Research for using carbide cutting tools with different coatings

Carbide cutting tools of coating is a key process in coated tools production and processing, the cutting performance and service life of the coated tools, surface quality and machining efficiency and machining precision has an important influence. At present, such as backing down coated TiN coating technology are mainly monopropellant coating and (Ti, Al, Zr, Cr) N more groups of yuan composite coating of coating is given priority to, with the continuous development of coating and coating technology,the type of diamond coating,coating and nano coating the emergence of many new coating technology and application of back coating technology development needs in order to satisfy the demands of the new industrial production. This article from the physical backing down with both coating and chemical characteristics of back coating technology are introduced briefly and the research progress of and the trend of the development of new methods for coating coated back has carried on the preliminary discussion.

Return a coating process

Coating materials including carbon nitride, carbide and nitride, oxide, boride, silicide, diamond composite coating and the eight types of dozens of varieties. Application is the most common single-layer coating on TiN, TiCN coating, TiAlN coatings, CrN coating, DLC (diamond-like) coating and diamond coating, etc. For different coating material and structure, take back coating process is not the same. In actual production application, backing down paint coating technology mainly include physical and chemical coating back two kinds big.

1. The physical coating

Physical withdrawal refers to the use of mechanical method coating layer removed from the body, the physical back membrane methods mainly include sandblasting, grinding machining. Applicable to the unfavorable in the chemical solution for base material and the surface finish requirements is not high, the requirements for dimensional accuracy is not high and the surface shape is simple and easy to grinding and carbide cutting tool.

2. The chemical coating back

Chemical coating is back in remission of acidic or alkaline chemical solution to dissolve coating alloy coating on the surface of the coating solution and carbide cutting tool back up chemical reactions. Solution of back membrane compounds requires complex and function, make the coating from the body in a timely manner after lax to form complex and content from the cutting tool or workpiece separation matrix, and the residue, not on the tool body attached mixture recovery tool matrix in the true nature of before coating. This method is widely used in coating of coating method.

Chemical backing down with coating process are mainly chemical and electrolytic coating back, these two kinds of back coating technology is back coating solution and coating produced by using the principle of chemical reaction.