Cangzhou Bohai Pipe Co., Ltd. specializing in forging a flange 20 #, free forging basic steps: the free forging, forging shape is deformed by some of the basic steps of the blank gradually forged. The basic steps are free forging upsetting, stretching, punching, bending and cutting and so on. 1. upsetting upsetting is the original blank axially forged 20 # flange, so that its height reduced cross-section increases during operation. This process commonly used in forging gear blanks and other disc-shaped forgings. All upsetting upsetting divided into partial upsetting two. 2. Stretching Stretching is to increase the length of the blank, forging cross section reduction step is usually used to produce shaft in blank, such as lathe spindles, connecting rods. 3. perforating punch in the blank out of the through-hole or blind hole of the forging process. The bending the blank bent into a certain angle or shape forging process. 5. reverse a portion of the blank relative to the other portion of the rotating angled forging process. 6. The cutting or removal of the blank forging steps split feed head. Cangzhou Bohai Pipe Fittings Co., Ltd. 20 # forging flange flange cast out, accurate blank shapes and sizes, small processing capacity, low cost, but there are casting defects (pores cracks inclusions.); Castings streamline the internal organization of the poor (if it is cutting elements, streamlined worse); forging flange generally lower than the casting flange carbonaceous rust, forging streamline good, the organization is relatively compact, mechanical properties than cast flange; forging process incorrectly or not there will be a large grain Sales were 20 # flange, hardened crack phenomenon, forging costs than cast flange. Casting forging ratio can withstand higher shear and tensile strength. Casting advantage is that you can come up with a more complex shape 20 # flange offer, the cost is relatively low; forging advantage is that even within the organization, there is no casting porosity, inclusions and other harmful defects; sales 20 # flange _ Cangzhou Bohai (already certification) _20 # flange provided by Pipe Co., Ltd. Cangzhou Bohai. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is an industry leader in Cangzhou, Hebei, three, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.