Machining tools and methods for manufacturing machining tools

Abstract

A machining tool having a metal bond layer that holds abrasive grains, wherein the metal bond layer contains Cu and Mg, and further contains at least one active metal element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W, and the Cu content is the highest among the elements constituting the metal bond layer.

Claims

1. It has a metal bond layer that holds abrasive grains, The metal bond layer contains 40 to 85 at% Cu, 1 to 25 at% Mg, a total of 1 to 25 at% of at least one element selected from Sn, Sb, and Bi, and a total of 0.1 to 10 at% of at least one active metal element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W. A machining tool having the highest Cu content among the elements constituting the metal bond layer.

2. The machining tool according to claim 1, wherein the abrasive grains include at least one of diamond and cBN.

3. The machining tool according to claim 1, wherein an interfacial reaction layer containing the active metal element is present between the abrasive grains and the metal bond layer.

4. The machining tool according to claim 1, wherein there are abrasive grains in which a portion is held within the metal bond layer and the other portion is exposed outside the metal bond layer.

5. The machining tool according to claim 1, wherein the metal bond layer further comprises at least one element selected from Ag, In, and Mn.

6. The machining tool according to claim 1, wherein the average particle size d of the abrasive grains is greater than the film thickness a of the metal bond layer.

7. A step of preparing a brazing material containing Cu and Mg, and further containing at least one active metal element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W, wherein the Cu content is the highest among the contained elements. A step of placing the brazing material on a metal substrate, The steps include: placing abrasive particles on the brazing material; The process involves heating and holding the metal substrate on which the brazing material and abrasive particles are arranged at a temperature above the melting point of the brazing material and below 800°C. A method for manufacturing a machining tool, comprising the step of preparing the brazing material, wherein the brazing material contains 40 to 85 at% Cu, 1 to 25 at% Mg, a total of 1 to 25 at% of at least one element selected from Sn, Sb, and Bi, and a total of 0.1 to 10 at% of the active metal element.

8. The method for manufacturing a processing tool according to claim 7, wherein the step of preparing the brazing material further includes preparing a brazing material containing a total of 35 at% or less of at least one element selected from Ag, In, and Mn.

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