I have found out that in some research journals, people have reported solution heat treatment of 17-4 PH stainless steel at 1040 C for 30 min and quenching in air ( Air cooling) whether some of them reported heating at 1040 for 1 hr than water quenched. Kindly answer me which process to be adopted to perform solution heat treatment in case of 17-4 PH stainless steel ??
Do I really have to go for 1hr of solution heat treatment or 30 min will be enough along with which type of quenching is required ( water or Air quenching) ??
The recommended heat-treatment of 17-4 PH stainless steel is as follows: Solution treatment is performed at 1040 °C for 1 h followed by water quenching. subsequently, aging could be conducted at low temperatures followed by air cooling to enhance precipitation and the relevant mechanical properties.
17-4 PH stainless steel is heat treated at 1040 °C for 1 hour followed by air cool or faster to below 32 °C (cooling cycle should completed within one hour). Aging can be done at 480-600°C depending on the hardness requirement (lower the aging temperature the higher the hardness)
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