Abstract
This study aimed at improving the cutting performance of a ceramic tool to which were added solid lubricant particles. We prepared the self-lubricating ceramic tool by adding CaF2@Al2O3 instead of CaF2, and the self-lubricating ceramic tool with Al2O3 as matrix phase, Ti(C,N) as reinforcement phase. The properties of the ceramic tool with different contents of CaF2@Al2O3 and CaF2 were studied by turning 40Cr. Compared with the ceramic tool with 10 vol.% CaF2, the main cutting force and the cutting temperature of the ceramic tool with 10 vol.% CaF2@Al2O3 decreased by 67.25% and 38.14% respectively. The wear resistance and machining surface quality of the ceramic tool with CaF2@Al2O3 were better than the ceramic tool to which were directly added CaF2. The optimal content of CaF2@Al2O3 particles was determined to be 10 vol.%. The addition of CaF2@Al2O3 particles effectively reduces the adverse effect of direct addition of CaF2 particles on the ceramic tool, and plays a role in improving the cutting performance of the ceramic tool.
Highlights
With the continuous development of hardened steel in dies, bearings, molds and other industrial fields, researchers have begun to pay attention to the machining of hardened steel
Dosbaeva et al [1] compared the performance of WC tools with CVD coating and PCBN tools when turning D2 tool steel
The results show that the ceramic tool with CaF2 @Al2 O3 has better cutting performance than the ceramic tool with CaF2
Summary
With the continuous development of hardened steel in dies, bearings, molds and other industrial fields, researchers have begun to pay attention to the machining of hardened steel. Dosbaeva et al [1] compared the performance of WC (tungsten carbide) tools with CVD (chemical vapor deposition) coating and PCBN (polycrystalline cubic boron nitride) tools when turning D2 tool steel. Khaider Bouacha et al [2] used a CBN (cubic boron nitride) tool to carry out cutting test on AISI (American Iron and Steel Institute) 52,100 bearing steel, and studied the influence of tool wear and cutting parameters on surface roughness. Rachid et al [3] conducted cutting tests on PM (powder metallurgy) high-speed steel and studied the cutting parameters and conditions suitable for PM high-speed steel. Al2 O3 -based ceramic tools had high hardness and good wear resistance, and they were often used to machining hardened steel materials.
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