Abstract
Drilling work on Inconel, a well-known super-heat-resistant alloy, requires a significant quantity of cutting oil to prevent heat-induced abrasion and damage to the cutting tool, caused by the strength and toughness of the alloy. This high requirement of cutting oil, however, negatively affects the processing environment; therefore, minimum-quantity lubrication (MQL), an eco-friendly cutting-oil-supply method, is attracting attention. The conventional MQL method, however, has the disadvantage that an oil-mist is produced along with high-pressure air; hence, the mist is scattered in the air, making the application of the oil to the cutting point inefficient and rendering the cooling effect to be less than that in wet processing. In this study, therefore, an eco-friendly compound, polyhedral oligomeric silsesquioxane (POSS)—a nanostructured organic–inorganic hybrid material that exhibits better adhesion to materials than conventional MQL-specific oil and is resistant to the heat generated during drilling—was developed by adding POSS to the conventional MQL-specific oil, and the effects were verified.
Highlights
The use of ultra-light, hardened, and difficult-to-cut materials such as Inconel and titanium alloys is rapidly increasing, especially in high-tech flagship industries such as aviation, space, and automobiles
In the minimum-quantity lubrication (MQL) method, because the oil mist is sprayed with high-pressure air and is scattered, it is impossible to efficiently supply the cutting oil to the cutting point
This study focused on developing an eco-friendly polyhedral oligomeric silsesquioxane (POSS)-containing MQL oil that is more resistant to the heat generated in drilling work, and exhibits a stronger adhesive force toward materials, compared with conventional
Summary
The use of ultra-light, hardened, and difficult-to-cut materials such as Inconel and titanium alloys is rapidly increasing, especially in high-tech flagship industries such as aviation, space, and automobiles. A representative super-heat-resistant alloy, has extremely desirable features, such as high strength, tenacity, high-temperature durability, and corrosion resistance [1,2,3]. These mechanical properties, reduce the machinability and cause problems such as economic loss due to the wear and breakage of tools, resulting from the heat generated during drilling work [4,5,6,7,8,9]. The fact that the oil is decomposed by the heat generated during drilling work renders this method less effective than conventional wet processing
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