Patent number: 10273838
Abstract: Provided is a valve seat insert made of an iron-base sintered alloy, in which a base matrix part that includes a base matrix phase and hard particles, has a base matrix part composition containing, in % by mass, 0.5%-2.0% of carbon and 10%-70% in total of one kind or two or more kinds selected from nickel, cobalt, chromium, molybdenum, vanadium, tungsten, manganese, silicon and sulfur, with the balance being iron and unavoidable impurities, and Co-base hard particles having a composition containing, 1.0% or less of C, 25%-50% of Mo, 5%-15% of Cr, Si as an impurity in a content adjusted to be 0.3% or less, with the balance being Co, and having a Vickers hardness of 500 to 1,500 HV, are dispersed as hard particles in the base matrix phase in an amount of 10%-60% by mass with respect to the total amount of the valve seat insert.
Type:
Grant
Filed:
December 21, 2016
Date of Patent:
April 30, 2019
Assignees:
NIPPON PISTON RING CO., LTD., HONDA MOTOR CO., LTD., SANYO SPECIAL STEEL CO., LTD.
Inventors:
Satoshi Ikemi, Hiroshi Oshige, Seisuke Takaki, Tomoki Okita, Keisuke Ishii, Toshiyuki Sawada, Hiroyuki Hasegawa
Publication number: 20180187291
Abstract: An object of the present invention is to provide a sintered alloy having high mechanical strength (specifically, high toughness suitable for a sputtering target material) and a sputtering target material including the sintered alloy, and the present invention provides a sintered alloy that includes: Mn; an A-group element consisting of one or more of Ga, Zn, Sn, Ge, Al, and Co; and optionally a B-group element consisting of one or more of Fe, Ni, Cu, Ti, V, Cr, Si, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Ta, W, Re, Ir, Pt, Au, Bi, La, Ce, Nd, Sm, Gd, Tb, Dy, and Ho, wherein the balance is an inevitable impurity, wherein the sintered alloy includes one or more of a 1st to a 6th Mn phases that satisfy predetermined conditions.
Type:
Application
Filed:
June 29, 2016
Publication date:
July 5, 2018
Inventors:
Hiroyuki Hasegawa, Noriaki Matsubara