Transactions of JWRI最新文献_第3页

Recent Advances in Welding Power Systems for Automated Welding 自动化焊接电源系统研究进展

Transactions of JWRI Pub Date : 1994-06-01 DOI: 10.2207/QJJWS1943.64.457

M. Ushio, H. Yamamoto, Y. Nishida, T. Mita

引用次数: 13

FEM Simulation of Gas and Plasma Cutting with Emphasis on Precision of Cutting(Mechanics, Strength & Structural Design) 以切割精度为重点的气体和等离子切割有限元模拟(力学、强度和结构设计)

Transactions of JWRI Pub Date : 1994-06-01 DOI: 10.2534/JJASNAOE1968.1994.307

Y. Ueda, H. Murakawa, S. Gu, Y. Okumoto, M. Ishiyama

引用次数: 4

A Predicting Method of Welding Residual Stress Using Source of Residual Stress (Report III) : Prediction of Residual Stresses in T- and I-joints Using Inherent Strains(Mechanics, Strength & Structural Design) 利用残余应力源预测焊接残余应力的方法(报告三):利用固有应变预测T型和i型接头的残余应力(力学、强度与结构设计)

Transactions of JWRI Pub Date : 1993-08-01 DOI: 10.2207/qjjws.6.59

Y. Ueda, M. Yuan

引用次数: 34

Effects of Shielding Gas Composition on Metal Transfer Phenomena in High Current GMA Welding(Physics, Process, Instruments & Measurements) 保护气体成分对大电流GMA焊接中金属转移现象的影响(物理、工艺、仪器与测量)

Transactions of JWRI Pub Date : 1993-08-01 DOI: 10.22486/IWJ.V27I2.148271

M. Ushio, K. Ikeuchi, Manabu Tanaka, T. Seto

引用次数: 5

Formation of YBaCu-O System Superconductor by Thermal Spraying(Materials, Metallugy & Weldability) 热喷涂制备YBaCu-O体系超导体(材料、冶金与可焊性)

Transactions of JWRI Pub Date : 1991-06-01 DOI: 10.1080/10426919208947398

A. Ohmori, S. Sano, Y. Arata, N. Iwamoto

引用次数: 1

Carbide Addition on Aluminum Alloy Surface by Plasma Transferred Arc Welding Process(Surface Processing) 等离子转移弧焊在铝合金表面添加碳化物(表面处理)

Transactions of JWRI Pub Date : 1990-12-01 DOI: 10.2464/JILM.40.761

F. Matsuda, K. Nakata, S. Shimizu, K. Nagai

引用次数: 7

Convection in Weld Pool and Its Effect on Penetration Shape in Stationary Arc Welds(Physics, Process, Instrument & Measurement) 焊池对流及其对固定弧焊熔透形状的影响(物理、工艺、仪器与测量)

Transactions of JWRI Pub Date : 1987-12-01 DOI: 10.2207/QJJWS.6.455

A. Matsunawa, S. Yokoya, Y. Asako

{"title":"Convection in Weld Pool and Its Effect on Penetration Shape in Stationary Arc Welds(Physics, Process, Instrument & Measurement)","authors":"A. Matsunawa, S. Yokoya, Y. Asako","doi":"10.2207/QJJWS.6.455","DOIUrl":"https://doi.org/10.2207/QJJWS.6.455","url":null,"abstract":"The importance of convective heat transfer in the weld pool has been widely recognized in relation to the penetration shapes of base metal.The main causes that associate streaming in molten pool are the electro magnetic force, buoyancy force, surface tension and aero dynamic drag force. But, the mechanism of heat transfer has not yet been clarified well. Therefore, in this work, they have paid special attension on the importance of convectional heat transfer in the weld pool and the anode size or heat source size under the same heat input, or same current value. A finite difference method was employed to solve above-mentioned mechanism. The results obwere tained as follows.1) When arc length is short, the velocity field induced by outward surface shear strss consists of two flow loops of opposite directions in the molten pool, which lead to comparatively deep weld shape.2) In case of short arc length and positive temperature coefficient of surface tension, surface tension is predominant. Accordingly, penetration shape is deep.3) In case of long arc length aero dynamic drag force is predominant, which leads to the 'shallow' center and 'deep' peripheral penetration.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82520660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Study on the Strength of Explosive Plugged Part under the Environment of Steam Generator 蒸汽发生器环境下爆炸塞件强度的研究

