Due to mechanical polishing is main or by artificial complete, so polishing technology is still influence the main cause of polishing quality. In addition, still with mould material, before polishing surface condition of and heat treatment process and so on. High quality steel is a good polishing quality condition, if uneven surface hardness steel or characteristics are different and often can produce polishing difficult. Steel in various inclusion and porosity are not good for polishing.
Different hardness on the influence of polishing technology increased the difficulty of hardness to grinding increase, but after polishing the roughness of the decrease. Because of the higher hardness, and to achieve the roughness of the lower the polishing time corresponding growth. At the same time higher hardness, polishing the possibility of excessive less.
The surface polishing the effect of process condition for steel products in machining broken cutting process, because of quantity of heat, due to the surface or other factors to damage, cutting parameter improper influence will polish. Electrical discharge machining the surface after than ordinary mechanical processing or after heat treatment of grinding surface more difficult, so before the end of edm should use pure rules must edm nap, otherwise will form the surface hardening thin layer. If edm refinement rules must choose improper, heat affected layer depth of 0.4 mm maximum. Hardening the hardness of thin layer than matrix high hardness, must be removed. So it is best to increase a coarse grinding, thoroughly remove damaged surface layer, constitute a average rough metal surface, for polishing processing provides a good foundation.
Chemical polishing according to requirements in polishing not high degree of occasions, need to heat and use it now at present technology, it can be used if three kinds of polishing is not the chemical polishing way, because the chemical polishing effect is poor, the comprehensive cost is higher.
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