Improvement and heat treatment process of stainless steel 1.4740 material
A stainless steel and material technology, applied in the field of heat treatment, can solve problems such as uneven structure, long annealing cycle, and uncontrollable hardness, and achieve the effect of uniform structure, elimination of residual stress, and controllable hardness
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[0022] Example 1: A heat treatment process of stainless steel 1.4740 material. The stainless steel 1.4740 material to be treated is normalized at a temperature of 850°C for 5.5 hours, and the carbon potential in the furnace is 0.18. Then, the furnace is directly air cooled to 200°C and taken out.
Example Embodiment
[0023] Embodiment 2: A heat treatment process for stainless steel 1.4740 material. The stainless steel 1.4740 material to be treated is normalized at a temperature of 880° C., holding for 5 hours, and the carbon potential in the furnace is 0.18, and then directly air-cooled in the furnace to 200° C.
Example Embodiment
[0024] Embodiment 3: A heat treatment process for stainless steel 1.4740 material. The stainless steel 1.4740 material to be treated is normalized at a temperature of 900°C, holding for 4.55 hours, and the carbon potential in the furnace is 0.18, and then directly air-cooled in the furnace to 200°C and taken out.
[0025] The obtained as-cast structure chart is as follows figure 1 Shown.
[0026] Compared with the prior art, the invention reduces the hardness, improves the processing efficiency, optimizes the carbide form, and solves the pitting caused by surface decarburization.
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