鋼材接合体

Abstract

To provide a steel material bonded body having excellent bonding strength in which steel materials having different shapes are bonded to each other.SOLUTION: Adopted is a steel material bonded body 1 having a flow path structure in which a flow path upper surface C1 of a first steel material 1A forming a flow path C and a surface 1B1 of a second steel material 1B are bonded to each other. A carbon concentration of a bonding interface I of the bonding has a maximum peak value at the bonding interface I and decreases as going away from the bonding interface I.SELECTED DRAWING: Figure 1

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