What issues should be paid attention to when processing stainless steel plates?

　　What problems should be paid attention to when processing stainless steel plates? If oil is attached to the surface of the workpiece when the stainless steel plate is heated, the thickness and composition of the oxide scale at the oil attachment part will be different from that of other parts, and carburization will occur. The carburized part of the base metal under the oxide skin will be severely attacked by acid. The oil droplets sprayed out by the heavy oil burner during the initial combustion will also have a great impact if they are attached to the workpiece. It will also have an impact when the operator's fingerprints adhere to the workpiece. Therefore, bath workers should not directly touch the stainless steel parts with their hands, and do not allow the workpiece to be stained with new oil. Clean gloves must be worn.

　　If there is lubricating oil attached to the surface of the workpiece during cold processing, it must be fully degreased in trichlorethylene degreasing agent and caustic soda solution, then cleaned with warm water, and then heat treated.

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

　　Differences in the atmosphere in the 304 stainless steel plate furnace The atmosphere in the furnace is different in each part, and the formation of oxide skin will also change, which is also the reason for the unevenness after pickling. Therefore, when heating, the atmosphere in each part of the furnace must be the same. To this end, the circulation of the atmosphere must also be considered.

　　In addition, if the bricks, asbestos, etc. that make up the platform used to heat the workpiece contain water, the water will evaporate when heated, and the atmosphere of the part directly in contact with water vapor will be different from that of other parts. just different. Therefore, objects that are in direct contact with the heated workpiece must be fully dried before use. However, if it is placed at room temperature after drying, moisture will still condense on the surface of the workpiece under high humidity conditions. So, it's best to dry it before use.

　　If the part of the stainless steel plate to be treated has residual scale before heat treatment, there will be differences in the thickness and composition of the scale between the part with residual scale and the part without scale after heating, resulting in uneven surface after pickling , so not only should we pay attention to the final heat treatment, but we should also pay full attention to the intermediate heat treatment and pickling.

　　What problems should be paid attention to when processing stainless steel plates? There is a difference in the oxide scale produced between the stainless steel surface that is directly in contact with the gas or oil flame and the place that is not in contact. Therefore, it is necessary to keep the treatment piece from directly contacting the flame mouth during heating.