| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of heat deformation in welding, which is caused by very high temperature at a weld and its peripheral part as metal is melted in the welding, though a technique to attach a reinforcing piece to a cylinder block by welding is conventionally known as a reinforcing method for an open- deck type cylinder block. SOLUTION: After bond 30, 30 are applied to the both sides of aluminum alloy pieces 20, the aluminum alloy pieces 20 are inserted in water-cooled jackets 12 as shown by arrows, heated and fixed. The reinforcing aluminum alloy pieces are bonded and fixed to the cylinder block by the bond composed by kneading powder of Mg into powder AlN, adding hydroxy solvent to it, and mixing it. This bond enable joint at remarkably lower temperature compared to the welding. Therefore, there is no possibility to cause temperature deformation at the cylinder block and the aluminum alloy pieces, and dimensional accuracy can be well maintained.
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