【摘要】 本文探讨用激光处理45钢缺口圆柱试样,以提高疲劳强度和寿命。通过对比实验,得到处理后试样的疲劳寿命是未处理的4.3—9.1倍;45钢的疲劳极限分别提高55％和74％。给出了疲劳寿命倍增值 n 与应力水平 s 的关系式。对激光处理试样作了微观分析。更多还原

【Abstract】 The problem that the cylinder slotted samples have been treated by CO₂ laser beamto improve fatigue properties is investigated in this paper.The fatigue life of the samples treatedis 4.3—9.1 times as long as those untreated.The fatigue limit of 45 steel has increased by a fac-tor of 55 and 74%.The microstructure of treated samples has been investigated.更多还原