BONDED JOINT OF DISSIMILAR MATERIALS COMPOSED OF IRON-BASED MATERIAL AND ALUMINUM-BASED MATERIAL, AND BONDING METHOD BY WELDING

摘要

PPROBLEM TO BE SOLVED: To provide a bonded joint of dissimilar materials composed of an iron-based material and an aluminum-based material which retains high strength and is excellent in ductility, and a welding method which enables such a joint to be obtained stably. PSOLUTION: The invention relates to the bonded joint 1 of the dissimilar materials composed of the iron-based material 2 and the aluminum-based material 3. On the side of the iron-based material 2, hollows 4a are provided beforehand at regular intervals along a weld line 6. Both materials are joined by welding so that aluminum 7 is melted and poured into the hollows 4a. As shown in the drawing, (L-Al) and (L-Fe) denote the length along the weld line in the cross section of the aluminum-based welding material 3 poured into each hollow 4a, and the length along the weld line in the cross section of the iron-based material adjoining two hollows 4a filled with the aluminum-based welding material 3 respectively, per 100 mm of the length of the weld line 6 after both materials 2 and 3 are joined. The minimum value of the ratio of (L-Al) to (L-Fe), namely (L-Al)/(L-Fe) is defined within a range between more than 0.5 and less than 7. PCOPYRIGHT: (C)2006,JPO&NCIPI