Coating types for Hss blade

The coated saw blade is obtained by coating a thin layer of refractory metal with good wear resistance on the surface of a high-speed steel (HSS) substrate with good strength and toughness by vapor deposition. As a thermal barrier and chemical barrier, the coating reduces the thermal diffusion and chemical reaction between the saw blade and the workpiece, and has high surface hardness, good wear resistance, stable chemical properties, heat and oxidation resistance, low friction coefficient and thermal conductivity. Due to its low characteristics, the life of the saw blade can be increased by several times compared to the uncoated saw blade during cutting. Therefore, the coated saw blade has become the symbol of modern cutting saw blades.

Full high-speed steel saw blade, the color is white steel, it is an uncoated saw blade, which can cut general non-ferrous metals, such as brass, aluminum, etc.

1.Nitriding coating (black) VAPO nitriding coating high temperature oxidation heat treatment, the color is dark black, after the chemical element Fe3O4 is subjected to precise special heat treatment, an oxide layer (Fe3O4) is formed on the surface, and the thickness of the oxide layer is about 5-10 Micron, surface hardness is about 800-900HV, friction coefficient: 0.65, the surface smoothness of this saw blade is good, which helps to enhance the self-lubricating ability of the saw blade, and the phenomenon that the saw blade is stuck by the material can be avoided to a certain extent. For cutting general materials. Due to its mature processing technology and high cost performance, it is widely used in the market.

2.Titanium Nitride Coating (Gold) After TIN is treated with PVD Nitrogen Titanium, the thickness of the saw blade coating is about 2-4 microns, the surface hardness is about 2200-2400HV, the friction coefficient: 0.55, and the cutting temperature: 520℃. The blade can greatly improve the service time of the saw blade. In order to make full use of its characteristics, the cutting speed should be increased to reflect its value. The main function of this coating is to make the saw blade more resistant to cutting. For the cutting of general materials, its excellent performance can effectively improve the cutting speed and reduce the loss.

3.Chromium nitride coating (referred to as super coating) CrN This coating is particularly resistant to sticking, corrosion and oxidation. The thickness of the saw blade coating is 2-4 microns, the surface hardness is 1800HV, the cutting temperature is lower than 700℃, and the color is metallic gray. It is strongly recommended to use when cutting copper and titanium, and the coating process has no impact on the environment. Suitable for cutting copper, aluminum and other materials, with high coating density and surface hardness, as well as the relatively low friction factor of all coatings.

4.Titanium aluminide nitride coating (color) TIALN This is a new multi-layer anti-wear coating. The saw blade treated with multi-layer PVD coating achieves a very low coefficient of friction. Its surface hardness is about 3000-3300HV, and the friction Coefficient: 0.35, Oxidation temperature: 450℃, this kind of saw blade can make the cutting surface very smooth, the saw blade is more wear-resistant, the recommended cutting speed and feeding speed are relatively high and the cutting tensile strength is over 800 N/mm2 materials, such as Stainless steel, etc., are used under particularly harsh working conditions.

5.Aluminum titanium nitride coating (referred to as super A coating) ALTIN This is a new multi-layer composite anti-wear coating, the thickness of this coating is 2-4 microns, surface hardness: 3500HV, friction coefficient: 0.4, cutting temperature Below 900℃, it is recommended to use materials (such as stainless steel) with high cutting speed and feed speed and cutting tensile strength exceeding 800 N/mm2, and use in particularly harsh working conditions such as dry cutting. Due to the toughness and good physical stability of the aluminum titanium nitride coating, the saw blade is more wear-resistant and suitable for cutting all steels. Due to its low friction coefficient and low thermal conductivity, it is especially suitable for dry cutting at high speed and high temperature. .

6.     Titanium Carbonitride Coating (Bronze) TICN This is a coating suitable for more demanding anti-wear requirements. Recommended for cutting materials with a tensile strength of more than 800 N/mm2. The coating thickness is 3 microns, the friction coefficient: 0.45, the oxidation temperature: 875°C, and the surface hardness is about 3300-3500HV. It is not only suitable for cutting high-strength steel such as stainless steel, but also for cutting softer materials such as cast iron, aluminum alloy, brass and copper. Due to its low friction coefficient and low thermal conductivity, it is especially suitable for high-speed and high-temperature cutting. dry cut.