Since the discovery of titanium in 1790, humans have been exploring for a century to obtain its extraordinary properties. In 1910, humans first produced titanium metal, but the road to applying titanium alloys was long and arduous. It was not until 40 years later in 1951 that industrial production was finally realized.
have the characteristics of high specific strength, corrosion resistance, high-temperature resistance, and fatigue resistance. The weight of titanium alloys of the same size is only 60% of that of steel, but it is stronger than alloy steel. Due to its good properties, titanium alloys have been widely used in aviation, aerospace, power generation, nuclear energy, ships, chemicals, and medical equipment.
The four characteristics of titanium alloys, such as low thermal conductivity, severe work hardening, high affinity with cutting tools, and small plastic deformation, are the essential reasons for the difficulty of titanium alloy processing. Its cutting index is only equivalent to 20% of that of easy-to-cut steel.
The thermal conductivity of titanium alloy is only about 16% of that of 45# steel. The heat cannot be conducted away in time during processing, resulting in a local high temperature of the cutting edge (the tip temperature during processing is more than 1 times that of 45# steel), which easily causes diffuse wear of the tool.
The work-hardening phenomenon of titanium alloy is obvious, and the surface hardening layer is more serious than that of stainless steel, which will cause certain difficulties in subsequent processing, such as increased damage to the tool boundary.
Severe adhesion with titanium-containing cemented carbide.
It is about 1/2 of the elastic modulus of 45 steel, so the elastic recovery is large and the friction is serious. At the same time, the workpiece is also prone to clamping deformation.
(1) Use a blade with a positive angle geometry to reduce cutting force, cutting heat, and workpiece deformation.
(2) Maintain a constant feed to avoid hardening of the workpiece. The tool should always be in the feed during the cutting process. The radial cutting depth during milling should be 30% of the radius.
(3) Use high-pressure and high-flow cutting fluid to ensure the thermal stability of the machining process and prevent surface degeneration of the workpiece and tool damage due to excessive temperature.
(4) Keep the blade edge sharp. Blunt tools are the cause of heat accumulation and wear, which can easily lead to tool failure.
(5) Process titanium alloy in the softest state as much as possible, because the material becomes more difficult to process after hardening. Heat treatment increases the strength of the material and increases blade wear.
Tel: +86-0917- 3664600
Whatsapp: +8618791798690
