CHEMICAL CARRIERS AND PROCESSES FOR PRODUCING LOCALLY ALLOYED CAST ITEMS

摘要

The invention provides chemical carriers and processes to enhance cast iron items locally, by introducing such chemical carriers that enhance local properties through a local alloy where desired. The carriers can have different composition and generally comprise a carrier base structure of a suitable base composition, and the carrier can further comprise one or more external surface layers deposited on or into the original surface of the base and of a different composition than the base, to deliver desired chemicals and provide desired properties locally. By the introduction of carriers, gradient zones are obtained surrounding the carriers that show superior strength and increased strength as compared to both the bulk cast iron material and the material of the carrier base.