Modification of high-chromium cast iron alloy by N and Ti ion implantation

The effects of single- and dual-element (N and Ti) ion implantation on the properties of high-chromium cast iron alloys are investigated. Crystal defects, secondary hardening phase of CrN, and various crystal and amorphous forms are produced by ion implantation, and as a result, the microhardness, wear fatigue resistance, wear abrasion resistance, erosion resistance, and friction coefficient are improved. The developed technology has been successfully applied by the oil industry to prolong the lifetime of cylinder liners by three to four times and that of the rubber pistons in mud pumps by a factor of 2.