Different Methods To Eliminate The Welding Residual Stress Levels Of Analysis

The manufacturing of large welded structure is the main business of our company.Welding method is the use of local heating,solid inevitable welding residual stress(that is,the internal stress)and deformation.Welding residual stress and deformation may cause process defects,if the development to a certain degree of influence is the carrying capacity of the welded structure,main performance in compression of strength,stiffness and stability,etc.;After extension of time,the release of internal stress can also affect the structure of the machining precision and dimension change and instability.Based on the structure of welding residual stress eliminating method as the background,through the blind hole method test component heat treatment after welding and vibration aging before and after the elimination of residual stress value,and comprehensive analysis to eliminate the residual stress level,through technical and economic evaluation,finally get the following conclusion:(1)heat treatment to eliminate the welding residual stress and vibration aging reliability are compared in technology,heat treatment to eliminate the welding residual stress than vibration aging effect is good.But,as compared with the standard JB/T10375-2002 requires eliminating rate 30%,two methods can achieve this standard,and far beyond the standard.So as to eliminate the welding stress in terms of vibration aging can be put into use;(2)heat treatment to eliminate the welding residual stress and vibration aging on the economic comparison of vibration aging has considerable advantages,compared with heat treatment,the saving rate is above 90%,the economy has the absolute advantage;(3)vibration aging aging compared with heat treatment to eliminate the welding residual stress,has the absolute advantage in the cycle,need only 20?50 minutes,and heat treatment requires a minimum of 5 hours,illustrate the efficiency of vibration aging accounts for absolute advantage;(4)vibration aging and heat treatment after welding,compared with absolute advantage saving on energy,vibration motor power less than 2 kw,save a lot of energy,green environmental protection;(5)vibration aging and heat treatment after welding,flexible use,easy handling,without being limited by the space,therefore,any site can handle,save space and cost,vibration aging can handle the heat treatment of giant component.