What are the influencing factors of flame cutting quality for NM400 steel for vehicle

After the steel plate is produced from the original factory, it will pass through a series of transportation and storage links and then be delivered to the processing workshop. During this period of time, the steel plate surface will contact with the air continuously, which will inevitably produce a layer of oxide skin. The oxide skin is a difficulty in the treatment process. It has high melting point, is not easy to burn and dissolve, increases preheating time, reduces cutting speed. Therefore, the surface of the NM400 steel for vehicle plate should be derusted before cutting.

Last week (November 7~November 13), the price of imported iron ore increased overall. The price of external disks rose rapidly, and fell slightly towards the end of last week, and the spot price of the port increased. The price increase of iron ore is more driven by the price increase in the steel market. From the perspective of iron ore fundamentals, iron ore inventories in major ports continue to rise rapidly, steel mills are generally willing to purchase, and it is difficult for prices to continue to rise.

The company adheres to green development, supported by scientific and technological innovation and technological progress, vigorously advocates the NM400 steel for vehicle production and life style of saving, environmental protection, civilization and low carbon, adheres to the new industrialization road and the sustainable development road. Actively carry out international trade and maintain stable economic and trade relations with more than 80 countries and regions including the United States, Germany, France, the United Kingdom, Japan, South Korea and Australia.

The wear-resistant layer of NM400 steel for vehicle wear-resistant steel plate is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium and nickel are added. The carbide in the microstructure is distributed in the form of fiber, and the direction of the fiber is perpendicular to the surface. The microhardness of carbides can reach hv1700-2000 and HRC58-62 respectively. The alloy NM400 steel for vehicle carbide has strong stability at high temperature, high hardness and good oxidation resistance. It can be used normally within 500 ℃.