Heat Treatment Technology For Large-Caliber Carbon Steel Reducer

　　In the process of shrinkage or expansion deformation pressing of carbon steel reducer, cold pressing or hot pressing should be adopted according to the different material and diameter variation of the pipe fittings. Usually, cold pressing should be adopted as far as possible, but in the case of severe hardening caused by multiple diameter variation, hot pressing should be adopted for the case of thick wall or alloy steel material. For tube blanks Large-Caliber Seamless WP 321 Concentric Carbon Steel Reducer, the inner die is used to expand the diameter along the inner diameter of the tube blank. The expanding process mainly solves the problem that the larger end is not easy to shrink. Sometimes, according to the forming requirements of materials and products, the methods of expanding and shrinking are combined.

　　Large caliber carbon steel reducer have wide adaptability to materials and are suitable for materials of low carbon steel, alloy steel and stainless steel. Especially for large caliber carbon steel reducer with large diameter and thick pipe wall, this forming process is usually adopted. In addition to using steel pipe as raw material to produce large caliber carbon steel reducer.Large caliber carbon steel reducer can also be produced by sheet metal stamping process. The drawing die used for drawing is designed according to the size of the inner surface of the large caliber carbon steel reducer, and the blanked steel plate is stamped and stretched by the die.