| 摘要 |
<p>The present invention comprises: a front subframe (12) consisting of steel and divided in the front-rear direction of the vehicle; and a rear subframe (14) consisting of light metal such as an aluminum alloy. The front subframe (12) comprises a press-formed body formed by pressing. The rear subframe (14) comprises a die-cast body formed by die-casting. The front subframe (12) and the rear subframe (14) are joined together by friction stir welding while the left and right rear side sections (36a, 36b) of the rear subframe (14) are superposed on the upper surfaces of the thin plate sections (26) of the front subframe (12).</p> |
