Enhanced wear resistance by compressive strengthening: A novel combination of laser and ion implantation technology

摘要

In general, neon implantation is not very effective in reducing wear rates. However, neon implantation into laserhyphen;melted steel turns out to reduce the wear rate substantially as a result of a conversion of residual tensile stresses into compressive ones. Nitrogen implantation, on the other hand, at a high dose of 3times;1017ions/cm2at 90thinsp;deg;C exhibits a deleterious effect on the wear performance. A brittle layer of egr;hyphen;Fe2(C,N)1minus;xnitrides is formed. At a lower dose of 1times;1017/cm2or implantation of nitrogen at 150thinsp;deg;C, the wear rate is also reduced.