phase forming powder being 40 to 70 mass % with respect to the raw powder; and sintering the green compact.

Abstract: A manufacturing method for wear resistant sintered member is provided. The method includes: compacting a raw powder containing a matrix forming powder and a hard phase forming powder into a green compact, the matrix forming powder containing 90 mass % or more of a powder having the maximum particle diameter of 46 ?m, and the hard phase forming powder being 40 to 70 mass % with respect to the raw powder; and sintering the green compact.

Abstract: Disclosed is a sintered valve guide guide formed of a sintered alloy consisting essentially of 3.5 to 5% copper, 0.3 to 0.6% tin, 0.04 to 0.15% phosphorus, 1.5 to 2.5% carbon and the balance iron, by mass, and as occasion needs, further containing 0.46 to 1.41% metal oxide, and MnS and/or magnesium silicate. The metallographic structure has: a matrix containing a pearlite phase, a Fe—P—C compound phase and a Cu—Sn alloy phase; pores; and a graphite of 1.2 to 1.7% by mass of the sintered alloy. In the cross section, the ratio of the pearlite phase to the matrix is 90 area % or more, the ratio of the Fe—P—C compound phase is 0.1 to 3 area % of the cross section, the ratio of the Cu—Sn alloy phase to the cross section is 1 to 3% by area, and the ratio of a portion of the Fe—P—C compound phase having a thickness of 15 microns or more is 10 area % or less of the whole Fe—P—C compound phase.

Abstract: A valve seat is provided in which wear resistance can be ensured by optimizing the matrix structure without dispersing of expensive hard particles, and therefore the machinability can be improved and the holding down of cost can be achieved. The valve seat exhibits a metallographic structure consisting of only bainite single phase or only a mixed phase of bainite and martensite, has an area ratio of bainite and martensite in cross section of 100:0 to 50:50, and has a matrix hardness of 250 to 850 Hv.

Abstract: To provide an information processing apparatus for efficiently managing documents and various procedures relating to a patent application. Information relating to a patent application is accumulated in a database for each case, and managed for due date. When an inventor has to study a case, a request to study the case is issued to the inventor through a network, and the state of the study by the inventor is checked through the network. Furthermore, a case is transferred to request a third party to study the case, and the transfer of document data overseas is managed according to laws and regulations.

Abstract: A valve seat is provided in which wear resistance can be ensured by optimizing the matrix structure without dispersing of expensive hard particles, and therefore the machinability can be improved and the holding down of cost can be achieved. The valve seat exhibits a metallographic structure consisting of only bainite single phase or only a mixed phase of bainite and martensite, has an area ratio of bainite and martensite in cross section of 100:0 to 50:50, and has a matrix hardness of 250 to 850 Hv.

Abstract: A sintered alloy having superb wear resistance comprising: composite phases dispersed in a matrix of the sintered alloy; the composite phase consisting of; a particle group in which Cr carbide particles and Cr sulfide particles exist in a mixed condition; and a ferrite phase or a mixture phase of ferrite and austenite surrounding the particle group as a core.