有向性加工層の残留応力に関する研究 : 微視的残留せん断応力の発生要因

概要

論文の詳細を見る
Factors generating microscopic residual shear stress ^τzxw in uni-directionally machined layers produced by cutting and grinding were studied experimentally. In the affected layers, residual strain distributions depend on machining direction and the strains are generated by ^τzxw. In affected layers, generally, macroscopic residual stresses are thought to consist of three elements resulting from thermal, burnishing or rubbing and mechanical cutting action of a cutting tooth and abrasive grains during machining process Relations between the three elements and ^τzxw were also investigated experimentally and the following can be summarized. ^τzxw is extinguished in process of recovery due to heating at low temperature in furnace ^τzxw produced by cutting and grinding increases as carbon content of steel increases, but has a tendency to be saturated in carbon segregated regions These results show that ^τzxw is a phase stress generated by elastic recovery force of cementite acting upon slip plane of ferrite grains. On the other hand, the travelling heat source at high temperature decreases ^τzxw and generates microscopic residual stress. ^τzxw generated in pearlite structure is greater than one in spheroidal cementite structure. The factors of generating ^τzxw are mechanical cutting and burnishing action, microstructures of steel and machining conditions.
公益社団法人精密工学会の論文
1984-03-05