Kineticofmechanismofclampingsandsformedonthesurfaceofwet-sandcastingDONGGuangming夹砂是铸件常见的表面缺陷，多产生于湿砂型铸造时铸件较大的上表面。夹砂是由于浇注高温液态金属时，砂型表面层受辐射传热，体积膨胀产生热压应力；同时，由于水分迁移形成强度很低的饱和 Kineticofmechanismofclampingsandsformedonthesurfaceofwet-sandcastingDONGGuangming Sand is a common surface defects castings, mostly produced in the wet sand casting castings on the larger surface. Sanding is due to the pouring of liquid metal at high temperature, the sand surface layer by radiation heat transfer, volume expansion of hot compressive stress; the same time, due to the formation of low moisture saturation migration