| 摘要 |
1,262,918. Crank-shafts. AEG ELOTHERM G.m.b.H. 26 Sept., 1969 [9 Oct., 1968], No. 47570/69. Heading F2U. A case hardened steel component (e.g. a crank-shaft) having a lubrication duct 2 extending obliquely from the surface, has in the acute angle at 4<SP>11</SP> between the duct and the surface a connecting radial hole 7 or a connecting slit 5 of which the edge 6 is rounded. The hole 7 or slit 5 are stated to reduce cracking due to embrittlement in the region 4<SP>11</SP>. |
