对流冷却的几千瓦的CO_2激光器的发展,明显地增大了应用激光束焊接较厚材料和进行高速度焊接的可能性。象电子束焊接一样,CO_2激光束能实现高纵-宽比和深穿透焊接,输入能量低,热畸变最小。与电子束焊接不同的是,不会产生X射线,而且焊接是在大气中进行的。焊接较厚材料的能力已由联合技术研究中心在加工几只12.7毫米(0.5时)厚的HY-130激光束焊件时演示过。这些焊件已运送至海军研究实验室,对焊接的显微结构和机械特性进行鉴定。本文报导的是从这些焊件获得的样品的张力性质。 The development of convectively cooled CO 2 lasers of several kilowatts significantly increases the possibilities of using laser beam to weld thicker materials and perform high speed welding. Like electron beam welding, CO_2 laser beams achieve high aspect ratio and deep penetration welds with low input energy and minimal thermal distortion. Unlike electron beam welding, X-rays are not generated, and welding is done in the atmosphere. The ability to weld thicker materials has been demonstrated by the Joint Technical Research Center at processing several 12.7 mm (0.5 in) thick HY-130 laser beam welds. These welds were shipped to the Naval Research Laboratory to identify the microstructure and mechanical properties of the weld. This article reports the tensile properties of samples obtained from these weldments.