| abstract |
The present invention provides a kind of high-frequency quenching component semi-finished product, wherein, the chemical composition of the steel of mother metal contains C in terms of quality %：0.35~0.6%, Si：0.02~2.0%, Mn：0.35~1.5%, Al：0.001~0.5%, Cr：0.05~2.0%, S：0.0001~0.05%, N：0.003~0.0120%, P：Less than 0.03%, O：Less than 0.0050%, skin section has thickness as 0.1~50 μm of iron-nitrogen compound layer using the thickness gauge of depth direction, and the Fe nitride in the iron-nitrogen compound layer is that the volume fraction of γ ' phases is more than 80%. |