What matters should be paid attention to in the heat treatment of NM400 steel plate

NM400 steel plate is a steel that many manufacturing industries will choose. It has good wear resistance, so it can be used in many places. When using this kind of raw material, it is impossible to use it immediately, and a certain amount of heat treatment is required to better improve the quality of the product.

Before the heat treatment, you need to pay attention to the oil droplets sprayed out when the fuel oil burner is ignited. Once it splashes on the steel, it is easy to cause nitriding in the later stage, and it is also more harmful to the steel. In addition, it is required to uniformly generate oxidation reaction during heat treatment, and uniform scale appears. If it fails to do so, it will affect the subsequent pickling passivation effect, resulting in different levels of corrosion, and the final surface layer will also appear concave and convex.

When the NM400 steel plate is heated, another reason for the uneven scale is fingerprint adhesion. This reason is the easiest to ignore. If you don't wear gloves or touch the steel when you wear it, it is easy to leave grease, organic compounds and dust on the surface, which will affect the later heat treatment process.