SINTER SHAFT BEARING

• Main Authors: MORI TOSHIHIKO, YOSHIZUKA NORIYOSHI, SATOJI FUMINORI, SUGAI YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: BEARINGS; BLASTING; CASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; 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; PERFORMING OPERATIONS; POWDER METALLURGY; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WORKING METALLIC POWDER

To provide a sinter shaft bearing having a high hardness shaft bearing surface, capable of being manufactured at low cost, and high in dimensional accuracy.SOLUTION: There is provided a sinter shaft bearing 1 manufactured by integral molding an inner layer 2 and an outer layer 3, and having a shaft bearing surface A in an inner peripheral surface 2a of the inner layer 2, the inner layer 2 consists of a sinter metal containing Fe and high hardness elements (for example Ni, Mo), the outer layer 3 consists of a sinter metal containing Fe and no high hardness element, and concentration gradient of the high hardness elements is generated in a boundary surface between the inner layer 2 and the outer layer 3.SELECTED DRAWING: Figure 3 【課題】高硬度の軸受面を有し、低コストに製造可能で、且つ、寸法精度の高い焼結軸受を提供する。【解決手段】内側層２と外側層３とを一体成形してなり、内側層２の内周面２ａに軸受面Ａを有する焼結軸受１であって、内側層２がＦｅ及び高硬度化元素（例えばＮｉ，Ｍｏ）を含む焼結金属からなり、外側層３がＦｅを含み高硬度化元素を含まない焼結金属からなり、内側層２と外側層３との界面に高硬度化元素の濃度勾配が生じている。【選択図】図３