Compared with other industries, the ship has no harsh environment of high temperature and high pressure and strong corrosion. However, the erosion of seawater, salt spray and water mist cannot be underestimated. This is the external environment that ships and diesel fasteners must withstand. There are several types of important fasteners that are known to the industry. Important bolts refer to the connecting bolts that bear the dynamic load of equipment such as marine diesel engines. Such as diesel engine cylinder head bolts, connecting rod bolts, main bearing bolts, connecting piston connecting bolts, through bolts and anchor bolts, and flange connection bolts in the shaft system. These bolts not only ensure the connection and fastening of the parts, but also bear the load of the machine during operation; therefore the quality of these bolts will directly affect the safe rotation of the diesel engine. The force of the bolt is complicated. In addition to the tensile force of the tensile force, it also bears the periodic effects of inertial force, impact force and vibration. In order to ensure safe and reliable operation of the machine, the bolts are required to have the following properties: 1. Sufficient strength, fatigue strength, and appropriate hardness; 2, good toughness, plasticity, and craftability; 3, high hardenability and lower notch sensitivity, at high temperatures should be resistant pad resistance, salt spray corrosion in seawater medium should have corrosion resistance. Commonly used materials for manufacturing important bolts are 40Cr, 35CrMoA, 40CrNi and 45 steel. The commonly used heat treatment method is quenching and tempering, so that it obtains better comprehensive mechanical properties. The important bolt materials for medium and high speed marine diesel engines are mostly 40Cr, 35CrMoA, 40CrNi, etc.; the important bolt materials for large-scale low-speed marine diesel engines are 40, 45, 40Cr and so on. Â DSPOF produce different kinds of Fiber optic lighting Kits,such as fiber optic car lighting kit, Fiber Optic Star Ceiling Kit,fiber optic swimming pool kit,and so on.If you wanna customized it, please do not heistate to contact with us Fiber Optic Car Lighting Kit,Fiber Optic Star Ceiling Kit,Fiber Optic Swimming Pool Kit,Fiber Optic Lighting Kits Jiangxi Daishing POF Co.,Ltd , https://www.jxopticfibrelight.com