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Do titanium alloy products indicate a desire to become more beautiful? Polishing is a crucial step that cannot be separated from

Polishing is the process of removing defects and unevenness on the surface of titanium alloys through mechanical methods, improving surface smoothness and smoothness. The main purpose of titanium alloy polishing is to improve its surface quality and aesthetics, while also improving its corrosion resistance and biocompatibility.
Titanium is a new type of metal, and its properties are related to the impurity content of carbon, nitrogen, hydrogen, oxygen, etc. Pure titanium iodide has an impurity content of no more than 0.1%, but its strength is low and its plasticity is high. The performance of 99.5% industrial pure titanium is as follows: density ρ=4.5g/cubic centimeter, melting point 1725 ℃, thermal conductivity λ=15.24W/(m.K), tensile strength σ b=539MPa, elongation δ=25%, reduction of area ε=25%, elastic modulus E=1.078 × 105MPa, hardness HB195.
Titanium has high chemical reactivity, low thermal conductivity, high viscosity, low mechanical grinding to grinding ratio, and is prone to reaction with abrasive tools. Ordinary abrasives are not suitable for grinding and polishing titanium. Instead, superhard abrasives with good thermal conductivity, such as diamond and cubic boron nitride, should be used. The polishing wheel speed is generally 900-1800m/min. It is advisable, otherwise, the titanium surface is prone to grinding burns and microcracks. All titanium alloy jewelry, watch straps, bracelets, and other titanium alloy products have certain difficulties in polishing, requiring specialized polishing materials to polish the surface bright.
The thermal conductivity of titanium is λ=15.24W/(m.K), which is about 1/4 of nickel, 1/5 of iron, and 1/14 of aluminum. However, the thermal conductivity of various titanium alloys is about 50% lower than that of titanium. The elastic modulus of titanium alloy is about half of that of steel, so it has poor rigidity and is prone to deformation. It is not suitable for making slender rods and thin-walled parts. The amount of rebound on the machined surface during cutting is large, about 2-3 times that of stainless steel. So there are certain difficulties in polishing.
Titanium alloy polishing process flow
1. Surface pretreatment: Use methods such as acid washing and electrolytic polishing to remove harmful substances such as surface rust and oxide layers, making the surface clean and smooth.
2. Grinding: Mechanical or manual grinding is used to remove surface burrs, unevenness, and defects.
3. Polishing: Mechanical or chemical polishing methods are used to improve the surface smoothness to a certain level.
4. Sandblasting treatment: Spray abrasive on the surface to remove dirt and defects.
5. Cleaning: Clean with water or solution to remove residual sandblasting abrasives and polishing agents, ensuring a clean and smooth surface.
6. Surface treatment: According to different requirements and uses, the surface is treated with electroplating, anodizing, etc. to improve its corrosion resistance and decorative properties.
Mechanical polishing (rough polishing, medium polishing, precision polishing, mirror polishing)
Polished Heart Dimension Pure Titanium Mirror Surface Titanium Chopsticks
1: Coarse polishing: Use a special hemp or wool wheel made of titanium alloy and a special titanium wax for polishing to achieve a smooth surface of the product. Pay attention to the intensity of polishing and the direction of product polishing.
2: Middle polishing: Use a titanium alloy specific polishing coarse cloth wheel or fine wool wheel with titanium alloy specific middle polishing wax for polishing, remove the wrinkles left by rough polishing, and ensure that the surface of the product has brightness.
3: Fine polishing: Use titanium alloy specific cotton cloth wheels and titanium alloy specific fine polishing wax to achieve high brightness of titanium alloy products. There are still some slight fabric patterns on the surface of the product.
4: Mirror polishing: Use titanium alloy specific bleached cotton cloth wheels and titanium alloy specific mirror wax to polish and remove slight texture on the surface of the product, so that the titanium alloy has a mirror finish.
Chemical polishing
Chemical polishing is achieved by the oxidation-reduction reaction of metals in a chemical medium to achieve the purpose of leveling and polishing.
Its advantage is that chemical polishing is independent of the hardness, polishing area, and structural shape of the metal. All parts in contact with the polishing solution are polished without the need for special and complex equipment. It is easy to operate and is more suitable for polishing complex titanium denture brackets. However, the process parameters of chemical polishing are difficult to control, and it is required to have a good polishing effect on dentures without affecting their accuracy.
Conclusion
The polishing process of titanium alloy is a crucial process, which is of great significance for improving the surface quality and aesthetics of titanium alloy. During the polishing process, attention should be paid to the control of various technical parameters and the improvement of personnel quality, continuously improving the level and quality of polishing technology to meet the needs of different industries and fields for titanium alloy materials.

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