| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high-strength intermediate shaft for CVJ (constant velocity universal joints) in which a characteristic of >2,000 MPa level static torsional strength can be exhibited while effectively utilizing an induction hardening technology. <P>SOLUTION: The high-strength intermediate shaft for constant velocity universal joint is composed of steel in which chemical components, particularly C, Mn, Ni, Mo, B, etc., are specified. When a radius in the minimum diameter portion of the shaft and the depth of a quench-hardened layer resultant from induction hardening are represented by (r) and (t), respectively, the ratio of (t/r) is made to≥0.7. Further, the grain size number of the quench-hardened layer is≥9 and static torsional strength is≥2,000 MPa. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
