共搜索到7870条信息，每页显示10条信息，共787页。用时：0小时0分0秒531毫秒
Fabrication and laser output of transparent Nd:YAG ceramics from microwave synthesized precursorsZHANG Xiaolin,LIU Duo,WANG Jiyang,YU Haohai,QIN Haiming,SANG Yuanhua,and LIU Hong State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China摘 要:We report the laser output of transparent Nd:YAG(Nd:Y3Al5O12) ceramics fabricated from Nd......
......
INVESTIGATION OF LASER BEAM WELDING PROCESS OF AZ61 MAGNESIUM-BASED ALLOY Z.J. Li1,H.Y. Wang1 (1.Industrial Center, Shenzhen Polytechnic, Shenzhen 518055, China) Abstract:Laser welding process of AZ61 magnesium alloys is investigated using a special CO2 laser experimental system. The effect of processing parameters including laser power, welding speed,and protection gas flow at the top......
Microstructure Evolution of Intermetallics Produced by Laser Powder Deposition ZHONG Min-lin1,HAN Jian-min2,LIU Wen-jin1,XU Xiang-yang2 (1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2.Institute of Materials Science and Engineering, Beijing Jiaotong University, Beijing 100044, China) 摘要:Heat treatment on the laser powder synthesized Ni20Al30Fe intermetallic......
Amorphization of Fe38Ni30Si16B14V2 surface layers by laser cladding ZHU Qing-jun(朱庆军), WANG Xin-hong(王新洪), QU Shi-yao(曲仕尧), ZOU Zeng-da(邹增大) School of Materials Science and Engineering, Shandong...; Abstract: Fe38Ni30Si16B14V2 amorphous composite coatings were fabricated by laser cladding on AISI 1045 steel in order......
and is heated to a high temperature rapidly by laser beam when the Al alloy surface is molten. Then the heat is transmitted to the surrounding region through heat conduction. This heating mechanism makes...Cavitation-erosion mechanism of laser cladded SiC particle reinforced metal matrix composite ZHANG Chun-hua(张春华)1, 2, 3, ZHANG Song(张 松)1, YANG Hong-gang(杨洪刚)1, ZHU Sheng-long(朱圣龙)2, MAN Hau......
LASER CLADDED TiCN COATINGS ON THE SURFACE OF TITANIUM C.S. Liu1,H.S. Kou2,D. Zhang2,Y.L. Yang2 (1.College of Material and Metallurgy, Northeastern University, Shenyang 110004, China;2.College of Science, Northeastern University, Shenyang 110004, China) Abstract:Laser cladded coatings of TiCN were produced on the surface of titanium. To obtain the optimal techniques, several conditions were......
by microhardness and tensile strength testing. The results show that the laser weld has non-equilibrium solidified microstructures consisting of FeCrNiC austenite solid solution, and little fine and dispersed...得穿透的焊接接头,焊接接头的强度约只有母材的88.5%,焊缝的断裂机制是塑性和脆性断裂的混合机制.由于在焊缝中存在一些Laves 颗粒,这促进了微裂纹和微孔的形成和扩展,降低了焊接接头的抗拉强度. 关键词:激光焊接；焊缝；组织；力学性能 中图分类号:TG 156；TN 249 文献标识码:A Laser welding......
Temperate distribution curves of different positions of Ti alloy substrate and Ta-W coating samples after laser pulse heating for different time 图2所示为钛合金基体和Ta-W涂层试样脉冲激光加热温度场不同时间后不同位置曲线.由图2(a)可知,钛合金表...(e)所示. 图3 钛合金基体和Ta-W涂层试样不同时间脉冲激光加热温度场有限元分析结果 Fig. 3 SYSWELD finite element analysis results of temperate field after laser pulse heating for different time of Ti alloy substrate and Ta-W......
Laser surface hardening of AISI H13 tool steel Jae-Ho LEE, Jeong-Hwan JANG, Byeong-Don JOO, Young-Myung SON, Young-Hoon MOON School of Mechanical Engineering, Pusan National University, Busan... of microstructures using a 200 W fiber laser as a heat generating source. The hardness of laser melted zone was investigated. In order to identify the effect of heat input on the laser melting zone......
