DRIVEN-SIDE ROTATING BODY, CLUTCH DEVICE WITH THE DRIVEN-SIDE ROTATING BODY, METHOD FOR MANUFACTURING THE DRIVEN-SIDE ROTATING DEVICE, AND METHOD FOR MANUFACTURING THE CLUTCH DEVICE WITH THE DRIVEN-SIDE ROTATING BODY

摘要

PROBLEM TO BE SOLVED: To provide a driven-side rotating body for a clutch device capable of maintaining power transmission characteristics in the clutch device for a long time and capable of being effectively manufactured, the clutch device with the driven-side rotating body, a method for manufacturing the driven-side rotating device, and a method for manufacturing the clutch device with the driven-side rotating body.;SOLUTION: A clutch plate 17 as the driven side rotating body in the clutch device 10 is arranged in a heat treatment furnace, and inert gas is introduced into the heat treatment furnace, and is heated at about 740°C. Next, ammonia gas is introduced into the heat treatment furnace in a flow rate required to make nitrogen enter into solid solution on a surface of the clutch plate 17 at the concentration of about 0.1-1.0%. The temperature and the nitrogen concentration in the heat treatment furnace are maintained to be constant, and thereby, the nitrogen is infiltrated through a surface layer of the clutch plate 17, and a nitrogen containing layer is formed. Next, the clutch plate 17 on which nitrogen containing layer is formed is released into cooling oil, the nitrogen containing layer is quenched, and is transformed into the martensitic structure.;COPYRIGHT: (C)2010,JPO&INPIT