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METHOD AND SYSTEM FOR IMPROVING THE SURFACE FRACTURE TOUGHNESS OF BRITTLE MATERIALS, AND A CUTTING TOOL PRODUCED BY SUCH METHOD
METHOD AND SYSTEM FOR IMPROVING THE SURFACE FRACTURE TOUGHNESS OF BRITTLE MATERIALS, AND A CUTTING TOOL PRODUCED BY SUCH METHOD
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机译:改善脆性材料表面断裂韧性的方法和系统,以及用这种方法生产的切削工具
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摘要
This invention concerns a method of improving the wear resistance of a cemented carbide. The method includes using fracture toughness as a selection criterion and selecting a cemented carbide which has a fracture toughness between about 6 and about 15 MPa·m1/2. The method further includes applying a sacrificial coating to the cemented carbide and increasing the fracture toughness of the cemented carbide by creating a toughened surface layer using laser shock peening, thereby increasing its fracture resistance to fatigue and stress corrosion cracking. The invention also concerns a cutting tool or a cutting tool insert made from a cemented carbide and treated using the method according to the invention.
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