| 摘要 |
The reinforcement of the crown of a piston of aluminum or aluminum alloy for an internal combustion engine comprises the preparation of a reinforcement member (10, 13) which is provided with apertures (11, 14), or reentrants. The reinforcement member is placed in a crown-forming part (18) of a piston die in a squeeze casting apparatus and the piston is squeeze cast. The molten metal penetrates the apertures, or enters the reentrants, and these are so shaped that when the molten metal has solidified, keys are formed which connect securely the reinforcement member to the aluminum or aluminum alloy. Further reinforcement members can then be readily brazed or welded to the first reinforcement member. |
