SINTERED BEARING AND MANUFACTURING METHOD THEREOF

• Main Authors: ISHIHARA CHIO, KUBO CHIE, MIYAZAKI RYOICHI, FUKAE DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 05.12.2019
• Subjects: ALLOYS; BEARINGS; BLASTING; CASTING; CHEMISTRY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FERROUS OR NON-FERROUS ALLOYS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WORKING METALLIC POWDER

To provide a sintered bearing showing an excellent life characteristic under a condition of high frequency and/or high surface pressure, and a manufacturing method thereof.SOLUTION: A sintered bearing exhibits a metal structure having a metal matrix and a hard phase 22 that is dispersed in the metal matrix and harder than the metal matrix. The difference in hardness between the metal matrix and the hard phase 22 is 290 to 650 HV. The average diameter of the hard phase is 5 to 100 μm. The metal matrix is an iron matrix 21 including a pearlite phase and a ferrite phase.SELECTED DRAWING: Figure 2 【課題】高周速及び／又は高面圧の条件下で優れた寿命特性を示す焼結軸受及びその製造方法を提供する。【解決手段】金属基地と、金属基地に分散し、かつ、金属基地より硬い硬質相２２とを有する金属組織を呈する、焼結軸受。金属基地と硬質相２２の硬さの差が、２９０〜６５０ＨＶである。硬質相の平均径が５〜１００μｍである。金属基地が、パーライト相及びフェライト相を含む鉄基地２１である。【選択図】図２