Auto Washing Mechanism of Heat Treated Blanks

Heat treatment and surface modification techniques are utilized to optimize physical, chemical and mechanical properties of metals. Heat treatment involves use of heating and cooling to achieve desired result such as hardening, softening etc. After heat treatment black quenching oil deposits, thin layer of scale, discoloration were observed on surface that need to be removed. These heat treated parts needs to be cleaned thoroughly. After scale removal the part can be polished back to its original surface finish. Part cleaning is necessary to many industrial processes, as important to Surface finishing or to protect sensitive components. Cleaning is defined as the application of time, temperature, chemistry and energy to remove contamination from the surface of a part to a level appropriate for the intended application. In other words, cleaning is simply moving contaminants from where they are not wanted (on the parts) to where they should be (in the waste disposal system). The cleaning process is embedded into the production chain and needs to be carefully balanced for an optimum result with respect to overall process cost as well as environmental, safety and health aspects. This paper presents the concept of heat treatment and formation of scale after heat treatment, the various principals to remove that scale effectively and concentrates on formation of scale on different types of metals and ways to avoid it or remove it.