1) laser welding
激光熔焊
1.
The over-limit and visual cracks occurred in an aero-engine high pressure turbine blade tip were repaired using laser welding.
采用激光熔焊法,排除了某型发动机高压涡轮工作叶片叶尖裂纹超标及开口型叶尖裂纹故障。
2.
Based on laser welding processes,this paper investigate the two typical laser welding technique applied in Passat of Shanghai Volkswagen: Laser welding between roof and side panel;Laser brazing in rear cover.
文章主要从工艺角度论述了上海大众帕萨特领驭这一车型中所应用的两种典型激光焊接技术-车顶与侧围外板的激光熔焊和后盖外板上下板的激光钎焊。
3.
Based on laser welding processes, this paper investigate the two typical laser welding technique applied in Passat of Shanghai Volkswagen: Laser welding between roof and side panel; Laser brazing in rear cover.
文章主要从工艺角度论述了上海大众帕萨特这一车型中所应用的两种典型激光焊接技术-车顶与侧围外板的激光熔焊和后盖外板上下板的激光钎焊。
2) laser welding-brazing
激光熔钎焊
1.
Characteristics of laser welding-brazing joint of Al/Ti dissimilar alloys;
铝/钛异种合金激光熔钎焊接头特性
2.
Interface characteristic and property of Ti/Al dissimilar alloys joint with laser welding-brazing;
铝/钛异种合金激光熔钎焊接头界面特性
3.
Welding characteristics of Al/Ti dissimilar alloys by laser welding-brazing with different spot;
光斑形式对Ti/Al异种合金激光熔钎焊特性的影响
3) laser deep penetration welding
激光深熔焊
1.
Calculation and detection of thermal cycle of laser deep penetration welding;
激光深熔焊接热循环的研究
2.
The occurrence cycle of eyehole in laser deep penetration welding is analyzed in theory, and the method of removing the effect of plaser during laser welding by adoption of squarewave pulse laser and assistant gas is put forward.
从理论上分析了激光深熔焊中小孔的存在周期 ,并提出利用方波脉冲激光和辅助气体共同作用来消除焊接过程中等离子体的影响。
3.
The technology of laser deep penetration welding (LDPW) for aluminum alloy has become a main reason which impedes the application of aluminum alloy in these fields.
对激光深熔焊接数值模拟中的解析解和数值解热源模型进行了总结,分析了它们各自的优点与局限性。
4) deep penetration laser welding
激光深熔焊
1.
In this paper,the plasma shape in deep penetration laser welding mild steel is observed using a high speed camera system,and the effect of the processing parameters such as laser beam defocus on plasma are experimentally investigated.
采用高速摄像方法 ,观测了低碳钢激光深熔焊过程中的等离子体形态 ;就激光焦点位置对等离子体的影响进行了实验研究。
2.
Several physical and technical factors that influence on the topography of weld in deep penetration laser welding were investigated theoretically and experimentally.
从理论和实验两方面研究了各种物理和工艺参数对激光深熔焊焊缝表面形状的影响， 并对改善表面质量的激光焊接工艺提出了建议。
5) deep penetration laser welding
深熔激光焊
1.
The characteristics and the effects on the weld pool shape in deep penetration laser welding are discussed.
分析了影响深熔激光焊熔池几何形态的主要因素；应用ＭＡＴＬＡＢ软件，实现了小孔和熔池形状的三维计算和模拟。
2.
The newly developed modeling methods of deep penetration laser welding are discussed in this paper.
介绍近年来深熔激光焊接过程数学模型的进展。
6) deep penetration laser welding
激光深熔焊接
1.
Numerical simulation of temperature field in deep penetration laser welding under hot and press condition;
热压条件下激光深熔焊接温度场的数值模拟
2.
Given special welding technology,theoretical P_c-v curve and P_c-Δf curve of stable deep penetration laser welding are deduced.
在同轴和侧吹保护气体的条件下,通过工艺参数优化,激光深熔焊接可以有效地避免高强度镀锌钢热影响区(HAZ)的软化现象以及焊缝气孔的有效控制。
3.
Under the assumption of cylindrical keyhole, the inverse Bremsstrahlung absorption in the keyhole in deep penetration laser welding of metals was studied by means of tracing a beam light.
在假设小孔为圆柱形的基础上,通过跟踪光线在小孔内的多次反射轨迹,对激光深熔焊接过程中小孔内等离子体的反韧致辐射吸收进行了研究,计算了小孔孔壁上吸收的激光功率密度,分析研究了孔壁的多次反射次数、聚焦透镜的焦距以及小孔直径等因素对孔壁上的激光功率密度分布的影响。
补充资料：半导体激光泵浦的激光晶体
半导体激光泵浦的激光晶体
LD pumped laser crystal
半导体激光泵浦的激光晶体LD PumPed lasercrystal适用于半导体二极管作泵浦源的激光晶体。传统的固体激光器一般用闪光灯泵浦，由于闪光灯的发光区域宽，只有一部分能量被吸收后转换成激光，大部分转换成热量，使工作物质温度上升，恶化了输出激光束的质量。半导体激光器输出的激光谱线窄(一般为几纳米)，选择合适的半导体激光器，使其激光光谱与某种固体激光材料的吸收光谱匹配，即可达到高效泵浦，大大减轻固体工作物质的热负荷。 因为半导体激光器光泵区域小，需用的晶体尺寸也小，因此要求基质晶体内可掺入的激活离子浓度要高，且不产生浓度碎灭。此外，要求与光泵的半导体激光波长相匹配的晶体的吸收带要宽，吸收系数要大;要有低的阑值功率;Q开关运转时，荧光寿命要长。当泵浦光源从闪光灯改变为半导体激光二极管时，对被泵浦的激光晶体产生了不同的要求。用闪光灯泵浦时，对材料的热性能和机械性能有严格要求，而半导体泵浦则更注重材料的光谱性能。 在已使用的激光晶体中，掺钱石榴石(Nd:YAG)晶体的阑值功率低，光学质量高，是应用于半导体激光光泵的固体激光器的主要材料。由于Nd3+离子在基质晶体中受分凝系数的限制，Nd3+离子浓度不能太高，所以一些氟化物和钨、钥酸盐晶体等掺杂浓度高，激光效率高，荧光寿命长，有可能成为半导体激光泵浦的后选晶体。 用半导体泵浦可制成效率高、功率和频率稳定、激光束质量好、寿命长的全固化激光器，并经各种频率转换技术，可发展成各种波长、各种模式、各种运转方式的激光器，这种激光器将在很大范围内取代已有的各类固体、液体和气体激光器。 (沈鸿元)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条