Restoration of shaft sliding supports of ship diesel engines by means of powder welding

Criteria for choosing a way of supports restoration were: ecological compatibility, sufficient hardness, adhesive strength and cohesive resistance, operational properties, an opportunity to process a layer by cutting, and the minimal failure of supports coaxiality during welding. Restoration of root supports in blocks of cylinders has been realized by means of electrocontact welding with a sintered powder tape in the form of two semi-rings. The selected structures of a sintered powder tape after welding formed a rather technological layer satisfying to operational properties: adhesive strength and cohesive resistance > 10 kg/mm2, hardness НV 200…230. The accelerated tests of restored diesel engines have shown that the operational resistance was increased in 2.1…2.5 times, in comparison with factory blocks. The developed environmentally appropriate technology may be successfully used to restore external and internal surfaces of other hull details.