Bonded article and method for manufacturing bonded article

A method for manufacturing a bonded article, comprising the steps of:

• providing a first bonding target member;
• providing a second bonding target member to be bonded to the first bonding target member, the second bonding target member having a hole portion that can receive a part of the first bonding target member;
• applying a pressing force between the first and second bonding target member with the part of the first bonding target member received in the hole portion;
• and
• applying a bonding electric current to a bonding target portion between the first and second bonding target members with the pressing force being applied thereto;
• wherein the first and second bonding target members are made of metal materials with different melting points;
• one of the first and second bonding target members, whichever has a lower melting point, has a heat capacity increasing portion for increasing the heat capacity thereof in the vicinity of the bonding target portion;
• the one of the bonding target members has a taper face at the bonding target portion, and the heat capacity increasing portion has a face extending from the taper face;
• and
• the step of applying a pressing force is carried out with the other of the first and second bonding target members positioned not to contact the heat capacity increasing portion,
• wherein the heat capacity increasing portion is formed of a metal material with a good heat conductivity that is separate from the one of the bonding target members.

A bonded article, comprising:

• a second bonding target member having a hole portion that can receive a part of a first bonding target member;
• and
• a first bonding target member bonded to the second bonding target member at a bonding target portion, with the part of the first bonding target member received in the hole portion of the second bonding target member,
• wherein the first and second bonding target members are made of metal materials with different melting points;
• one of the first and second bonding target members, whichever has a lower melting point, has a heat capacity increasing portion that increases the heat capacity thereof in the vicinity of the bonding target portion;
• the one of the bonding target members has a taper face at the bonding target portion, and the heat capacity increasing portion has an inclined a face extending continuously from the taper face, and a length of the inclined face is 1.5 to 5 times a length of the taper face;
• and
• the first and second bonding target members are positioned such that the other of the first and second bonding target members does not contact the heat capacity increasing portion.

A bonded article, comprising:

• a second bonding target member having a hole portion that can receive a part of a first bonding target member;
• and
• a first bonding target member bonded to the second bonding target member at a bonding target portion, with the part of the first bonding target member received in the hole portion of the second bonding target member,
• wherein a melting point of the second bonding target member is lower than a melting point of the first bonding target member;
• the second bonding target member has an annular heat capacity increasing portion disposed outside the hole portion and in the vicinity of the bonding target portion to increase a heat capacity of the second bonding target member;
• the second bonding target member has a taper face at the bonding target portion, and the heat capacity increasing portion has an inclined face extending continuously from the taper face, and a length of the inclined face is 1.5 to 5 times a length of the taper face;
• and
• the first and second bonding target members are positioned such that the first bonding target member does not contact the heat capacity increasing portion.