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| 1 | COMPUTERIZED SIMULATION AND EXPERIMENTAL RESEARCH ON SOFT-SWITCHING ARC WELDING INVERTER POWER SOURCE显示文摘Based on the existing component models in the Pspice software package, a combined model for Insulat- ed the Bipolar Transistor (IGBT) is established, in which a non - linear is introduced to represent the parasitic capacitance. Using this model, computerized simulation is conducted for the FB - ZVZCS - PWM soft - ewitching converter,the switching and energy-transferring characteristics of the components are analyzed.The simulation results are testified by experiments.It is proved that by abopting appropriate models,computerized simulation becomes an effective tool for investigation of arc welding inverter power source. | S. J. Chen S. Y. Yin L. Feng and L. Y. Li( 1) School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China 2)National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 24 |
| 2 | Approaches to functional genomics in filamentous fungi显示文摘在细丝状的真菌的基因功能的学习是在很最近的年里做了大进展的研究的一个领域。很多转变和基因操作策略被开发了并且适用于经济地重要的细丝状的真菌和 oomycetes 的一张多样、很快膨胀的表。与真菌的染色体的重要数字,定序的现在或被定序的、功能的基因组学答应揭开来年里的很多新信息。这评论讨论在在细丝状的真菌检验基因功能被做了并且描述不同途径的优点和限制的最近的进展。 | Richard J Weld Kim M Plummer Margaret A Carpenter Hayley J Ridgway | 2006 | Cell Research2006，16，1： | 19 |
| 3 | ION HEATING PROCESS DURING PLASMA IMMERSION ION IMPLANTATION显示文摘The research on plasma immersion ion implantation has been conducted for a little over ten years. Much is needed to investigate including processing technlogy, plasma sheath dynamics, interaction of plasma and surface, etc. Of the processing methods elavated temperature technique is usually used in PIII to produce a thick modified layer by means of the thermal diffusion. Meanwhile plasma ion heating is more recently developed by Ronghua Wei et al[1]. Therefore the temeperature is a critical parameter in plasma ion processing. In this paper we present the theoretical model and analysize the effect of imlantation voltage, plasma density, ion mass,etc on the temperature rise. | X.B. Tian, X.F. Wang, A.G. Liu, L.P. Wang, S. Y. Wang, B. Y. Tang and P. K. Chu 1)Advanced Welding Production & Technology National Key Laboratory, Harbin Institute of Technology, Harbin 150001, China 2)Department of Physics & Materials Science, City Uni | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 11 |
| 4 | SIMULATION ON HEATING PROCESS IN ULTRASONIC WELDING OF PLASTICS显示文摘The energy conversion during ultrasonic plastic welding is analyzed on the basis of the theory of vis- coelastic mechanics,.The temperature field and the temperature change of the ABS specimen with ener- gy director during ultrasonic welding is simulated with finite element method(FEM). In the simu- lation process,the melting of the energy energy is also considered. The calculation results are in good agreement with the temperature measurement results, which proves that the simulation results are reli- able. | S. Q. Yang Z. Dong J. C. Yan and J. B. Ju( National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 10 |
| 5 | INTERFACIAL STRUCTURE AND PHASE REACTION IN SiC/NiCr ALLOY JOINT显示文摘Bonding of SiC to SiC using Ni and Ni - 25at%Cr foils was performed at high temperature.Interface structures and reaction phases were investigated by EPMA analyses and XRD diffraction method, re- spectively. At a bonding temperature of 1273K Ni reacts with SiC and forms various Ni silicides con- taining graphite baside SiC. Ni3Si without graphite was formed at Ni side.The interface structure of SiC/Ni joint was SiC/Ni2Si + C/Ni31 Si12 + G/Ni3 Si/Ni. At the interface between SiC and Ni- 25at%Cr alloy the Ni silicide was only Ni2Si at the same bonding temperature,and further(Cr, Ni)7 (Si, C)3 carbide was formed between Ni silicide + graphite zone and Ni - 25at%Cr alloy.The interface structure of SiC/Ni - 25at%Cr alloy was SiC/Ni2Si + C/(Cr, Ni)7 (Si, C)3+Ni(ss. Cr, Si)/Ni - 25at%Cr. | J. C. Feng M. Naka J. C. Schuster(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China Joining and Welding Research Institute, Osaka University, Mihogaoka 11 - 1, Ibaraki, Osaka 567, Japan Institute of P | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 6 |
