The thermal conductivity of titanium alloy is small, about 1/3 of that of iron, and the heat generated during machining is difficult to release through the workpiece; at the same time, due to its small specific heat, the local temperature rises rapidly during processing. Therefore, it is easy to cause the temperature of the tool to be very high, causing the sharp wear of the tip of the tool and reducing the service life.
The temperature at the tip of the cutting tool for cutting titanium alloys is 2-3 times higher than that for cutting steel. The key variables that determine the machinability of titanium alloys include thermal conductivity, elastic modulus, chemical activity, alloy type, and microstructure. The low elastic modulus of titanium alloy makes the machined surface prone to rebound, especially the more serious the springback of the thin-walled parts, which is easy to cause strong friction between the flank and the machined surface, thereby wearing the tool and chipping.
The chemical activity of titanium alloy is very strong, and it is easy to react with oxygen, hydrogen and nitrogen at high temperature, so that the hardness increases and the plasticity decreases, and the mechanical processing of the oxygen-enriched layer formed during heating and forging is difficult. Its alloy composition is different, and its processing performance is also different. In the annealed state, a-type titanium alloy has better machining performance; a+β-type titanium alloy is second; β-type titanium alloy has high strength and good hardenability, but Machinability is poor.
As a professional titanium and titanium alloy products supplier, Shaanxi Etermetal Co., Ltd. can not only provide you with qualified products, but also provide you with customized services. If you have related needs or questions, welcome your consultation at any time!
