Abstract
The object of this study is to improve precision and heavy grinding operations of 0.008-0.97%C steels by introducing hydrogen treatment (cathodic charging in 5 vol. % sulphic acid Aq.). And, the present paper deals with the effect of the hydrogen embrittlement in steels on grindability factors; that is normal and tangential grinding force Fn Ft, surface roughness, side flow of ground surface, damaged structure and residual stress in grinding layer.
The main results obtained by experiments are as follows :
1) The reduction of grinding force due to hydrogen embrittlement gives about Fn=30-45%, Ft= 25-35% in the range of 0.008-0.97%C.
2) The reduction of surface roughness Hmax due to hydrogen embrittlement gives about 20-50% in the range of 0.008-0.97%C.
3) The reduction of side flow of ground surface due to hydrogen embrittlement increases gradually as carbon content in steels decreases.
4) The reduction of plastic flow in ground surface layer due to hydrogen embrittlement increases gradually as carbon content in steels decreases.
5) The dimensions of residual stress distribution in ground surface layer due to hydrogen embrittlement is not very much changed.
