What are the advantages and characteristics of CNC machining of titanium alloy? Below, the editor will explain to you

In titanium alloy processing, titanium alloy has low density, high specific strength (strength/density), good corrosion resistance, high heat resistance, good toughness, plasticity, and weldability. Currently, titanium alloy has been widely used in many fields such as aerospace, automotive, medical, sports equipment, and electrolysis industry. However, the poor thermal conductivity, high hardness, and low elastic modulus also make titanium alloy a difficult metal material to process. This article summarizes some process measures in titanium alloy cutting based on its process characteristics

Advantages of CNC machining of titanium alloy:

Main advantages: 1. Titanium alloy has high strength, low density (4.4kg/dm3), and light weight, providing a solution for reducing the weight of some large structural components.

2. High thermal strength. Titanium alloys can maintain high strength and work stably at 400-500 ℃, while aluminum alloys can only work at temperatures below 200 ℃

3. Compared with steel, the inherent high corrosion resistance of titanium alloy can save the cost of daily operation and maintenance of aircraft.

Processing characteristics of titanium alloy CNC:

The special characteristic of CNC machining of titanium alloy is low thermal conductivity. TC4 has a thermal conductivity of l=16.8W/m at 200 ℃? ℃, is the thermal conductivity 0.036 kcal/cm? A second? ℃ is only 1/4 of steel, 1/13 of aluminum, and 1/25 of copper. Poor heat dissipation and cooling effect during cutting process shorten the tool life.

2. Low elastic modulus leads to large rebound on the machined surface of the part, resulting in an increased contact area between the machined surface and the back cutting surface of the tool, which not only affects the dimensional accuracy of the part but also reduces the durability of the tool.

3. Hardness factor. Titanium alloys with low hardness values will become sticky during processing, and chips will stick to the cutting edge near the front cutting surface of the tool, forming chip deposits that affect the machining effect; High hardness titanium alloys are prone to tool chipping and abrasion during processing. These characteristics result in a low metal removal rate of titanium alloy, only 1/4 of steel parts, and much longer processing time than steel parts of the same size.

4. Strong chemical affinity. Titanium can not only undergo chemical reactions with the main components of nitrogen, oxygen, carbon monoxide, and other substances in the air, forming TiC and TiN hardening layers on the alloy surface, but also react with the tool material under high temperature conditions generated by cutting, reducing the durability of the tool.

5. Poor safety performance during cutting process. Titanium is a flammable metal, and the high temperature and sparks generated during micro cutting may cause the combustion of titanium chips.