| 摘要 |
<p>1,137,617. Surface hardening drive shafts. AEG-ELOTHERM G.m.b.H. Oct. 20, 1967 [Oct. 28, 1966], No. 47931/67. Heading C7N, A vehicle steel drive shaft is hardened by inductively surface heating the shaft 1 along its entire length whilst rotating about its axis, e.g. held between centres 4 under a linear inductor 2, whereby the whole surface becomes uniformly heated at the same time, and then overall quenching the heated shaft, e.g. by dropping it into a quenching bath to form martensite. The terminals 3 of the inductor are joined to a source of A.C. e.g. of frequency 10, 000 c/s.</p> |
