The invention relates to a preparation method of a composite diamond fretsaw, which comprises the following steps: 1, taking protogenetic diamond micro powder with the granularity of 5-45 Mu m and crushed diamond micro powder, mixing uniformly according to the proportion to obtain mixed diamond micro powder; taking the mixed powder of tungstic oxide powder and molybdenum powder as well as the mixed diamond micro powder, and mixing uniformly according to the proportion; 2, heating the product generated in step 1 and leading in rinsed hydrogen to form a diamond micro powder matrix / tungsten-molybdenum carbide interface / surface-metallized mixed diamond micro powder of tungsten-molybdenum alloy; and 3, taking electronickelling watt solution added with the surface-metallized mixed diamond micro powder as the electroplate liquid and taking a steel wire rope as a cathode to carry out the composite plating of metallized diamond and matrix nickel on the surface of the steel wire rope so as to obtain the composite diamond fretsaw of the invention The invention has the advantages of simple process and easy operation, the prepared product has good edging performance, excellent wear-resisting compressive property, high processing speed and long service life, the utilization rate of the diamond fretsaw is high, the section flatness and the glossiness are high, the method is suitable for industrial production, and the prepared product is particularly suitable for the cutting processing with high efficiency, high quality and high cost performance on gems and other high-value materials

Preparation method of composite diamond fretsaw

The invention provides a diamond micro-powder plated titanium, nickel-phosphorous and nickel composite diamond wire saw as well as a preparation method thereof, belonging to the technical field of an ultra-hard material tool. A composite structure of diamond micro-powder plated titanium, nickel-phosphorous and nickel is adhered or supported on a diamond wire saw; the composite structure of the diamond micro-powder plated titanium, the nickel-phosphorous and the nickel is provided with the diamond micro-powder on the diamond surface; a titanium (Ti) layer is arranged on the diamond micro-powder; a nickel-phosphorous (NiP) alloy layer is arranged on the Ti layer; and a pure nickel (Ni) layer is arranged on the NiP alloy layer. By creatively improving aiming at the production process of the diamond wire saw, the efficiency of the diamond wire saw in rapid production can be improved. Compared with the normal sanding speed about 2 hours of the traditional electric-plated product tool, the sanding speed is about 0.25 meters per second that the traditional electric-plated product tool cannot reach, after the method provided by the invention is used. Therefore, the wire saw cannot be produced by the traditional process.

Diamond micro-powder plated titanium, nickel-phosphorous and nickel composite diamond wire saw as well as preparation method thereof

The invention relates to a diamond compound body and a diamond surface metallization method. In particular, the invention provides a diamond compound body; the diamond compound body comprises a diamond particle and a compound coating layer bonded on the surface of the diamond particle, wherein the compound coating layer consists of a boron carbide nanometer layer and a boron alloy nanometer layer; the boron carbide nanometer layer is bonded on the surface of the diamond particle; and the boron alloy nanometer layer is combined with the boron carbide nanometer layer. The compound body material has excellent performance and wide application.

Diamond compound body and diamond surface metallization method

The invention relates to a diamond compound body and a preparation method thereof. In particular, the invention provides a diamond compound body and a preparation method thereof. The compound body comprises a diamond particle, and a compound nanometer coating layer bonded on the surface of the diamond particle. The compound nanometer coating layer comprises a coating layer (a): a boron carbide nanometer coating layer; and a coating layer (b): a boron nanometer coating layer, a boron nitride nanometer coating layer or a combination thereof, wherein the coating layer (a) is bonded on the surface of the diamond particle, and the coating layer (b) is bonded on the surface of the coating layer (a). The compound body has the advantages of excellent material performance and wide application.

Diamond compound body and preparation method thereof

The invention belongs to the technical field of powder metallurgy and relates to a preparation method for double-coated-layer diamond powder. A layer of uniform wolfram carbide (WC) is coated on the diamond surface through the salt bath coating technology to improve the wettability of diamond and copper; then coppering is continuously conducted on the surface of the WC layer through a chemical coating method; and the thickness of a copper coated layer is controlled by controlling the content of Cu2+ in a coating solution, and accordingly the double-coated-layer CU-WC-diamond powder with the copper-containing volume fraction being 30-50 vol.% is prepared. The powder can be directly pressed to form (Diamond/Cu) composite parts, and near-net forming of the complex-shaped metal matrix composite parts is realized. The preparation method has the advantages that the CU-WC-diamond powder can be prepared by controlling the thickness of the copper coated layer, and the copper coating amount of the prepared CU-WC-diamond powder is the copper content of a Diamond/Cu composite formed by pressing the powder, so that the prepared composite is uniform in diamond distribution, high in bonding strength and excellent in performance.

Preparation method for double-coated-layer diamond powder

By using such processes as depositing, electroplating and metallurgical chemical cladding, etc., three layers-metallic carbide film, alloy surface layer as well as electroplating metal skin, are cladded on the diamond surface. That overcomes the difficulty that diamond can not adhesive to and be wetted by ordinary low-m.pt. alloys. The metallized diamond can be used and preserved in the same way as ordinary metal powder-granules, so that the lifespan of tool made of this diamond is laygely prolongated.

林增栋

Papers

Diamond surface metallization technique