Titanium alloy parts processing what matters needing attention?

The pressure processing of titanium alloy has more similarities with steel processing than with non-ferrous metal and alloy processing. Many process parameters in calcination, volume stamping and plate stamping of titanium alloy are close to those in steel processing. However, there are also some important characteristics that must be paid attention to in the pressure processing of Chin and Chin alloys.

Although titanium and titanium alloys are generally considered to contain hexagonal lattices with low plasticity during deformation, various pressure working methods used for other structural metals are also applicable to titanium alloys. The ratio of yield point to strength limit is one of the characteristic indexes of whether a metal can withstand plastic deformation. The higher the ratio, the worse the plasticity of the metal. For industrial pure TITANIUM under COOLING, the RATIO IS 0.72-0.87, while for carbon steel it IS 0.6-0.65 and for stainless steel it IS 0.4-0.5.

Bulk punching, free calcination and other operations RELATED to the processing of large section and size billets under HEATING conditions (above =yS transition temperature). The calcination and stamping heating temperature range is between 850 °C and 1150°C. Alloy BT; M)0, BG1-0, OT4-0 and OT4-1 have satisfactory plastic deformation under cooling condition. Therefore, the parts made of these alloys are mostly annealed billets without heating and stamping. Titanium alloy in cold plastic deformation, regardless of its chemical composition and mechanical properties, the strength will be greatly improved, and the plasticity is reduced accordingly, so it is necessary to carry out inter-process annealing treatment.

The blade groove wear in titanium alloy machining is the local wear in the back and front along the cutting depth direction, which is often caused by the hardening layer left by the previous machining. The chemical reaction and diffusion between the tool and the workpiece material at the processing temperature over 800℃ is also one of the reasons for the formation of groove wear. Because in the process of machining, titanium molecules of the workpiece accumulate in the front of the blade, under high pressure and high temperature "welding" to the blade, forming a chip tumor. As the lumps peel away from the blade, they remove the carbide coating from the blade.

Due to the heat resistance of titanium, cooling is essential during machining so that the blade and tool surface do not overheat. Use end coolant for optimal chip removal when performing square shoulder milling as well as face milling for pits, cavities or full grooves. When cutting titanium, the chip easily sticks to the blade, causing the next round of milling cutter rotation to cut the chip again, often causing the edge line to break. Each type of blade cavity has its own coolant hole/injection to solve this problem and enhance constant blade performance. Another ingenious solution is threaded cooling holes. Long - edge milling cutters have many blades. Applying coolant to each hole requires a high pump capacity and pressure. On the other hand, it can plug holes that are not needed as needed, thereby maximizing the flow of fluid to holes that are needed.

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