【摘 要】
：
Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool.The results of increasing the adh
【机 构】
：
School of Mechanical and Vehicle Engineering,Langfang Sandvik Ltd.
【基金项目】
：
国家自然科学基金;国家自然科学基金
论文部分内容阅读
Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool.The results of increasing the adhesion strength of thin film coatings on cutting tool inserts by pretreating the inserts with sandblasting technique to obtain a desirable surface morphology of the inserts are presented.A geometric model representing the ideal surface morphology is established to enhance the nucleation density and adhesion strength of coating-substrate.Thin film coating experiment is conducted on the substrates of four different sample groups.Indentation and wear tests are performed on coated inserts to evaluate the effect of sandblasting on the adhesion strength of the coatings.A theoretical analysis is provided on the formation and growth of atom clusters in terms of the contact angle and the thermodynamic barrier of a substrate to predict thin film nucleation.
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