The following matters need to be paid attention to when forging titanium alloy bolts:
Raw material selection
1. Select high-quality titanium alloy materials, ensure that the chemical composition meets national standards, and strictly control the impurity content to ensure the mechanical properties and service life of the bolts.
2. The surface of the raw materials should be smooth, free of cracks, oxide scale and other defects to ensure that no cracks and inclusions are generated during the forging process.
3. The raw materials should be homogenized to eliminate internal stress and reduce the difficulty of forging.
Forging temperature control
1. The forging temperature range of titanium alloy bolts is relatively narrow, generally between 950℃ and 1200℃. Too high temperature will lead to coarse grains, reduced mechanical properties, and even cracks; too low temperature will lead to difficulty in plastic deformation and poor forging effect.
2. When heating, the temperature in the furnace should be uniform to avoid local overheating or underheating. The temperature controller can be used to monitor and adjust the temperature in the furnace in real time.
3. During the forging process, the forging speed must be strictly controlled to avoid too fast a temperature drop, which will affect the forging effect.
Mold design and selection
1. The mold design should be reasonable to ensure that the shape and size of the bolt meet the requirements. The mold cavity should be smooth and burr-free to avoid scratching the surface of the titanium alloy.
2. Select high-temperature mold materials, such as tungsten-cobalt alloy, high-speed steel, etc., to withstand the high temperature and high pressure during the forging process.
3. The mold lubricant should have good high-temperature performance to prevent the mold from bonding with the titanium alloy.
Forging process parameter control
1. Forging ratio: Reasonably control the forging ratio to ensure uniform internal structure and stable mechanical properties of the bolt. The general forging ratio is 2-3 times.
2. Deformation speed: Appropriately reduce the deformation speed to avoid cracks. For titanium alloy bolts, the deformation speed should be controlled at 0.01-0.1m/s.
3. Deformation degree: During the forging process, the deformation degree should be gradually increased to fully refine the internal structure of the titanium alloy bolt.
Post-forging treatment
1. After forging, solid solution treatment and aging treatment should be carried out in time to eliminate internal stress and improve the mechanical properties of the bolt.
2. Grind and polish the forged surface to remove defects such as scale and burrs to ensure the surface quality of the bolt.
3. Perform non-destructive testing to ensure that there are no cracks, inclusions and other defects inside the bolt.
Safety in production
1. During the forging process, operators should wear protective equipment to prevent high-temperature titanium alloy from splashing and injuring people.
2. Strictly abide by the forging process regulations to ensure the normal operation of the equipment.
3. Regularly inspect and maintain the equipment to ensure safe production.
In short, forging titanium alloy bolts requires attention to raw material selection, forging temperature control, mold design and selection, forging process parameter control, forging post-processing and safe production. Only by strictly controlling each link can high-quality titanium alloy bolts be produced to meet the high-end needs of various fields.
