US9938635B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9938635-B2 |
| Application number | US-201514710374-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 12, 2015 |
| Priority date | May 22, 2014 |
| Publication date | Apr 10, 2018 |
| Grant date | Apr 10, 2018 |
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Official abstract text for this publication.
A method for producing a component includes joining individual wall parts, especially for producing a melting crucible for use at a high operating temperature in a crucible-pulling method for quartz glass, wherein at least two wall parts of a refractory metal or of a base alloy of a refractory metal are provided, butt-joined to form a joint and joined together by sintering at a temperature above 1500° C. to form the component. A sealant is inserted into the joint to provide a component of improved tightness and to ensure improved sintering of the individual parts of the component. A component produced according to the method, particularly a melting crucible, particularly in a crucible pulling method for quartz glass, has the joint between the butt-joined walls closed in a gas-tight manner by a sealant.
Opening claim text (preview).
The invention claimed is: 1. A method for producing a component, said method comprising: providing at least two wall parts of a refractory metal or of a base alloy of a refractory metal, aligning and abutting the wall parts so as to form a joint; and joining the wall parts together by sintering at a temperature above 1500° C. so as to form the component, wherein the method further comprises inserting a sealant consisting essentially of hafnium, niobium, zirconium or platinum, or of an alloy with hafnium, niobium, zirconium or platinum as a base element, supported in the joint. 2. The method according to claim 1 , wherein the sealant is a tungsten-hafnium alloy with a hafnium amount of 78% by wt. 3. The method according to claim 1 , wherein the joint between the butt-joined wall parts comprises a groove into which the sealant is inserted. 4. The method according to claim 1 , wherein the sealant is inserted in the form of a structural component. 5. The method according to claim 1 , wherein the sealant is inserted in the form of a wire. 6. The method according to claim 5 , wherein the sealant has a round profile and a wire diameter in the range of 0.1 mm to 1.0 mm. 7. The method according to claim 5 , wherein the sealant has a polygonal profile. 8. The method according to claim 1 , wherein the sealant is inserted in the form of a film with a film thickness in the range of 0.05 mm to 0.5 mm. 9. The method according to claim 1 , wherein tungsten or molybdenum or a tungsten or molybdenum base alloy is used as the refractory metal for the wall parts. 10. The method according to claim 5 , wherein the sealant has a triangular profile. 11. The method according to claim 1 , wherein the component is a melting crucible configured for use at a high operating temperature in a crucible pulling method for quartz glass.
Drawing tubes, cylinders, or rods from the melt · CPC title
specially adapted for particular articles or work (B23K20/129 takes precedence) · CPC title
Glass-melting pots · CPC title
Crucibles or containers for supporting the melt · CPC title
Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles · CPC title
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