shipyard use A131 DH32 hull steel plate, ZH70Q steel plate is a kind of high wear-resistant medium carbon chromium molybdenum gear bar steel, which is mainly used to manufacture the pile legs of offshore wind power installation platform. 70 in ZH70Q steel plate indicates that the yield strength of ZH70Q steel plate is 700MPa. Chemical composition of ZH70Q high wear resistant medium carbon chromium molybdenum gear bar steel: C: 0.08-0.14, Si: 0.5, Mn: 0.4-0.8, S: 0.02, Cr: 0.012-2.5, Mo: 0.9-1.1, Cu: 0.3, N: 0.012.
As a common steel plate in the steel market, shipyard use A131 DH32 hull steel plate, manganese steel plate has the following characteristics. First, good toughness, stretching and crimping can be done well. Second, the bearing strength of manganese steel plate is good and it can bear a lot of gravity. Third, the shipyard use A131 DH32 hull steel plate, manganese steel plate is easy to weld, easy to process finished products, and its price is relatively low. Fourth, manganese steel plate has good corrosion resistance, and long service life. Fifth, the manganese steel plate has good mechanical properties, low temperature performance, good plasticity and weldability.
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 shipyard use A131 DH32 hull steel plate plate should be derusted before cutting.
Leave a Message