In ion-nitriding process, surface hardness and case depth of workpiece are greatly influenced by the treating temperature.
The objective of this study is to find out the temperature distribution in workpiece at two cases of infinite cylinder and U-type notched infinite cylinder.
Transient and steady state temperature characteristics of ion-nitrided workpieces of various notch geometries are studied numerically by using Finite Difference Method and the results are checked experimentally. Assuming uniform distribution of surface heat source, the analysis of lumped heat capacity method for transient temperature rise in the workpiece is also presented. Boundary conditions of combined radiation and conduction problem are discussed in view of computer programming and order of accuracy.
Temperature of workpiece is measured by using radiation pyrometer. Experimental data show satisfactory agreement with numerical results.
