超硬合金の低サイクル疲労寿命に及ぼす組織パラメータの影響

概要

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In order to obtain the knowledge on how the tool life of cemented carbide in view of brittle fracture and its scatter are determined, and thereby to propose a method of the quality control in that sense, the correlation between the fatigue life in the cyclic impact test and the structural parameters has been investigated. Sintered tungsten carbide (K10) of four different manufactures on the market have been subjected to the cyclic impact test, and each manufacture has shown up to a distinctive pattern or value of fracture life. The contribution ratios of conceivable structural parameters, which are likely to govern the fracture life predominantly, have been statistically analyzed by means of progressive discrimination. The analysis has revealed that the pore parameter primarily governs the fracture life and its scatter, whereas the grain parameter of WC slightly does. As far as low cyclic fatigue type of brittle fracture is concerned, the quality control or the assessment of tool toughness will be possible merely through the structural parameters observed.
社団法人精密工学会の論文
1984-07-05