Diamond saw blade

Abstract

The invention discloses a diamond saw blade, which belongs to the technical field of diamond tools. The base material of the saw blade is 30CrMo steel, and the diamond cutter head is made by mixing the raw material powder evenly, then cold pressing and hot pressing sintering; in terms of parts by weight, the composition of the raw materials used for the diamond cutter head is: copper 18‑28 35-45 parts of iron, 3-18 parts of nickel, 2-10 parts of cobalt, 2-10 parts of tin, 3-12 parts of rare earth, 5-10 parts of WC powder; 0.4-1.2 parts of liquid paraffin, 0.8-2.1 parts of diamond parts; the rare earth is Y or La powder. The reliable connection between the cutter head and the substrate is realized by optimizing the material composition of the cutter head and the structure of the saw blade, and embedding the cutter head into the saw blade matrix by means of cold pressing connection.

Description

Technical field: [0001] The invention relates to the technical field of diamond tools, in particular to a diamond saw blade. Background technique: [0002] In the environment of global economic development, multi-function, convenience and professionalism have become the direction of tool product research and development, especially in the fields of engineering construction and stone carving, which are more needed. [0003] Diamond saw blade is a sawing tool, which is widely used in the cutting of hard and brittle materials such as concrete, refractory materials, stone materials, and ceramics. The diamond saw blade is mainly composed of a matrix and a cutter head. The cutter head is generally composed of a matrix alloy and a certain proportion of diamond particles. The cutting of diamond particles, stone, etc. is realized by the holding force of the matrix alloy on the diamond particles. In order to improve the cutting performance and service life of diamond saw blades and r...

AI Technical Summary

Problems solved by technology

The traditional high-frequency welding is to braze the cutter head on the substrate, and the joint surface of the cutter head is connected by melting and penetrating the brazing material. The heat-affected zone is wide, the high-temperature strength is low, and the bearing capacity is poor. It is not suitable for occasions requiring high temperature and high strength.

[0006] The technology of laser welding is relatively mature, which can better fuse the diamond cutter head and the steel substrate, with high bonding strength and small heat-affected zone, which overcomes the phenomenon of blade shedding, but because the cutter head and the saw blade substrate are heterogeneous Materials, various properties vary greatly, so a transition layer needs to be prepared during laser welding. At the same time, in order to obtain sufficiently high welding strength and good weld quality, it is necessary for the cutter head, saw blade base and transition layer to have a reasonable formula and The optimal sintering temperature, if the composition of the cutter head and the transition layer is too different, it is easy to break at the junction due to uneven heat and force; Pores, voids, etc. appear, resulting in low welding strength, which cannot meet the requirements of use. Therefore, the development cost and scrap rate of saw blades prepared by laser welding are high, and the process is complicated

[0007] In addition, the existing ordinary circular saw blades can only cut straight lines, but when digging round holes on stone countertops or engraving various shapes on the stone surface, the saw blades are required to be able to perform free bending cutting, which is not yet possible.

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