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Bright annealed stainless steel 304

Bright annealing is usually called bright annealing. It is mainly used to heat in a closed space and cool the temperature slowly in the closed space. After annealing, at least 500 degrees of natural cooling will produce brilliance and will not cause decarburization.

Typical solution treatment of 300 series austenitic stainless steel heat treatment process. In the process of heating, dissolved carbon in austenite, heating to 1050 ~ 1150 ℃, the appropriate heating to a short period of time, all of the carbon dissolved in austenite, and then quickly cooled to below 350 ℃, the one-way uniformity of supersaturated solid solution. This is the key to therapeutic cooling. Heat treatment process, the cooling speed requirements to 55 ℃ / s, dissolve quickly after add carbide temperature (550 ~ 850 ℃). Keep time as short as possible, otherwise coarse grain, surface finish effect.


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