초록 ▼

A multilayer engine bearing (10) includes a steel backing (12) having a liner (18) of bearing metal of either copper-lead or aluminum alloys formed on the backing (12) to define a base lining member (20) of the bearing (10). A multilayer overplate (22, 122) is formed on the base lining member (20,12

A multilayer engine bearing (10) includes a steel backing (12) having a liner (18) of bearing metal of either copper-lead or aluminum alloys formed on the backing (12) to define a base lining member (20) of the bearing (10). A multilayer overplate (22, 122) is formed on the base lining member (20,120) and includes multiple lead-free soft layers (24,124) separated by lead-free hard layers (26,126). The relative thicknesses of the overplate layers may be controlled to provide a macro hardness gradient across the thickness of the overplate (122) such that, for example, the overplate (122) may be softer near its top region (130) as compared to its bottom region (132).

대표청구항 ▼

[ What is claimed is:] [1.]1. A multilayer sliding bearing comprising:a base lining member including a rigid metal backing and a lining of bearing metal provided on said backing layer; anda lead-free multilayer overplate comprising a plurality of alternating soft and hard micro-thin overplate layers

[ What is claimed is:] [1.]1. A multilayer sliding bearing comprising:a base lining member including a rigid metal backing and a lining of bearing metal provided on said backing layer; anda lead-free multilayer overplate comprising a plurality of alternating soft and hard micro-thin overplate layers of lead-free metal materials electroplated onto said base lining member each having a thickness of about half or less of said overall thickness of said overplate.