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    Stainless steel plate inspection process

    1. Stainless steel plate If oil adheres to the surface of the workpiece during heating, the thickness of the scale at the oil adhering portion and the thickness and composition of the oxide scale in other parts are different, and carburization occurs. The portion of the subcutaneous base metal that is carburized will be severely corroded by acid. When the heavy oil burner starts to incinerate, the oil droplets sprayed on the workpiece will have a great influence. Therefore, the operator should not touch the stainless steel piece by hand, and do not let the workpiece stain with new oil.
    2. If there is lubricating oil attached to the surface of the workpiece during cold working, it is necessary to degrease in the trichloroethylene degreaser and caustic soda solution and then wash it with warm water before heat treatment.
    3, stainless steel If there are debris on the surface, especially when organic matter or ash is attached to the workpiece, heating will of course have an effect on the scale.
    4. Differences in the atmosphere of the stainless steel furnace The atmosphere in the furnace is different in each part, and the formation of the scale will also change, which is also the reason for the unevenness after the pickling. Therefore, when heating, the atmosphere of each part in the furnace must be the same.
    5. It is necessary to dry and dry the workpiece with the touch of the workpiece. However, if it is placed at room temperature after drying, in the case of high humidity, moisture will still condense on the exterior of the workpiece. Therefore, it is best to dry before use.
    There is residual oxide scale before, and there is a portion where the scale remains and the portion without the scale after heating, which will show the difference in thickness and composition of the scale, which causes uneven appearance after pickling, so it is necessary to pay attention not only to the final heat treatment. Also pay attention to the central heat treatment and pickling.
    There is a difference in the scale that occurs. Therefore, it is necessary to make the processing member not touch the flame mouth when heating.

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