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US 12,617,034 B2Granted
Method of making a tool
AssigneeAB Sandvik Coromant
InventorsLeif Dahl, Tim Ulitzka
Life of this patent
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Abstract
A method of making a tool having a joining a maraging steel joining partner and a cemented carbide joining partner by brazing and a tool made according to the method is provided. The method includes depositing a Ni coating onto the maraging steel joining partner prior to applying the filler material having at least 70 wt % Cu. The braze joint shows excellent shear strength.
Claims8
A method of making a tool by joining a cemented carbide joining partner with a maraging steel joining partner, the method comprising the steps of:
- applying a Ni coating with a thickness of between 0.5 and 15 μm on a joining surface of the maraging steel joining partner;
- placing a filler material including at least 70 wt % Cu between the cemented carbide joining partner and the Ni coated joining surface of the maraging steel joining partner;
- subjecting the cemented carbide joining partner and the maraging joining partner with the filler material in between to a brazing process at an elevated temperature in a vacuum furnace at a temperature between 90° and 1200° C., for a time period of between 1 and 60 minutes;
- and
- subjecting the joined cemented carbide joining partner and maraging joining partner to a tempering process at a temperature of between 30° and 600° C. for between 5 minutes and 12 hours.
2 more elements
Dependencies are inferred from the claim text.