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GH3039脉冲激光焊接头组织性能研究刘丰刚,成军,潘海莎,郑刚亮西安理工大学材料科学与工程学院摘 要:采用脉冲激光焊接工艺对GH3039镍基高温合金进行实验研究.焊接工艺参数选择适当时,可以获得较好的焊接接头.试验接头参数为:工作电流240 A,脉宽6 ms,频率14 Hz,焊接速度105 mm/min,离焦量3 mm,气流量3 L/min.通过硬度测定,金相观察,拉伸试验对焊缝组织和形貌进行观察和分析.结果表明,焊缝组织主要为奥氏体基体,中心区域为细小的等轴晶,边缘为柱状晶,焊缝中心的硬度高于母材硬度,焊缝组织中的层状形貌是由脉冲激光间断作用形成.关键词:镍基高温合金;激光焊;焊接接头;显微组织;......
ADVANCED NICKEL-BASED AND NICKEL-IRON-BASED SUPERALLOYS FOR CIVIL ENGINEERING APPLICATIONS U. Brill1 (1.ThyssenKrupp VDM GmbH, 58791 Werdohl, Germany) Abstract:The use of high-temperature materials is especially important in power station construction,heating systems engineering, furnace industry, chemical and petrochemical industry, waste incineration plants, coal gasification plants......
The Behavior of Inclusions during the Special Melting Processes of Superalloys傅杰,赵俊华,徐高阳,王慧摘 要:<正> The behavior of nitride inclusions during the VIM, VAR and ESR processes of superalloys has been investigated. The experimental results have proved that the inclusions in the original metals, even if the pure TiN power added rapidly decompose......
Variation in Creep Rupture of γ′ Strengthened Superalloys with Stacking Fault Energy of Matrices阳志安,师昌绪,肖耀天摘 要:<正> The correlation between the creep rupturebehaviour and the stacking fault energy of matricesof γ′strengthened superalloys has been studied dur-ing constant load creep.At high temperature andintermediate stress,the creep rupture time......
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Microstructural Feature and Evolution of Rapidly Solidified Ni3Al-Based SuperalloysYe-Fan Li1,Chong Li1,Jing Wu1,Hui-Jun Li1,Yong-Chang Liu1,Hai-Peng Wang21. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University2. Department of ......
Influences of Re on low-cycle fatigue behaviors of single crystal superalloys at intermediate temperatureLiu Liu1,2,Jie Meng1,Jinlai Liu1,Mingke Zou1,Haifeng Zhang3,Xudong Sun2,Yizhou Zhou11. Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences2. Key Laboratory for Anisotropy and Texture of Materials, Northeastern University3. Shenyang National Laboratory for Materials......
γ/γ′ interface strengthening of Re in single crystal superalloys LUO Yu-shi(骆宇时), LI Jia-rong(李嘉荣), LIU Shi-zhong(刘世忠), HAN Mei(韩 梅), CAO Chun-xiao(曹春晓) National Key Laboratory of Advanced High... with various Re contents, the effects of Re on the interfacial structure characteristic and interfacial dislocations of γ/γ′ in single crystal superalloys were investigated. A high resolution transition......
Fabrication of directional solidification components of nickel-base superalloys by laser metal formingLiping Feng, Weidong Huang, Darong Chen, Xin Lin, and Haiou Yang State Key Laboratory...="ChDivSummary"><正> Straight plates, hollow columns, ear-like blade tips, twist plates with directional solidification microstructure made of Rene 95 superalloys were successfully fabricated on Nickel-base......
Effects of Re on surface eutectic formation for Ni-base single crystal superalloys during directional solidificationLiang Cao,Yizhou Zhou,Tao Jin,Xiaofeng SunInstitute of Metal Research, Chinese Academy of Sciences摘 要:Effects of Re on the formation of surface eutectics have been investigated by using Ni-base single crystal superalloys with different Re......