Joining method
First Claim
1. A joining method for producing a component from two or more constructional elements made of a metallic material, in particular of an oxide dispersion-hardened alloy based on nickel or iron, which comprises;
- heat-treating the constructional elements before being joined to produce a coarse-grained oriented structure, inserting a metallic interlayer between the constructional elements which were heat-treated to produce a coarse-grained oriented structure to form a joining zone of interlayer with surfaces of the two constructional elements, said metallic interlayer manufactured from the same oxide disperison-hardened alloy as the constructional elements and having during joining the same extrusion direction as the constructional elements, and further having a plastic fine-grained recrystallizable structure, joining the assembly of heat-treated constructional elements having a coarse-grained, oriented structure with the inserted interlayer having a plastic fine-grained recrystallizable structure by heating at a temperature between 800°
-1100°
C. and a pressure of 1 through 200 Pa to effect deformation with a fine-grained growth of the interlayer below 1 μ
m, and subjecting the resultant component formed from the constructional elements to a heat treatment to effect oriented recrystallization over the joining zone.
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Accused Products
Abstract
The invention relates to a joining method for the production of a component from two or more constructional elements which are manufactured from a highly distortion-resistant metallic material, in particular a material based on nickel or iron. The constructional elements and the interlayer are manufactured from an oxide dispersion-hardened material, and are joined together with insertion of the interlayer to give the component. The interlayer is in an unrecrystallized fine-grained plastic state before the joining process, and undergoes recrystallization, as a result of heat treatment, only after the joining process, which is carried out at a temperature of 800 to 1,100 degrees centigrade and under a pressure of 1 to 200 Mpa.
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Citations
15 Claims
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1. A joining method for producing a component from two or more constructional elements made of a metallic material, in particular of an oxide dispersion-hardened alloy based on nickel or iron, which comprises;
- heat-treating the constructional elements before being joined to produce a coarse-grained oriented structure, inserting a metallic interlayer between the constructional elements which were heat-treated to produce a coarse-grained oriented structure to form a joining zone of interlayer with surfaces of the two constructional elements, said metallic interlayer manufactured from the same oxide disperison-hardened alloy as the constructional elements and having during joining the same extrusion direction as the constructional elements, and further having a plastic fine-grained recrystallizable structure, joining the assembly of heat-treated constructional elements having a coarse-grained, oriented structure with the inserted interlayer having a plastic fine-grained recrystallizable structure by heating at a temperature between 800°
-1100°
C. and a pressure of 1 through 200 Pa to effect deformation with a fine-grained growth of the interlayer below 1 μ
m, and subjecting the resultant component formed from the constructional elements to a heat treatment to effect oriented recrystallization over the joining zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- heat-treating the constructional elements before being joined to produce a coarse-grained oriented structure, inserting a metallic interlayer between the constructional elements which were heat-treated to produce a coarse-grained oriented structure to form a joining zone of interlayer with surfaces of the two constructional elements, said metallic interlayer manufactured from the same oxide disperison-hardened alloy as the constructional elements and having during joining the same extrusion direction as the constructional elements, and further having a plastic fine-grained recrystallizable structure, joining the assembly of heat-treated constructional elements having a coarse-grained, oriented structure with the inserted interlayer having a plastic fine-grained recrystallizable structure by heating at a temperature between 800°
Specification