Influence and Analysis of Concentrate Degree of Plasma Arc for Heat Process of Hardening Treatment

THE metal material can obtain better use performancesuch as rigidity and anti-fatigue by surface hardentreatment using high energy density plasma beam.Thesurface harden treatment by plasma arc is correlated tothe heat cycle for the treatment course of the hardenzone.In order to enhance the surface quality of theprocessed workpiece,assure the stability of the processcourse and control effectively process technologycourse,the study of the heat process for plasma arctreatment is very important in…

Influence and Analysis of Concentrate Degree of Plasma Arc for Heat Process of Hardening Treatment

According to the practicable model of the plasma arc surface quench, the influence law of the heat process, cooling course, temperature field about surface quench treatment by plasma arc due to the concentrate degree of plasma arc heat source are discussed in this paper. It shows that the concentrate degree of plasma arc heat source can change the width of the hardening zone and can not change the maximum harden depth. With the increase of the concentrate degree, the area of the heat influence zone is decreased and its shape is narrowed after the heat source. Relative to cooling rate, the influence of the heat source concentrate degree for heat absorption is bigger. The correctness of the practical model are proved with experimental results for quench hardening of steel by plasma arc.