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What type of vacuum furnace annealing
Relaxation annealing heat treatment:
Annealing heat treatment is the main purpose, is that clear for forging, casting, machining or welding residual stress, the residual stress, often results in the decrease of strength of artifacts and deformation, and have a bad effect on the material toughness, ductility, so the chi force annealing heat treatment for strict size longitude artifacts, there are security concerns of mechanical components is very important. The annealing heat treatment procedure is to heat the workpiece to the appropriate temperature below the A1 point, and maintain it for a period of time (not as long as the annealing of annealing) to cool to room temperature. It is particularly important to note that the speed of heating is slow, especially for large objects or complex workpieces. Otherwise, the effectiveness of the stress annealing will be greatly reduced.
Softening annealing heat treatment:
Softening annealing heat treatment, heat treatment procedure is within the scope of the workpiece heated to 600 ℃ to 600 ℃ (A1 temperature below), maintain air cooling after a period of time, its main purpose is to make to work hardening workpiece soften again, reply the original toughness, so as to further processing. This method of heat treatment is often repeated in the cold process, so it is called process annealing. Most metals after cold working, material strength and hardness will grow along with the processing capacity increasing, and therefore lead to reduced ductility and material of the brittle material, if you need any further processing, must first by the softening annealing heat treatment to continue processing.
Is the main purpose, hopes that by heat treatment to make steel material internal laminar or condensation of carbide network become a ball, to improve the cutting performance of steel and plastic processing, especially of high carbon tool steels are the annealing treatment.