天津市北辰区中关村可信产业园B9-1 Address: B9-1, Trustworthy Industrial Park, Zhongguancun, Beichen District, Tianjin
15522233345 Mobile: 15522233345
许宗涛 Contact: Xu Zongtao
Alloy steel pipe 3
With the improvement of the superheating temperature of molten iron in the smelting of 12cr1mov seamless steel pipe and the extension of the holding time of molten iron at high temperature, the graphitization of cast iron weakens, pearlite increases, and the graphite and matrix structure are refined. Participating in the inoculant in the molten iron can turn it into a white mouth. Or the cast iron of Makou becomes gray, and the nodularizing agent can make the flake graphite become floc or spherical. That is to say, with the same chemical composition and 12cr1mov seamless steel pipe cooled in the same mold, different cast iron structures can be obtained due to different treatment methods of molten iron melting.
According to 12cr1mov seamless steel pipes, different cast iron structures are requested. Request high-strength castings: graphite is preferred to be spherical or floc, and matrix is to be pearlite; request tough castings: in addition to wishing to have spherical or floc graphite, ferrite is better; request resistance Grinding castings: In addition to the desire to have a fine pearlite outer body and a low-alloy seamless tube eutectic structure, it is more advantageous; request a machine base with good vibration absorption: It is better to have coarse flake graphite; request to improve 12cr1mov seamless steel pipe Machining performance: The larger the amount of graphite, the better; the cast iron artwork should be high in phosphorus and phosphorous eutectic.