The effect on fatigue life of residual stress and surface hardness resulting from different cutting conditions of 0.45%C steel
The effect on fatigue life of residual stress and surface hardness resulting from different cutting conditions of 0.45%C steel
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DOI：
10.1016/j.ijmachtools.2004.08.002
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发表时间：
2005-02-01
影响因子：
14
通讯作者：
Sasahara, H
中科院分区：
文献类型：
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作者：
Sasahara, H
受影响层是通过切削过程在机加工表面层内生成的。精加工时刀具的刀尖半径、进给速度和切削刃形状等切削条件会影响残余应力、表面硬度和表面粗糙度。本文表明，这种加工表面性能可以在一定程度上通过切削条件的设置来控制。然后，通过使用在各种切削条件下精加工的样品进行疲劳试验，研究了加工条件对疲劳寿命的影响。结果表明，仅通过设置适当的切削条件，机加工零件的疲劳寿命就可能比原始材料或没有受影响层的精心加工的材料更长。当产生的残余应力较小并且诱导的表面硬度较高时，就会实现这种情况。通过采用低进给率、小拐角半径和倒角刀具等切削条件，可以使加工零件获得更长的疲劳寿命。 (C) 2004 Elsevier Ltd. 保留所有权利。
The affected layer is generated within the machined surface layer through the cutting process. Cutting conditions such as the nose radius of the tool, feed rate and shape of cutting edge at the finishing operation affect the residual stress, surface hardness, and surface roughness. In this paper, it is shown that such machined surface property could be controlled by the setting of the cutting conditions to some extent. Then the effect of the machining conditions on the fatigue life was investigated through a fatigue test using the specimen finished under various cutting conditions. It was shown that it is possible to get longer fatigue life for machined parts than the virgin material or the carefully finished material without affected layer, only by setting the proper cutting conditions. Such a situation was realized when the generated residual stress was small and the induced surface hardness was high. A longer fatigue life for the machined components can be obtained by applying such cutting conditions as a low feed rate, a small corner radius and a chamfered cutting edge tool. (C) 2004 Elsevier Ltd. All rights reserved.