| 6 | APPLICATION OF ARTIFICIAL NEURAL NETWORK MODELING TO PLASMA ARC WELDING OF ALUMINUM ALLOYS显示文摘By using alternating current plasma arc welding,the influences were studied of such parameters as welding curent,arc voltage,welding speed,wire feed rate,and magnitude of ion gas flow on front melting width,wdle reinforcement,and back melting width of LF6 aluminum alloy.Model of the formation of welding seam in alternating current plasma arc welding of aluminum was set up with the method of artificial neural neural network - BP algorithm. Qyakuty of formation was consequently predicted and evaluated.The experimental result shows that,compared with other modeling methods,artificial network model can be used to more accurately predict formation of weld,and to guide the production practice. | D. K. Zhang and J. T. Niu (National Key Laboratory of AdVanced Welding Production Technology of HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 5 |
| 7 | Present situation and future of welding machinery industry 显示文摘Presentsituationandfutureofweldingmachineryindustry￥LIJianguoandZHUQi(ChengduElectricWeldingMachineResearchInstitute(610051))... | LI Jianguo and ZHU Qi (Chengdu Electric Welding Machine Research Institute (610051 )) | 1994 | China Welding1994，3，2： | 5 |
| 8 | Microstructure and performance of dissimilar joint QCr0.8/TC4 welded by uncentered electron beam显示文摘The mechanical property of dissimilar metal joint between QCr0.8 and TC4 alloy made with centered electron beam is bad and the highest tensile strength of the joint is only about 82.1 MPa.The bad mechanical property is mainly caused by the asymmetric fusion of the two base metals and the generation of the brittle Ti-Cu intermetallic compounds.The finite element analysis shows that the amount of the melted QCr0.8 copper alloy can be added to reduce the amount of the brittle intermetallic compounds.The bias distance to the copper alloy hc has obvious effect on the tensile strength.When hc=0.8 mm,the tensile strength of the joint can reach 270.5 MPa.The reaction layer near the fusion line on the TC4 side consists of the intermetallic compound and the melted base metal which does not react.The joint fractures at the reaction layer and presents quasi-cleavage or transcrystalline rupture in tensile tests. | LIU Wei,ZHANG Binggang,HE Jingshan and ZHAO Haisheng State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001,China | 2007 | Rare Metals2007，26，S1： | 5 |
| 9 | NUMERICAL SIMULATION OF TEMPERATURE FIELDS FOR WELD METAL SOLIDIFICATION CRACKING IN STAINLESS STEELS显示文摘This paper has analyzed the influences of the heat input of welding arc, the latent heat of solidifica- tion,fluid flow of liquid metal on the heat conductivity pertaining to welding solidification crack of stainless steels. As a result,two - dimensional heat conduction models with prescribed heat flux mov- ing along the the have been developed that can simulate welding arc, convection and radiation heat loss from top and bottom surfaces of the workpiece. Finally, the finite element model was used to ana- lyze and calculate the temperature field. | R. P. Liu Z. J. Dong and Y. H. Wei( 1)Harbin Research Institute of Welding, Harbin 150080, China 2)National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 5 |
| 10 | TWO-DIMENSIONAL NUMERICAL ANALYSIS OF PLASMA IMMERSION ION IMPLANTATION OF CYLINDRICAL BORES显示文摘Plasma immersion ion implantation (PIII), unrestricted by sight-light process, is considered a proper method for inner surface strengthening. Two-dimensional simulation oj inner surface PIII process of cylindrical bores were carried out in this paper using cold plasma fluid model, and influence of the bore’s dimension on impact energy, retained dose and uniformity of inner surface were investigated. | A. G. Liu,X.F. Wang, L.P. Wang, S. Y. Wang, B. Y. Tang and P.K. Chu 1) Advanced Welding Production Technology National Key Laboratory, HIT, Harbin 150001, China 2) Department of Physics and Material Science, City University of Hong Kong, 83 Tat Chee Aven | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 11 | Modeling and Control of Welding Flexible Manufacturing Cell Using Petri Net显示文摘A new welding flexible manufacturing cell (WFMC) with intelligent welding sensors was investigated. Based on the analysis of information flow in WFMC, automation Petri net control model has been studied, Which can be extended to complex welding flexible manufacturing system in the future. | Tao QIU Shanben CHEN Yuntao WANG and Lin WU National Key Laboratory of Advanced Welding Production Technology, Harbin institute of Technology, Harbin 150001, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 4 |
