共查询到19条相似文献,搜索用时 203 毫秒
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采用大功率光纤激光器进行不同板厚的不锈钢的切割试验,研究了光束入射角对切割质量的影响。结果表明,在切割枪不同的倾斜姿态、不同板厚下,光束入射角对切割质量的影响也不同。 相似文献
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NEC最近研制出 10kW级YAG激光器 ,在固体激光器领域是目前世界上输出功率最大的激光器。该激光器是本公司CW激励高输出YAG激光器“M70 7A系列”的最高档机 ,利用MOPA控制方式 (用放大器将主振荡器激光功率进行增幅的方式 ) ,依靠连续振荡即获得 10kW级的输出功率。MOPA方式由 7组振荡器和增幅器构成 ,振荡器由高效率聚光器组成 ,聚光器激光结晶采用高可靠性的YAG结晶方式、并具有热透镜补偿效果 ,1个聚光器即可实现 850W聚光。该激光器既达到了高输出又实现了± 3%以内的稳定输出 ,而且采用 2 .5倍输出可调的… 相似文献
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采用大功率CO2激光器高速切割板材,是板材加工的一门新兴先进技术。大功率激光器的高质量光束模式是保证切割能力和切割质量的关键。文章在分析激光器光传导系统结构的基础上,探讨了导光系统的设计。先进的导光系统对于大功率激光切割机的研发具有重要意义。 相似文献
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以CO2激光为热源,镀锌钢板为母材,CuSi3焊丝为钎料,进行了双光束激光自动填丝钎焊工艺试验.通过对比单、双光束钎焊特点及改变双光束钎焊工艺参数,分析了双光束激光功率、离焦方式、双束激光能量配比、焦点间距等对接头质量的影响.结果表明,双光束钎焊对激光功率的变化具有更大的适应性;当采用负离焦并行双光束、2 mm 焦点距离的串行双光束且前束激光功率大于后束激光时,可以获得更好的钎缝质量,钎焊过程更具灵活性、适应性.在此基础上,借助金相显微镜、SEM和EDX能谱分析,对接头组织及界面元素分布规律进行了分析.结果表明,双光束钎缝附近母材晶粒更细小,粗晶区更窄;在界面处有Fe-Si金属间化合物生成. 相似文献
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针对激光深熔焊过程中易出现的气孔问题,作者提出光束摆动激光焊接减小气孔倾向的工艺。利用3kW快轴流CO2激光器分别对激光焊接过程中可能出现的氮气孔和氩气孔进行了试验研究。结果表明,光束摆动激光焊接对氮气孔有显著的消除效果,随着摆动频率的增加,气孔急剧减少,并且在摆动幅度仅为0.5mm的情况下,就可以起到消除气孔的效果;光束摆动激光焊接对于抑制氩气孔也有一定作用,摆动频率越大,摆动幅度越大,对熔池的搅拌越大,越有利于气泡的逸出,焊缝中氩气孔越少。 相似文献
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XU Huibin TAN Shusong Technische Universitat Berlin FRG XU Huibin Dipl.-Ing FB Physikalische Ingenieurwissenschaft HF TU Berlin Berlin FRG 《金属学报(英文版)》1990,3(11):360-363
The radiation of material surface by high intensity laser beams is used to produce the uhrafinepowder of pure Fe and ZrO_2.The morphology,size and phases of the powder were examinedby X-ray diffraetometer,scanning electron microscopy as well as transmission electronmicroscopy.In pure Fe a considerable quantity of γ-phase was found in the powder.InZrO_2 powder,instead of stable phase,two metastable phases appeared. 相似文献
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A suitable model has been developed to predict the effects of CO2 laser irradiation on magnesia partially stabilised zirconia. The paper presents an analytical model to simulate the transverse electromagnetic mode (TEM01) CO2 laser beam of using two paralleled laser beams and investigate the melt pool depth geometry in the MgO–PSZ following CO2 laser irradiation. The predicted melt pool depth and the experimental values were in relatively good agreement over a certain range of laser energy densities. The deviation between the calculated results and measured results was attributed to the difference between the real effects of TEM01 beam mode and two simulated paralleled beams, the neglecting of sideways conduction energy and the significant difference between the meltpool diameter and laser beam diameter. 相似文献
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Yosuke Yamazaki Yohei Abe Yukio Hioki Mitsuyoshi Nakatani Akikazu Kitagawa Kazuhiro Nakata 《Welding International》2016,30(9):699-707
Laser welding with oscillation laser beams enables control of the heat input distribution. In this study, we attempted to develop a narrow-gap welding process with oscillation laser welding. This process is expected to prevent a lack of fusion because the entire bottom to the groove can be melted by the oscillation laser. As the first step of the study, bead-on-plate welding experiments with an oscillation laser beam were performed to investigate the relationship between the welding conditions and welding results. The experiments revealed that the oscillation conditions strongly affect the welding penetration shape. It was clarified that the wire melting phenomena in oscillation laser welding differed from those of straight (non-oscillation) laser welding. Additionally, narrow-gap laser welding experiments were performed to investigate the relationship between the oscillation conditions and gap width. The results confirmed the effectiveness of oscillation laser welding for narrow-gap welding. 相似文献
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Thick laser coatings: A review 总被引:1,自引:0,他引:1
L. Pawlowski 《Journal of Thermal Spray Technology》1999,8(2):279-295
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工业纯钛TA2激光气体氮化表面硬度的研究 总被引:1,自引:0,他引:1
激光气体氮化可以有效地提高钛合金表面硬度,从而改善钛合金耐磨损性能。通过金相组织观察和硬度测试分析了钛合金激光气体氮化时.激光气体氮化参量和激光光束分布对钛合金氮化后表面硬度的影响。结果表明,氮化区域内生成硬质相TiN是TA2钛合金表面硬度得到提高的主要原因,有利于硬质相TiN形成的激光气体氮化参量都会提高钛合金表面的硬度。而采用带式积分镜进行激光光束变换可以有效提高激光氮化处理的效率,钛合金平均表面硬度是原来的1.3倍。 相似文献