Fatigue reliability guarantee of the interface toughening. Super surface modified material.

在本研究中，发明了一种界面韧性好、磨损系数低、膜厚大的超级类金刚石薄膜。同时，对建立能较好评价DLC膜疲劳可靠性的寿命加速试验方法进行了为期3年的示范性基础研究。本研究的目的是在高维度下，DLC膜与背衬之间的界面增韧与复杂的表面织构和疲劳可靠性的矛盾特性是相容的。一个知识的系统整理是在以下三个问题上进行的。(1)超级DLC膜发明工艺的构建：构建了实现DLC膜超低摩擦系数和超厚膜的优化处理工艺。(2)界面增韧、粘结强化结构的优化和处理工艺的系统化，最佳微观组织的控制和 ...更多信息 系统地实现了界面增韧和粘结增强的复合化工艺。(3)疲劳可靠性保障体系的构建：基于加速试验方法，通过系统整理超长寿命区产品安全保障知识，构建了包括超级DLC薄膜材料发明在内的一致性可靠性保障体系，本研究历时三年取得的成果如下。（1）对通过DLC导电涂层改善摩擦性能的Al-Si烧结合金进行疲劳可靠性评价。与未处理的材料相比，DLC涂层材料的疲劳强度得到了提高。这是因为DLC涂层的导电性提高了Si颗粒与背衬之间的界面强度。（2）研究了在高速工具钢SKH-51上进行混杂DLC涂层处理对疲劳强度的影响。在对工具钢进行表面改性处理时，不仅要充分注意表面功能的改善，而且要充分注意热历史残余应力的改善。少

In this research, the super DLC film which turns an interface toughly and has a very low wear coefficient and a very thick film was invented. And, the demonstrative basic research for 3 years was carried out on the construction of life accelerated test method which can appropriately evaluate fatigue reliability of a DLC film. The purpose of this study is that contradictory characteristics that is complicated surface texture and fatigue reliability with the interface toughening between DLC film and backing are compatible in the high dimension. The systematic arrangement of a knowledge was carried out on three problems of the following. (1) Construction of the super DLC film invention process ; Optimized treating process which realizes ultra low friction coefficient and super thick film of a DLC film is constructed. (2) Optimization of the interface toughening, the adhesive strengthening structure and the systematization of the treating process ; Control of the optimal micro structure an … More d a composite-ized process are systematized systematically to realize the interface toughening and the adhesive strengthening. (3) Construction of the fatigue reliability guarantee system ; Based on the accelerated test method, consistent reliability assurance system including the invention of the super DLC film material is constructed by systematically arranging a knowledge on product safety guarantee in the very long life region.The result obtained by this study for three years is as follows. (1)Fatigue reliability evaluation of the Al-Si sintered alloy which improved the frictional property by conducting DLC coating was carried out. The fatigue strength of DLC covering material was improved in comparison with unprocessed material. This is because that the interface strength between Si particle and backing is improved by conducting the DLC coating. (2)The effect of Hybrid DLC coat processing conducted to high speed tool steel SKH-51 on the fatigue strength was examined. It is necessary to pay the sufficient attention in not only improvement in the surface function but also heat history residual stress, when the surface reforming processing is conducted to the tool steel. Less