An New Process to Form Large-size Valve Bodies
Focused on the metal plastic forming of valve bodies used by power plant boiler,a new process named "Shear Extrusion" is described in this paper.By the methods of simulating and practical experiments,the new "Shear Extrusion" process has been studied,and the optimal process variables applied to forming valve bodies are obtained.Finally,it further testifies the feasibility and advantage of this process which the large size cut off valve bodies of 12CrMoV alloy have been successfully formed by the screw press.In addition,the new process can be applied to produce not only cut off valve bodies but also components with branches such as sluice valve bodies,teejunctions and so on.