Titanium Coated Drill Bits High Hardness, Good Wear Resistance

Titanium Coated Drill Bits Through the chemical or physical method to form a film on the surface of the tool, so that cutting tools to obtain excellent comprehensive cutting performance, so as to meet the requirements of high-speed machining; since the early 20th century, the early 1970s since the advent of hard coating tools,Titanium Coated Drill Bits chemical vapor deposition ( CVD technology and physical vapor deposition (PVD) technology have been developed for the improvement of tool performance to create a new chapter in history. Compared with the uncoated tool, the coating tool has significant advantages: it can greatly improve the cutting tool life; effectively improve the cutting efficiency; improve the machining accuracy and significantly improve the surface quality of the workpiece; effectively reduce the tool Material consumption, reduce processing costs; reduce the use of coolant, reduce costs, conducive to environmental protection.

Coating characteristics

The use of coating technology can not reduce the strength of the tool under the conditions of a substantial increase in the hardness of the tool surface, the current hardness can be achieved close to 100GPa;

With the rapid development of coating technology, the chemical stability of the film and high temperature oxidation resistance is more prominent, so that high-speed machining possible.

Lubricating film has good solid-phase lubrication performance, can effectively improve the processing quality, but also suitable for dry cutting;

Coating technology as the final process of tool manufacturing, the tool accuracy is almost no impact, and can be repeated coating process.

Commonly used coatings

Titanium Coated Drill Bits Titanium Coated Drill Bits (TiN) is a versatile PVD coating that increases tool hardness and has a high oxidation temperature. The coating is used for high speed steel cutting tools or forming tools to obtain very good processing results.

The chromium nitride coating CrN coating has good resistance to adhesion and makes it the preferred coating in the process of producing chips. With this virtually invisible coating, the machining performance of high speed steel tools or carbide cutting tools and forming tools will be greatly improved.

Titanium Coated Drill Bits Diamond-coated CVD diamond coating provides the best performance for non-ferrous metal processing tools, ideal for processing graphite, metal matrix composites (MMC), high silicon aluminum alloys and many other high abrasive materials (Note: Pure Diamond-coated tools can not be used to process steel, because the processing of steel will produce a lot of cutting heat, and lead to chemical reactions, so that between the coating and the adhesive layer was damaged).

Titanium Coated Drill Bits Titanium Carbide Titanium Carbide (TiCN) coating added to the carbon element can improve the hardness of the tool and get better surface lubrication, is the ideal high-speed steel cutting tool.

The aluminum oxide layer formed in the TiAlN / AlTiN coating (TiAlN / AlTiN) coating can effectively improve the high temperature processing life of the tool. Mainly used for dry or semi-dry machining of carbide cutting tool can be used for the coating. Depending on the ratio of aluminum and titanium contained in the coating, the AlTiN coating provides a higher surface hardness than the TiAlN coating, so it is another viable coating option for high speed machining.

Tool coating performance

Titanium Coated Drill Bits (TiCN) coatings have a higher hardness than Titanium Coated Drill Bits (TiN) coatings. Due to increased carbon content, the hardness of TiCN coating increased by 33%, the hardness range of about Hv3000-4000.

CVD diamond coating surface hardness up to Hv9000, the application of the coating in the tool has been more mature, compared with the PVD coating tool, CVD diamond coating tool life increased by 10-20 times. The high hardness of the diamond-coated tool makes the cutting speed 2-3 times higher than that of the uncoated tool. The CVD gold oxide temperature refers to the temperature at which the coating begins to decompose. The higher the oxidation temperature, the more favorable the cutting process under high temperature conditions. Although the hardness of TiAlN coating may be lower than that of TiCN coating, it is proved that it is much more effective than TiCN in high temperature processing. The reason why TiAlN coatings can remain at high temperatures at high temperatures is that an alumina can be formed between the tool and the chip, and the alumina layer can transfer heat from the tool to the workpiece or chip. The cutting speed of the cemented carbide tool is usually higher than that of the high speed steel tool, which makes TiAlN the preferred coating for the cemented carbide tool. The cemented carbide bit and the end mill are usually made of this PVDTiAlN coated stone coating The tool becomes a good choice for cutting non-ferrous and non-metallic materials.

The hard film on the surface of the tool has the following requirements: ① high hardness, good wear resistance; ② chemical stability, not with the workpiece material chemical reaction; ③ heat and oxidation resistance, low friction coefficient, and the substrate attached to a solid and so on. A single coating material is difficult to achieve all of the above technical requirements. The development of coating materials has been developed by TiN / NbN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN, TiN / CN, and other multi-composite film materials, the performance of the tool coating has been greatly improved.