Low-temperature matrix impregnation material of rock cutting tool and preparation method thereof

Abstract

The invention discloses a low-temperature matrix impregnation material of a rock cutting tool and a preparation method thereof. The matrix impregnation material is composed of the following componentsincluding, by mass, 65%-97% of copper alloy, 0.9%-2.8% of Sn powder and 0.3%-1% of Ga. The Sn and Ga elements in the matrix impregnation material provided by the invention have the three main effectsthat firstly, the sintering temperature of the rock cutting tool is lowered, diamond is better protected, and sharp declining of the comprehensive performance of the diamond is slowed down; secondly,a multi-element alloy formed by adding the two metal elements in a matrix enables the holding capacity for the diamond to be enhanced; and thirdly, the bending strength, the hardness and abrasion resistance of the matrix material are further improved.

Description

technical field

[0001] The invention relates to a method for preparing a matrix in the fields of geological drilling, oil and gas drilling and stone processing, in particular to a low-temperature matrix impregnating material for rock cutting tools and a preparation method thereof. Background technique

[0002] Rock cutting tools consist of a mixture of diamond and matrix material. Diamond is mainly used for grinding rocks, and the particle size, concentration and grade of diamonds are closely related to rock crushing ability. The thermal stability of diamond is poor. The color of diamond will gradually turn black above 600°C in pure oxygen. When it reaches 720°C, it can burn in pure oxygen. In the presence of a small amount of oxygen or inert gas, the temperature of diamond graphitization is at Around 970°C, it will reduce the service efficiency and life of rock cutting tools.

[0003] The matrix material is the carrier of diamond. The sintering temperature of the rock cut...

Examples

Embodiment 1

[0029] The mass percentages of the impregnated metal components are: copper alloy 95%, tin Sn powder (300 mesh) 1.8%, gallium Ga0.6, wherein the copper alloy contains the following components in mass percentages: nickel Ni16%, manganese Mn25%, zinc Zn10%, silicon Si0.2, and copper Cu as the balance; brazing flux accounts for 5% of the total mass of impregnated metal, and is put into the crucible in the order of copper alloy, tin Sn powder, and gallium Ga, and brazing flux is added to the upper layer. Put it into a heating furnace and heat it up to 980°C. After keeping it warm at this temperature for 18 minutes, pour the metal mixed melt into distilled water, cool it sharply for 1 second, solidify and form discontinuous particles; pour the mixed metal melt into the pre-prepared After cooling in the mold, the carcass impregnating material of predetermined shape can be obtained.

Embodiment 2

[0031] The mass percentages of the impregnated metal components are: copper alloy 97%, tin Sn powder (300 mesh) 2.8% and gallium Ga1%, wherein the copper alloy contains the following components in mass percentage: nickel Ni16%, manganese Mn25%, zinc Zn10 %, silicon Si0.2 and the balance is copper Cu; the brazing flux accounts for 3% of the total mass of the impregnated metal, and is put into the crucible in the order of copper alloy, tin Sn powder, and gallium Ga, and the brazing flux is added to the upper layer, and put into Heat up to 1000°C in a heating furnace, keep warm at this temperature for 10 minutes, pour the metal mixed melt into distilled water, cool rapidly for 1 second, solidify and form discontinuous particles; pour the metal mixed melt into the pre-prepared mold Internal cooling can obtain the carcass impregnating material of predetermined shape.

technical field

[0001] The invention relates to a method for preparing a matrix in the fields of geological drilling, oil and gas drilling and stone processing, in particular to a low-temperature matrix impregnating material for rock cutting tools and a preparation method thereof. Background technique

[0002] Rock cutting tools consist of a mixture of diamond and matrix material. Diamond is mainly used for grinding rocks, and the particle size, concentration and grade of diamonds are closely related to rock crushing ability. The thermal stability of diamond is poor. The color of diamond will gradually turn black above 600°C in pure oxygen. When it reaches 720°C, it can burn in pure oxygen. In the presence of a small amount of oxygen or inert gas, the temperature of diamond graphitization is at Around 970°C, it will reduce the service efficiency and life of rock cutting tools.

[0003] The matrix material is the carrier of diamond. The sintering temperature of the rock cut...

Examples

Embodiment 1

[0029] The mass percentages of the impregnated metal components are: copper alloy 95%, tin Sn powder (300 mesh) 1.8%, gallium Ga0.6, wherein the copper alloy contains the following components in mass percentages: nickel Ni16%, manganese Mn25%, zinc Zn10%, silicon Si0.2, and copper Cu as the balance; brazing flux accounts for 5% of the total mass of impregnated metal, and is put into the crucible in the order of copper alloy, tin Sn powder, and gallium Ga, and brazing flux is added to the upper layer. Put it into a heating furnace and heat it up to 980°C. After keeping it warm at this temperature for 18 minutes, pour the metal mixed melt into distilled water, cool it sharply for 1 second, solidify and form discontinuous particles; pour the mixed metal melt into the pre-prepared After cooling in the mold, the carcass impregnating material of predetermined shape can be obtained.

Embodiment 2

[0031] The mass percentages of the impregnated metal components are: copper alloy 97%, tin Sn powder (300 mesh) 2.8% and gallium Ga1%, wherein the copper alloy contains the following components in mass percentage: nickel Ni16%, manganese Mn25%, zinc Zn10 %, silicon Si0.2 and the balance is copper Cu; the brazing flux accounts for 3% of the total mass of the impregnated metal, and is put into the crucible in the order of copper alloy, tin Sn powder, and gallium Ga, and the brazing flux is added to the upper layer, and put into Heat up to 1000°C in a heating furnace, keep warm at this temperature for 10 minutes, pour the metal mixed melt into distilled water, cool rapidly for 1 second, solidify and form discontinuous particles; pour the metal mixed melt into the pre-prepared mold Internal cooling can obtain the carcass impregnating material of predetermined shape.

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