Date: 2013-08-22

NTN has developed a high corrosion resistance of aluminum bronze material sintered bearing

NTN (NTN) has developed a sintered bearings can be used in gasoline and other corrosion-prone environment, and has begun to provide programs to the automotive manufacturers. Automobile and motorcycle use motor-fuel pumps and EGR (exhaust gas recirculation) devices are generally equipped with a sintered bearing bronze-based sintered bearings or copper-nickel alloy class. The fuel pump bearings is a vendor monopoly and higher prices. Bronze class bearings easy corrosion of the organic acids contained in the gasoline, cupronickel class bearings must be in a material add expensive nickel (Ni). This time, NTN aluminum bronze as sintering bearing materials. Aluminum bronze is an excellent corrosion resistance of the material, but in a high temperature environment, its surface will form an oxide, and therefore not suitable for powder metallurgy sintering step. NTN adjusting material composed of the same time, to improve the manufacturing method to improve the sinterability of aluminum bronze material, thereby realizing a Cupronickel category bearings equal or superior corrosion resistance. New products has not occurred in the salt spray test of JIS (Japanese Industrial Standard) Pseudomonas (rust). Another, NTN is still material adding an appropriate amount of graphite, so that the coefficient of friction of the bearing down with the cupronickel class bearing the same 0.1 or less, and the wear resistance of a the cupronickel class bearing nine times more.

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