Abstract Hard nano coatings is used to enhance the tools longevity , especially for cutting tool and pieces denices, and also to achieve the swtable garniture property and the durability to corrosion resistance in atomosphere , body liquid and some of industnal fluids. TiN and CrN are to purpose the hard nano coatings on the tools and molds , for thermore , the higt hardness and wear resistance, during the maehining with high speed and in suitable condition have a limitation. As regareds TiN and CrN coating are leads to high toughness and decrease the slough the coat and to participation TiCrN multi layer nano coating to improve the oxidation and corrosion and also have high hardness, wear be haviar than CrN nano coating, this attends the TiCrN multi layer nano coatings should have be a good performance than nitrids. In this stuty by making the target of cold work tools D5 on TiCrN , CrN , TiN nano coatings with physical vapor deposition. After that wear , corrosion and hardness be havors of three nano coating are compore with together. To study the microstructure of physical vapor deposition , thickness of coats also to stadying the elemented analysis , the scanning electron microscope is used X-Ray diffraction is used to phase analysis of coatings. To estimate the properties of coatings samples with hardness eva‎luate , pin on disk weare test and corrosion test with 3.5% wt NaCl 3% KCl. The results of pin on disk wear test on the coating sample with the force 100 , 120 and 1000 m that results shows that TiN nano coat TiCrN multi layer and CrN have high wear resistance respectively. Stady of surfaces and wear particles of different sample , shows different wear mechanism. The resalts of corrosion tests on different samples , the good performance of TiCrN malti layer nano coating , thin film CrN and at the end TiN have a high corrosion resistance respectively. The results of hardness test shows that TiN thin film , TiCrN mnlti layer and at the end CrN have a high hardnesses respectivdy.

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