Titanium metal exhibits three unique and fundamental characteristics during the heating process that are important for its processing and application.
First, titanium has a relatively low thermal conductivity compared to common metals such as copper, aluminum, iron and nickel. This means that under the same heating conditions, titanium metal transfers heat at a slower rate. More specifically, the thermal conductivity of titanium alloys decreases as the temperature increases. This characteristic means that when heating titanium alloys using surface heating methods, it takes longer to achieve the desired heating effect. Especially for large billets, due to their large size, the internal heat transfer during heating is more difficult, so the temperature difference between the sections will be relatively large, which increases the complexity of the heating process and the requirements of the heating equipment.
Secondly, titanium alloy will react with oxygen, nitrogen and other gases at high temperature to form a layer of oxide skin and gas absorption layer. This gas-absorbing layer not only affects the appearance quality of titanium alloy, but more importantly, deteriorates its processing performance. For example, the gas-absorbing layer will lead to more heat and friction when titanium alloy is cut and machined, which will increase tool wear and metal loss. As a result, intermediate machining is often required to remove this air-absorbing layer during the machining of titanium alloys, which undoubtedly increases production costs and machining difficulties.
Finally, titanium absorbs large amounts of hydrogen when heated at high temperatures and in a reducing atmosphere. Hydrogen is a harmful element to the performance of titanium alloys, it will lead to the reduction of strength and toughness of titanium alloys, and even produce cracks and other defects. Therefore, the atmosphere conditions must be strictly controlled during the heating process to prevent the titanium alloy from absorbing hydrogen exceeding the standard. Once the hydrogen content in the titanium alloy exceeds the limit, additional treatment is required to remove the hydrogen, which again increases production costs and processing cycle time.
In summary, these three characteristics exhibited by titanium during the heating process have a significant impact on its processing and application. In order to obtain high-quality titanium alloy products, it is necessary to have a deep understanding of these characteristics and take corresponding measures to deal with them. Interested friends can continue to pay attention to us to learn more about the knowledge and application skills of titanium metal in production.
