光电工程师社区 › 资料下载 › 光电理论及应用技术 › 激光技术与激光加工设备 › 超薄NiTiNb记忆合金激光焊焊缝成形及热影响区的组织和性能.pdf

资料分类导航

超薄NiTiNb记忆合金激光焊焊缝成形及热影响区的组织和性能.pdf

打开方式: Adobe Reader 9.0
资料大小: 1.99 MB
下载次数: 1
上传会员: 风轻扬
上传时间: 2015-07-09
本站网址: forum.oecr.com
查看资料所在的主题
下载资料

欢迎下载本站资料，下载前请先登录您的社区账号。

超薄NiTiNb记忆合金激光焊焊缝成形及热影响区的组织和性能:

超薄NiTiNb记忆合金激光焊焊缝成形及热影响区的组织和性能
Laser weld forming of ultrathin NiTiNb shape memory alloy and microstructure and properties of heat-affected zone
下载全文

作　　者：陆巍巍[1] 陈玉华[1,2] 黄永德[1] 付强[1] 封小松[3]
LU Wei-wei,CHEN Yu-hua,HUANG Yong-de,FU Qiang,FENG Xiao-song （1.School of Aviation Manufacturing Engineer, Nanchang Aviation University, Nanchang 330063, China; 2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; 3. Shanghai Spaceflight Manufacture （Group） Co., Ltd., Shanghai 200245, China）
机构地区：[1]南昌航空大学航空制造工程学院,南昌330063 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [3]上海航天设备制造总厂,上海200245
出　　处：《中国有色金属学报》 EI CSCD 2015年第25卷第1期 63-71页,共9页
The Chinese Journal of Nonferrous Metals
基　　金：上海航天科技创新基金资助项目（SAST201209）;江西省科技支撑计划项目（20133BBE50021）;江西省高等学校科技落地计划项目（KJLD14055）
摘　　要：采用Nd：YAG脉冲激光器实现了200μm厚热轧态NiTiNb形状记忆合金的激光焊接，研究激光平均功率、激光脉宽和激光频率等主要工艺参数对焊接接头形貌的影响，分析了焊缝热影响区显微组织、力学性能的变化规律。结果表明：激光平均功率、激光脉宽和激光频率需要良好匹配才能获得较好性能的焊接接头。当激光平均功率为16.8 W、激光脉宽为4.5 ms、激光频率为4.5 Hz时，焊缝的抗拉强度最高，达到母材的95%。随着激光平均功率、激光脉宽的增加，焊缝热影响区的宽度先增加后减小。激光频率增加后，热影响区晶粒变粗。当频率为27 Hz时，在靠近热影响区的焊缝出现了一个粗大树枝晶区域。母材断口的韧窝大而深，为典型的韧性断裂。焊缝断口的韧窝小而浅，呈鱼卵形。热影响区的显微硬度高于母材的，低于焊缝中心区域的。
Nd：YAG laser was used to weld hot-rolled-state NiTiNb shape memory alloy with thickness of 200 μm. The effects of main process parameters including average power of laser, pulse width of laser and frequency of laser to the morphology of the welding joint were studied, then the transformation law about the microstructure of heat-affected zone and mechanical properties of the welding joint were analyzed. The results indicate that a perfect welding joint needs a good match of average power, pulse width and frequency of laser. The highest tensile strength of welding joint reaches 95% of that of the base material obtained when average power of laser is 16.8 W, pulse width of laser is 4.5 ms and frequency of laser is 4.5 Hz. With increasing the average power and pulse width of laser, the width of heat-affected zone first increases, then decreases. The grains in the heat-affected zone continue to coarsen with increasing the frequency of laser. A gross dendrites area arises in the welding joint near the heat-affected zone when the frequency of laser is 27 Hz. The dimples in the parent material fracture is large and deep, which is classic ductile fracture. The dimples in the welding joint fracture are small and shallow, which look like roes. The micro-hardness of heat-affected zone is higher than that of the base material but lower than that of the centre area of welding joint.
关键词：NiTiNb形状记忆合金激光技术激光焊接工艺参数热影响区
NiTiNb shape memory alloy ; laser technique ; laser welding ; process parameters ; heat affected zone ;

|手机版|搜索|焦点光学|光电工程师社区 ( 鄂ICP备17021725号-1 鄂网安备42011102000821号 )

申明：本站为非盈利性公益个人网站，已关闭注册功能，本站所有内容均为网络收集整理，不代表本站立场。如您对某些内容有质疑或不快，请及时联系我们处理！

GMT+8, 2025-12-16 22:47


热搜: 防雾膜棒料红外反射膜光电二极管镀膜机反射膜光谱仪光电探头真空镀银滤光片光器件应用光学 zemax激光远心镜头 sio2 增透膜离子源栅网 zemax 论文高反膜半反半透膜

资料分类导航

热门下载

超薄NiTiNb记忆合金激光焊焊缝成形及热影响区的组织和性能.pdf