| 12 | A General Algorithm of Rotating/tilting Positioner Inverse Kinematics for Robotic Arc Welding Off-line Programming显示文摘Off-line programming provides an essential link between CAD and CAM, whose development should result in greater use of robotic arc welding. An arc welding system with a robot and a rotating/tilting positioner is a major application area, where manual programming is a very tedious job. Off-line programming is a constructive way to solve the problem. The inverse kinematics algorithm of robot and positioner is the foundation of the off-line programming system. Although previously there were some researchers who studied the positioner inverse kinematics algorithm, they only focused on a special solution of the positioner inverse kinematics, which is the solution at down-hand welding position. However, in welding production, welding position other than down-hand position is also needed. A method for representing welding position was introduced. Then a general algorithm of rotating/tilting positioner inverse kinematics is presented. | Jinsong TIAN Lin WU Ming DAI and Yu KONG National Key Laboratory of Advanced Welding Production Technology, Harbin institute of Technology, Harbin 150001, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 4 |
| 13 | STUDY ON DIFFUSION WELDING OF ALUMINIUN MATRIX COMPOSITE显示文摘Effects of diffusion welding parameters on strength of welded joint based on particle reinforced alumini- um matrix composite Al2O3p/6061Al were studied by comparing with aluminium matrix alloy,Mecha- nism for the loss of joint strength was analyzed.It was pointed out that the key processing parameters affecting the strength of joint was the welding temperature.The high quality joint can be successfully obtained with appropriate diffusion welding parameters. | J. T. Niu L. M. Liu J. P. Zhai J. Yu X. M. Zhang (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 750001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 4 |
| 14 | Study on Laser Welding of Al Composite显示文摘The effects of laser welding parameter on strength of welded joints were studied. The mechanism for loss of joint strength was analyzed. It was pointed out that an important factor affecting joint strength is the reaction between matrix and reinforced phase. On the basis of this, the concept of critical St activity a[si]min was proposed. Using appropriate welding parameters and Si activity, high quality laser welded joints in an aluminum matrix composite SiCw/6061Al can be Successfully obtained. | Jitai NIU Zhonghong LAI MuZhen WANG Liming LIU and Lin WU National Key Laboratory of Advanced Welding Production Technology, Harbin institute of Technology, Harbin 150001, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 3 |
| 15 | Effect of Na_2CO_3 on Energy Consumption of Micro-arc Oxidation of Magnesium Alloy显示文摘Micro-arc oxidation(MAO)coatings were fabricated on AZ31 magnesium alloy and the effect of Na2CO3 on the energy consumption was studied.The results show that the concentration of Na2CO3 has a critical effect on the discharge behavior of MAO process.With increasing the Na2CO3 concentration in the electrolyte,the arcing voltage and working voltage decrease.A proper concentration is needed to achieve the highest growth rate of the coatings and the lowest energy consumption per unit coating volume.The addition of Na2CO3 decreases the arcing and working voltage of MAO discharge.It is attributed to that the Na2CO3 leads to much more micropores due to the decomposition of MgCO3 to produce more gas. | Wang Xiaobo,Tian Xiubo,Gong Chunzhi,Yang Shiqin State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China | 2012 | 稀有金属材料与工程2012，41，S1： | 3 |
