What should be paid attention to in heat treatment of 304 stainless steel plate?

　　The surface quality of 304 stainless steel is mainly determined by the pickling process of heat treatment. If the surface oxide layer formed by the previous heat treatment process is thick or the structure is uneven, the surface finish and surface finish cannot be improved if pickling is used. of uniformity. So, what should be paid attention to in the heat treatment of 304 stainless steel plate?

　　The surface oxide thickness of 304 stainless steel plate is uneven, which will make the metal surface finish different, and during pickling, the dissolution of the surface oxide layer and the degree of corrosion of the body metal at the oxide scale attachment part are different. Therefore, When the 304 stainless steel plate is heat treated, it must be uniformly formed with oxide skin.

　　The local heat treatment of 304 stainless steel plate treatment parts has residual oxide skin. After heating, there will be differences in the thickness and composition of the oxide layer in the part where the oxide layer remains and the part where there is no oxide layer. Then, the surface after pickling will be caused uneven.

　　There is a difference in the oxide scale produced on the stainless steel surface that is directly in contact with the gas or oil flame and the place that is not in contact. Therefore, when heating, make sure that the treated piece does not directly contact the flame port.

　　If stainless steel is heated, oil is attached to the surface of the workpiece, and the composition of the thickness of the oxide layer on the part where the oil is attached is different from the thickness of the oxide layer on other parts, and carburization will occur.

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

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