Analysis of the Structure of the Surface Layer of Spheroidal Cast Iron GJS Casts

Formation of appropriate properties of final product surface layer in time of manufacturing processes decide about its useful application. Exploitational product surface formed in range of transitory zone of surface layer is characterized by specified exploitational properties. Incorrect selection i.e. technological surpluses leads to decreasing of technological properties and to decrease of exploitational properties of final products surface layer. Practical using of surface layer properties by using parameters of already used technological process is one of possibilities for increasing of durability and reliability machine parts. By example of spheroidal cast iron cast GJS, the form and range of surface layer was demonstrated. This allow to determine the minimal technological surpluses and in this way to define the most advantageous properties for already used technology.