42CrMo4 material is an alloy structural steel with high strength, high hardenability, good toughness, small deformation during quenching, and high creep strength and endurance strength at high temperatures. 42CrMo4 steel is a modified AISI 4140 steel. The A131 FH40 ship construction steel product is mainly used in the manufacturing of seamless hydraulic cylinder or gas cylinder, heavy machinery, cranes, excavators and forklifts, etc.
Our company's A131 FH40 ship construction steel power boilers, heating furnaces of double bars, double high lines and medium and thick plates all adopt heat storage technology, which can fully use blast furnace gas; the ladle baking, Maerz active lime kiln and medium and thick plate heat treatment furnace all burn converter gas, which can improve the A131 FH40 ship construction steel utilization rate of secondary energy and realize negative energy steelmaking in steelmaking process.
Heat treatment process: heat treatment refers to a kind of process operation in which the metal or alloy can change the internal structure through certain heating, heat preservation and cooling methods in the solid range to obtain the required performance. A131 FH40 ship construction steel Heat treatment process refers to the ability to change the microstructure and properties of A131 FH40 ship construction steel after heat treatment, including hardenability, hardenability, temper brittleness, etc.
The effect of nitrogen (N) on the properties of A131 FH40 ship construction steel and so on steel is similar to that of carbon and phosphorus. With the increase of nitrogen content, the strength of steel can be significantly improved, especially the plasticity, especially toughness, and the weldability will be decreased, and the cold brittleness will be intensified. At the same time, aging tendency, cold brittleness and hot brittleness will be increased, which will damage the weldability and cold bending property of steel. Therefore, the nitrogen content in A131 FH40 ship construction steel and so on steel should be reduced and limited as much as possible. Generally, nitrogen content should not be higher than 0.018%.
Through the operation and management, brand advantage and improve pre-sales, sale of after-sales service, the efforts of the company into the industry leading enterprises.Relying on perfect quality management system, it has built up competition predominance and provided high quality, favorable price and perfect after service for customers.
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