| 16 | 线性摩擦焊技术介绍显示文摘线性摩擦焊原理线性摩擦焊是摩擦焊的一种。在焊接压力作用下,其中一个焊件相对另一个焊件沿直线方向以一定的振幅和频率作直线往复运动,利用摩擦生热加热待焊接部件的表面,当摩擦表面达到粘塑性状态时,迅速停止摩擦运动,并施加顶锻力,完成焊接。 | Thompson Friction Welding Co. | 2008 | 航空制造技术2008，0，17： | 3 |
| 17 | Density of Liquid Ni-Cr Alloy显示文摘The density of liquid Ni-Cr alloy was measured by a modified sessile drop method. The density of liquid Ni-Cr alloywas found to decrease with increasing temperature and Cr concentration in the alloy. The molar volume of liquidNi-Cr alloy increases with increasing the Cr concentration in the alloy. The molar volume of Ni-Cr alloy determinedin the present work shows a positive deviation from the linear molar volume. | F.XiaoJoining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan | 2003 | Journal of Materials Science & Technology2003，19，1： | 3 |
| 18 | Effects of Cu, Ni, Mn and Mo on the austemperability, microstructures and mechanical properties of ADI weld metal显示文摘EffectsofCu,Ni,MnandMoontheaustemperability,microstructuresandmechanicalpropertiesofADIweldmetalSUNDaqian;ZHOUZhenfengandRENZ... | SUN Daqian ZHOU Zhenfeng and REN Zhenan(Welding Department,Jilin Univercity of Technology. Chuangchun. 130022.) | 1996 | China Welding1996，5，1： | 3 |
| 19 | ADVANCED WAYS OF IMPROVING THE WELDED STRUCTURES显示文摘A package of work is presented on development of highly effective welded structures, currently conducted by the E. O. Paton Electric Welding Institute. New types of cost - effective and reliable welded struc- tures have been developed, including light - weight building structures, bridge frameworks, TV tow- ers, heavy - duty structures from high - strength steels, large-sized stringer panels and shells, unique structures of a transformable volume. A series of methods of investigations of welding stresses and strains have been created, they being characterized by a high accuracy and information content. The physical and mathematical fundamentals of optical simulation of welded stresses have been estab- lished and the theory of their similarity has been constructed. Holographic methods of investigation of the quality and stressed - strained state of welded joints have been advised. Portable holographic sys- tems for been been developed which allow investigations to be conducted without the vibration - insulation facilities. A non-destructive testing method of residual stresses determination has been elaborated based on ultrasonic probing of the appropriate sections of the welded structure. A new trend has been formed, namely the distortion - free welding of structures, which is based on regulation of the thermal processes during welding with the aim of reduction of the heat input and inducing the preliminary stressed - strained states optimized in terms of welding stresses and strains. Specialized procedures and equipment based on the acoustic emission effect have been developed for diagnostics of welded structures. The technology and equipment have been for ultrasonic impact treatment of welded joints in or- der to improve their fatigue resistance, as well as computerized methods for design of welded joints and structures. | L. M. Lobanov (The E. O. Paton Electric welding Institute of the National Academy of Sciences of Ukraine, kiev,Ukraine) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 3 |
| 20 | NUMERICAL SIMULATION OF THE TEMPERATURE FIELD IN A SOLDER BALL UNDER PULSED LASER AND ITS EFFECT ON THE VIBRATION OF THE SOLDER显示文摘The research presented here is focused on the vibration condition of a small volume solder solder ball,which is placed on the surface of a soldering pad and is exerted a pulse modulated continuous wave laser heat source. Finite element method is applied to analyzed the temperature field in the solder ball, and experi- ment is conducted to test the vibration. the results show that,that, the temperature field flucturates with the same frequency as that of the laser pulse, which in turn causes a forced vibration of the same frequency in the liquid solder ball. | C. Q. Wang M. Y. Li and L. Fang (National Key Laboratory of Advanced Welding Production Technology, H. I. T., Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 3 |
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