Novel metallic bond as well as preparation method and application thereof

Abstract

The invention provides a novel metallic bond as well as a preparation method and application thereof. The metallic bond is prepared from the following raw materials in percentage by mass: 45-90% of Cu, 5-50% of Sn and 1-30% of ZrH2 powder, the sum of the mass fractions of the components is 100%. The metal bonding agent can be used for preparing a superhard grinding tool and has excellent mechanical property and sharpness and good shape retention and heat dissipation performance.

Description

Technical Field

[0001] The invention relates to the technical field of superhard materials, in particular to a novel metal binder and a preparation method and application thereof. Background Art

[0002] Metal bond abrasives such as grinding wheels can withstand greater grinding pressure and are highly durable. They are widely used in the processing of stone, ceramics, optical glass, semiconductor devices, and cemented carbide. During the use of abrasives, the normal wear of abrasive grains goes through a cycle of abrasive surface wear-abrasive grains forming a platform-abrasive surface brittle cracks-abrasive micro-edges appear-abrasive grains forming a new platform, until the abrasive falls off from the matrix, exposing new abrasive grains, and continuously maintaining the sharpness of the abrasive.

[0003] However, metal bond superhard abrasives use bronze, iron, nickel, and cobalt alloys as the main bonding materials. The abrasive holding strength is relatively high, the heat resistance and thermal conductivity are good, the abrasive is difficult to fall off, the tool has poor cutting ability, and it is difficult to repair and sharpen. The abrasive of metal bond abrasives with excellent grinding performance must have good self-sharpening properties, and at the same time have a bond wear that matches the self-sharpening properties of the abrasive. Summary of the invention

[0004] The invention provides a novel metal binder and a preparation method and application thereof, which solve the problems of poor cutting ability, difficulty in dressing and sharpening, easy chip adhesion, etc. of superhard abrasive tools prepared with existing metal binders.

[0005] The technical solution of the present invention is achieved as follows: a new type of metal binder is composed of the following raw materials in percentage by mass: Cu 45-90%, Sn 5-50%, ZrH 2 Powder 1-30%; the sum of the mass fractions of each component is 100%.

[0006] Further, Cu is Cu powder, and Sn is Sn powder; or Cu and Sn come from Cu-Sn alloy powder; or Cu and Sn partially come from Cu-Sn alloy powder, and the rest come from Cu powder and Sn powder.

[0007] Furthermore, Cu powder, Sn powder, Cu-Sn alloy powder and ZrH 2 The particle size of the powder is 0.5 to 63 μm.

[0008] A method for preparing a novel metal binder, which comprises mixing the metal binders uniformly according to a mass ratio.

[0009] Application of a new type of metal binder in the preparation of abrasive tools.

[0010] Beneficial effects of the present invention:

[0011] The metal binder of the present invention solves the self-sharpening ability of superhard abrasive tools such as grinding wheels by introducing pores, so that the prepared abrasive tools have excellent self-sharpening, good sharpness and long service life. At the same time, the pores provide more chip holding space, improve the heat dissipation performance of abrasive tools such as grinding wheels, and improve the grinding performance of the abrasive tools.

[0012] In the metal binder of the present invention, ZrH 2 Can be decomposed into metal elements Zr and H during sintering 2 , forming an alloy of Cu, Sn, Zr and other elements and forming pores. 2 Zirconium hydride powder can release hydrogen at 300-780℃. Hydrogen, as a reducing gas, can reduce oxidized metals. At the same time, the process of hydrogen discharge is also the process of forming gas channels, which can introduce pore structures into metal binders. The addition of Zr elements can refine the grain structure and pin the second phase, thereby improving the holding strength of the alloy on the abrasive. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 : is an optical microscope photograph of the abrasive tool prepared in Example 1. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Embodiment 1:

[0017] A new type of metal binder in this embodiment is composed of the following raw materials in percentage by mass: 50% Cu powder, 30% Sn powder, and ZrH 2 The powder is 20%; the sum of the mass fractions of each component is 100%; the particle size range of the above raw materials is 53-63 μm. The above raw materials are weighed according to the mass ratio and mixed evenly by a mechanical mixing method.

[0018] Diamond abrasive is added to the metal bond, and a metal bond grinding wheel (such as Figure 1 (shown) ， With more pores; compared with the performance of traditional metal products as shown in the following table, it shows excellent self-sharpening (low dressing frequency), good sharpness (low spindle load) and long service life (high grinding ratio).

[0019] Performance comparison between Example 1 and conventional metal bond diamond products

[0020]

[0021] Embodiment 2:

[0022] A new type of metal binder in this embodiment is composed of the following raw materials in percentage by weight: 80% CuSn40 alloy powder, 80% ZrH 2 The powder is 20%; the sum of the mass fractions of each component is 100%; the particle size range of the above raw materials is 53-63 μm. The above raw materials are weighed according to the mass ratio and mixed evenly by a mechanical mixing method.

[0023] Embodiment 3:

[0024] The novel metal binder of the present embodiment is composed of the following raw materials in percentage by weight: 20% CuSn20 alloy powder, 40% copper powder, 20% tin powder, and 20% ZrH 2 The powder is 20%; the sum of the mass fractions of each component is 100%; the particle size range of the above raw materials is 53-63 μm. The above raw materials are weighed according to the mass ratio and mixed evenly by a mechanical mixing method.

[0025] Embodiment 4:

[0026] The novel metal binder of the present embodiment is composed of the following raw materials in percentage by weight: 20% CuSn20 alloy powder, 40% copper powder, 20% tin powder, and 20% ZrH 2 The powder is 20%; the sum of the mass fractions of each component is 100%; the particle size range of the above raw materials is 10-20 μm. The above raw materials are weighed according to the mass ratio and mixed evenly by manual mixing method.

[0027] Embodiment 5:

[0028] A new type of metal binder in this embodiment is composed of the following raw materials in percentage by weight: 35% CuSn40 alloy powder, 40% copper powder, 20% tin powder, and ZrH 2 The powder is 5%; the sum of the mass fractions of each component is 100%; the particle size range of the above raw materials is 10-20 μm. The above raw materials are weighed according to the mass ratio and mixed evenly by manual mixing method.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of metal binder, characterized in that: The invention is composed of the following raw materials in percentage by mass: 45-90% Cu, 5-50% Sn and 1-30% ZrH2 powder; the sum of the mass fractions of the components is 100%.

2. A novel metal binder according to claim 1, characterized in that: Cu is Cu powder, and Sn is Sn powder; or Cu and Sn come from Cu-Sn alloy powder; or Cu and Sn partially come from Cu-Sn alloy powder, and the rest come from Cu powder and Sn powder.

3. A novel metal binder according to claim 2, characterized in that: The particle sizes of Cu powder, Sn powder, Cu-Sn alloy powder and ZrH2 powder are all 0.5 to 63 μm.

4. The method for preparing the novel metal binder according to any one of claims 1 to 3, characterized in that: Mix evenly according to the mass ratio.

5. Use of the novel metal binder according to any one of claims 1 to 3 in the preparation of abrasive tools.

Images