Abstract
Nitriding and carburizing by laser irradiation in combination with a process gas is a common method to enhance the surface properties of various materials. This chapter discusses the different aspects of the process starting from fundamental mechanism up to engineering applicability. It will introduce and classify the method followed by a brief but detailed summary on the basic physical and chemical mechanisms involved. Further, the most common materials, their suitability and upcoming opportunities will be discussed. A major goal is to offer an insight into the issues at the model system titanium (Ti-alloys) comprising laser radiation and time aspects. Carburizing will be the central focus in another section. Surface treatments of steel and nonferrous materials will be explained and examined from different sides. As well, nitrocarburizing as a kind of hybrid process will be introduced. The chapter closes with referring to future developments and trends.
