MIM stainless steel plate adheres to the surface must be completely skimmed when it is subjected to cold oil. Then it is washed with warm water degreasing agent trichloroethylene, caustic soda solution, then heat treated. If there are stainless steel debris on the surface, especially when an organism gray on the workpiece is attached, there will be an impact scale for heating.

The atmosphere of different MIM stainless steel furnace atmosphere is different each other, the scale will change. This is caused by uneven acid pickling. Therefore, when heated, the atmosphere in all parts of the furnace must be the same. To achieve this, we must also consider the atmosphere of the cycle.    

If MIM stainless steel has residual oxides before the heat treatment process, after the oxide is heated, there will be no dirt on the remaining parts. The scale composition of the scales on the oxide scale are different, the surface will cause uniform acid. Therefore, only should we pay attention to the final heat treatment, but also fully note the intermediate annealing pickling.

In addition, by heating the workpiece, Longmen brick, asbestos, etc., if there is water, the water will evaporate when heated, the parts directly contacting with other parts of the steam atmosphere will be different. Of course, the formation of scale is different. Therefore, the direct contact between the object the workpiece must be completely dry before use. However, after being dried at room temperature under high humidity, the water still coagulating on the surface of the workpiece. Therefore, it is best to dry before use.