Precision casting casting deformation is divided into: trace from deformation, casting the flaring of deformation and warping deformation, yantai precision casting factory to introduce for everybody below three deformation modes of precision castings.Since the deformation:Alloys, gray cast iron is the most easy to trace the deformation.Grey cast iron shakeout after cleaning, there are residual stress is mainly residual thermal stress.In addition to make cold cracking formation of castings, the residual stress of the casting defects such as deformation, and trace the deformation of the main causes.Residual stress even if there is no more than the yield strength of material, but in the role of its, gray cast iron with a continuation of the time, will slowly micro plastic deformation occurs, this deformation is called trace from deformation.