Determination principle of heating temperature of carbon steel elbow

　　The principle of determining the heating temperature of carbon steel elbow is that the material is above the austenitizing temperature, and the main compressive stress of the inner wall of the elbow is less than the yield limit of the material at this temperature. The higher the austenitizing temperature of the material, the higher the heating temperature; The higher the high temperature yield limit of the material, the higher the heating temperature. For medium frequency induction heating, the maximum temperature of WB36 steel is 850 ~ 900 ℃, that of A335P22 steel is 900 ~ 950 ℃, and that of A335P91 material is 900 ~ 1000 ℃. The temperature measurement method is the combination of fixed far-infrared thermometer and manual far-infrared thermometer. Temperature distribution is an important process parameter, which is directly controlled by the shape of the induction coil and the relative position between the induction coil and the core rod head. The shape of the induction coil is the main factor, and the relative position between the induction coil and the core rod head is the secondary factor. The radial distribution law of temperature along the core rod head is low, medium and high. When the heating temperature is high, the wall thickness of the stamping elbow increases.

　　Carbon steel elbow is used for the connection at the bend of the pipe. Connect two pipes with the same nominal diameter to make the pipeline turn at an angle. Divided by material, carbon steel elbow, cast steel elbow, alloy steel elbow, stainless steel elbow, copper elbow, aluminum alloy elbow, etc. Each carbon steel elbow has its own advantages and uses. Carbon steel elbow is a common connecting pipe fitting in pipeline installation, which is used for the connection at the bend of the pipeline. Carbon steel elbow can be favored by the market and continue to replace some traditional wear-resistant materials. The fundamental reason lies in its excellent product quality and the rapid development in the development and application of traditional wear-resistant materials. Because these steels have good wear resistance and toughness, simple production process, reasonable comprehensive economy and are applicable under many working conditions, they are welcomed by users.