SCHMIEDESTAHL, HERSTELLUNGSVERFAHREN DAFÜR UND SCHMIEDESTÜCK

摘要

The present invention aims at providing forging steel with refined inclusions to obtain forged parts of excellent fatigue characteristics, and a useful method for manufacturing such forging steel as aforesaid. Furthermore, this invention is also to provide forged parts (in particular, a solid type crankshaft) manufactured from such forging steel as aforesaid with refined inclusions capable of exerting good fatigue characteristics. The forging steel of the present invention is characterized by its dissolved Mg concentration in the steel being 0.04-5 ppm and its dissolved Al concentration in the steel being 50-500 ppm.