1, precision casting softening annealing:The purpose is to decompose carbide, its hardness is reduced, and improve the processing performance, for nodular cast iron, its aim is to gain more ferrite.2, normalizing treatment:Precision casting main purpose is to obtain the pearlite and sorbite structure to improve the mechanical properties of the stainless steel casting.3, precision casting quenching:Mainly in order to obtain a higher hardness and abrasion strength, at the same time to the surface of the high wear-resisting properties.4, precision casting surface hardening treatment:Mainly in order to obtain the surface hardening layer, and at the same time get very high surface wear-resisting properties.5, precision casting precipitation hardening treatment:Mainly in order to obtain high strength and elongation is not so violent change.