Basic knowledge of hot pressed pipe fitting elbow

　　Hot pressed pipe fitting elbow are widely used in areas where pipeline needs change direction, and are primarily used in fields such as chemical, civil, construction, and industrial production.

　　Hot pressed pipe fitting elbow is a type of pipe fitting. Hot pressed pipe fitting elbow is a type of elbow manufactured using the hot pressing process. A hot pressed pipe fitting elbow is a bend made by heating a pipe and using professional equipment to process it into shape. It is then cut and heated to a critical temperature above the critical temperature. After holding it for a period of time, it is quickly placed in a quenchant, causing its temperature to suddenly decrease and rapidly cooling at a rate greater than the critical cooling rate.

　　The treatment method of quenching is to heat the elbow above the critical temperature, keep it warm for a period of time, and then quickly put it into the quenching agent to suddenly reduce its temperature, rapidly cool it at a speed greater than the critical cooling rate, and obtain an unbalanced heat treatment method mainly composed of martensite. Quenching can increase the strength and hardness of steel, but it needs to reduce its plasticity. The commonly used quenching agents in quenching include water, oil, alkaline water, and salt solutions.