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What Should Be Paid Attention To in The Heat Treatment Of 304 Stainless Steel Plate?

Jun 03, 2021

The uneven thickness of the surface oxide scale of the 304 stainless steel plate will cause the metal surface to have a different finish, and during pickling, the dissolution of the surface oxide layer and the degree of corrosion of the body metal at the attachment site of the oxide scale are different. Therefore, When the 304 stainless steel plate is heat treated, it must be uniformly formed into an oxide scale.


304 stainless steel plate


The local heat treatment of the 304 stainless steel plate processing parts has residual oxide scale. After heating, the remaining oxide layer and the portion without oxide layer will have differences in the thickness and composition of the oxide layer, and then cause the surface after pickling. The unevenness.


There is a difference between the oxide scale produced on the stainless steel surface directly contacted by the flame of gas or oil and the place where there is no contact. Therefore, when heating, the treatment part should not directly touch the flame port.


When stainless steel is heated, oil is attached to the surface of the workpiece, and the composition of the oxide scale thickness of the oil-attached part and the oxide layer thickness of other parts is different, and carburization will occur.


If there are impurities on the surface of stainless steel, especially when organic matter or ash adheres to the workpiece, heating will affect the oxide layer.


The difference of the atmosphere in the stainless steel plate furnace will also cause a certain change in the formation of oxide scale, and it is also the cause of unevenness after pickling.