Heat treatment technology of stainless steel reducer

　　In the process of reducing or expanding deformation and pressing of stainless steel reducer pipe fittings, cold or hot pressing is determined according to different materials and diameter change of pipe fittings. Generally, cold pressure is used as much as possible, but for severe machining hardening caused by multiple changes in diameter, the thickness of wall is too thick or the material of alloy steel should be hot pressed. The expanding forming is made of tube blank smaller than the diameter of large end of stainless steel reducer, The expanding process mainly solves the situation that the stainless steel reducer with large diameter is not easy to form through reducing. Sometimes, according to the material and product forming needs, the method of expanding and reducing is combined

　　Because the stainless steel reducer parts are heated and pressed, the equipment tonnage required for material forming is reduced. The hot pressing tee has wide adaptability to materials, which can be used for low carbon steel, alloy steel and stainless steel materials; Especially for the tee with large diameter and thick pipe wall, this forming process is usually adopted. Besides using steel pipe as raw material to produce stainless steel reducer, the stainless steel reducer of department specifications can also be produced by stamping forming process. The drawing die shape is designed according to the inner surface dimension of the stainless steel reducer. The sheet metal after blanking is punched and stretched by stamping and drawing with a punch.