Diamond coated cutting tool insert and method of making same
AssigneesSandvik AB, Megadiamond, Inc.
InventorsJan Magnus Andersson, Nathan Anderson
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Abstract
A wear resistant, diamond enhanced cutting tool for excavating is disclosed. The cutting tool includes a cutting insert having a diamond coated cutting tip brazed to the cutting insert. The cutting tool is formed by brazing the insert to a tool body with a braze alloy by heating the insert and tool body to a temperature at which the braze alloy melts. The insert and tool body are then cooled to solidify the braze alloy and quenched to cause a martensitic transformation. Finally, the diamond enhanced tip is brazed to the insert while the temperature of the tool body is maintained below a temperature at which the tool body would soften. According to this method, the cutting tool is formed without creating a tempered zone of reduced hardness.
Claims6
A method of forming a cutting tool comprising:
- brazing an insert to a tool body with a braze alloy by heating the insert and tool body to a temperature at which the braze alloy melts;
- cooling the insert and tool body such that the braze alloy solidifies;
- quenching the insert and tool body such that a martensitic transformation takes place;
- tempering the insert and tool body;
- and
- brazing a diamond enhanced tip to the insert at a brazing temperature while maintaining a temperature of the tool body at a lower temperature, said lower temperature being below a temperature at which softening of the tool body would take place.
Dependencies are inferred from the claim text.