摘要:
A contact pressure-resistant member including a rolling contact portion having a carbon concentration ranging from 0.8 to 1.2%. The contact pressure-resistant member is made of a steel material containing 0.15 to 0.40% by mass of C, 0.50 to 1.50% by mass of Si, 0.20 to 1.50% by mass of Mn, 0.50 to 1.50% by mass of Cr, and 0.05 to 0.50% by mass of Mo, 0.010% by mass or less of P, at least one element selected from the group consisting of 0.50 to 3.50% by mass of Ni, 0.03 to 0.20% by mass of Ti, 0.03 to 0.15% by mass of Nb and 0.01 to 0.10% by mass of Al, and the balance of Fe and inevitable impurities.
摘要:
A rolling bearing (1) used in a system including an automotive power train and a peripheral auxiliary equipment of the power train, and in a compressor. The rolling bearing comprises a first race (1a) and a second race (1b). A rolling element (1d) is rotatably disposed between the first and second races. A film whose main component is a metal selected from the group consisting of nickel and copper has a thickness ranging from 0.1 to 15µm. The film is formed on a surface of at least one of the first race, the second race and the rolling element.
摘要:
A bearing pressure-resistant member, including a matrix and a carbide dispersed in the matrix, the carbide having an average particle size of not more than 0.3 µm. A C content in an outer surface of the bearing pressure-resistant member is in a range of 0.6 to 1.5 mass percent. A process for making the bearing pressure-resistant member including subjecting a workpiece containing C to either of gas carburizing and gas carbonitriding to enhance the C content in the outer surface of the workpiece to 0.6 to 1.5 mass percent, holding the workpiece at a first temperature (tl) not more than an Ac 1 transformation point under reduced pressure, heating the workpiece to a second temperature (t2) not less than the Ac 1 transformation point under reduced pressure, followed by holding the workpiece at the second temperature (t2), and subjecting the workpiece to quenching.
摘要:
A high strength gear (10) is provided which comprises a base metal (12) of an iron-based alloy, the base metal being carburized or carbonitrided and having a tooth surface (16), and a coating (14) formed on the tooth surface (16) and containing Fe nitride and/or Fe carbonitride. A method of forming a high strength gear (10) is also provided.
摘要:
A rolling bearing (1) used in a system including an automotive power train and a peripheral auxiliary equipment of the power train, and in a compressor. The rolling bearing comprises a first race (1a) and a second race (1b). A rolling element (1d) is rotatably disposed between the first and second races. A film whose main component is a metal selected from the group consisting of nickel and copper has a thickness ranging from 0.1 to 15µm. The film is formed on a surface of at least one of the first race, the second race and the rolling element.
摘要:
A bearing pressure-resistant member, including a matrix and a carbide dispersed in the matrix, the carbide having an average particle size of not more than 0.3 µm. A C content in an outer surface of the bearing pressure-resistant member is in a range of 0.6 to 1.5 mass percent. A process for making the bearing pressure-resistant member including subjecting a workpiece containing C to either of gas carburizing and gas carbonitriding to enhance the C content in the outer surface of the workpiece to 0.6 to 1.5 mass percent, holding the workpiece at a first temperature (tl) not more than an Ac 1 transformation point under reduced pressure, heating the workpiece to a second temperature (t2) not less than the Ac 1 transformation point under reduced pressure, followed by holding the workpiece at the second temperature (t2), and subjecting the workpiece to quenching.
摘要:
A high strength gear (10) is provided which comprises a base metal (12) of an iron-based alloy, the base metal being carburized or carbonitrided and having a tooth surface (16), and a coating (14) formed on the tooth surface (16) and containing Fe nitride and/or Fe carbonitride. A method of forming a high strength gear (10) is also provided.
摘要:
A rolling element for a continuously variable transmission, including a plurality of rolling members (3, 11, 15) having rolling contact portions (3a, 11a, 7b; 6a, 7a, 8) coming into rolling contact with each other via lubricating oil. At least one of the rolling contact portions includes an outer surface layer having a surface microhardness of not less than Hv 750, a surface residual compressive stress of not less than 1000 MPa and a residual austenite content of not more than 10% by volume.