초록 ▼

A method of bonding together at least two long, metal alloy segments, of turbine components, such as turbine blade segments (18, 19, 20 and 21) by: putting a melting point depressant between the segments at bond planes (34) between contracting segments; forming a heated zone across the segments and

A method of bonding together at least two long, metal alloy segments, of turbine components, such as turbine blade segments (18, 19, 20 and 21) by: putting a melting point depressant between the segments at bond planes (34) between contracting segments; forming a heated zone across the segments and a heated front (32); where melt pools (36) form in a molten zone (38) at the heated front which front (32), pools (36) and zone (38) continuously move and pass along the bond planes (34); where crystal re-growth (35) occurs along the bonding planes to form bonds (34) between the individual segments (18, 19, 20 and 21) behind the moving molten zone (38).

대표청구항 ▼

[What is claimed is:] [11.](1) inserting a low melting bond material between long single crystal metal alloy segments;(2) spacing the segments close to each other;(3) applying heat at a first point along the length of the segments to form a first point heat zone;(4) forming, within said heat zone, a

[What is claimed is:] [11.](1) inserting a low melting bond material between long single crystal metal alloy segments;(2) spacing the segments close to each other;(3) applying heat at a first point along the length of the segments to form a first point heat zone;(4) forming, within said heat zone, a laterally constrained small, local molten pool between the closely spaced segments at said first point where heat is applied, where said heat zone contains, in coexistence: unmelted segment metal alloy that is below its melting point, melted segment metal alloy, melting segment metal alloy where the melting point of the segment metal alloy has been lowered by the bond material, melted bond material that is solid state diffusing into the unmelted segment metal alloy, and resolidifying segment metal alloy formed due to diffusion of bond material causing the melting point of the resolidifying segment metal alloy to raise; and(5) gradually moving the heat zone to additional points along the length of the metal alloy segments to form a bond between the at least two metal alloy segments along their entire length, where adjacent solid and liquid material in the moving heat zone is at the same temperature and the molten pool follows a precise constrained path between the closely spaced segments, and where the composition of the unmelted metal alloy of the segments and the melted resolidified metal alloy of the segments is essentially the same.