Patent ID: 6913842

Claim:
A precision machine part having a longitudinal axis and a plurality of discrete conveyance passages formed therethrough and comprising a plurality of pieces bonded along faces of said pieces extending along the longitudinal axis of said precision machine part with a transient liquid phase diffusion bonding alloy provided between said pieces to bond said pieces together so as to form said conveyance passages, the precision machine part being configured to permit passage of liquid or gas through said conveyance passages from a pipe line or cylinder, wherein the bonding alloy contains 1 to 15 atomic % of B or P or a mixture of B and P and 1 to 10 atomic % V, the balance being Fe and unavoidable impurities based on the bonding alloy, and wherein the bonding alloy exhibits an amount of contraction in a bonding stress loading direction caused by plastic deformation in the bonding process of not more than 5%.