| 摘要 |
<p>According to the present invention, a rear axlecase (20) is manufactured by casting the differential gear housing (21) and the axle housings (22) into an integral body from nodular graphite cast iron, ensuring good ductility therefor by reducing the hardness as a whole on one hand, and ensuring toughness to bear up the stress acting on the axles by performing hardening treatment on the root parts of the endtubes (26) of the axle housing (22).</p> |