Transactions of JWRI Pub Date : 1987-12-01 DOI: 10.2207/QJJWS.6.71

Yoshiaki Yamamoto, S. Kaga, Katsuhiro Fujii, Y. Fujioka, Katsunori Inoue, Y. Arata

{"title":"Study on the Strength of Explosive Plugged Part under the Environment of Steam Generator","authors":"Yoshiaki Yamamoto, S. Kaga, Katsuhiro Fujii, Y. Fujioka, Katsunori Inoue, Y. Arata","doi":"10.2207/QJJWS.6.71","DOIUrl":"https://doi.org/10.2207/QJJWS.6.71","url":null,"abstract":"Supposing the case in which leakage takes place in tubing of steam generator, the explosive plugging method was developed by Japan Welding Engineering Society etc. It was indicated by the researchers that this method is effective to the purpose.It is not yet known whether the plugged parts keep the stable strength or not, during the long service period in the environment of steam generator.Under the above consideration, following three tests on plugged part are conducted.1. Thermal Shock Test2. Stress Corrosion Cracking Test3. Liquid Sodium Corrosion TestTesting results are grained as follows.1. Peeling occures immediately after beginning of thermal shook test. Cracking occures after 150-200 thermal cycles in SH, 200-400 thermal cycles in EV and 1000 thermal cycles in SG.2. Residual stress in tube plate near the plug is compressive. SCC does not occur in the tube plate there. It occures on the inner surface of plug.3. The susceptibility to SCC of explosive bonded boundary is lower than that of base metal due to martensite in bonded boundary.4. Explosive bonded boundary is somewhat weaker than base metal in the resistance to the sodium attack under the testing condition employed in liquid sodium corrosion test.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85524889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Compressive Strength of Structural Members with Soft Weld Joints(Mechanics, Strength & Structural Design) 软焊缝构件抗压强度(力学、强度与结构设计)

Transactions of JWRI Pub Date : 1987-06-01 DOI: 10.1080/09507119009447771

Y. Ueda, H. Murakawa, H. Kimura

引用次数: 1

Joining of Silicon Nitride Using Amorphous Cu-Ti Filler Metal(Materials, Metallurgy & Weldability) 非晶Cu-Ti填充金属连接氮化硅(材料、冶金及可焊性)

Transactions of JWRI Pub Date : 1987-06-01 DOI: 10.2207/QJJWS.4.597

M. Naka, Tasuku Tanaka, I. Okamoto

{"title":"Joining of Silicon Nitride Using Amorphous Cu-Ti Filler Metal(Materials, Metallurgy & Weldability)","authors":"M. Naka, Tasuku Tanaka, I. Okamoto","doi":"10.2207/QJJWS.4.597","DOIUrl":"https://doi.org/10.2207/QJJWS.4.597","url":null,"abstract":"Si3N4/Si3N4 joint was made using Cu66Ti34, Cu50Ti50 and Cu43Ti57 amorphous filler metals, where pressureless sintered Si3N4 was used. The joining strength of Si3N4 joint was measured by fracture shear testing, and the joining mechanism was investigated by microstructure observation with SEM, and elements analyses at the joint interface with EDX and EPMA. The results obtained are summarized as follows.(1) The molten Cu-Ti alloys containing 20 at% Ti or more exhibit the equilibrium contact angle of about 8°, and are applicable to the filler metal for joining of Si3N4.(2) The joining strength of Si3N4 using Cu66Ti34 filler is higher than that of Si3N4 using other Cu-Ti fillers at any brazing temperature except for brazing temperature of 1273 K. Thus, the joining strength of Si3N4 with Cu66Ti34 filler shows the maximum value of 313.8 MPa at brazing temperature of 1323 K. At the brazing temperature of 1373 K, Si3N4 joint with Cu50Ti50 filler shows the maximum value of 176.5 MPa at brazing time of 1.8 ks, and gradually decreases with longer brazing lime, and to 19.6 MPa at brazing time of 7.2 ks. The elevated temperature fracture shear strength of Si3N4 joint brazed at 1373 K for 1.8 ks using Cu50Ti50 filler increases to 199.1 MPa at 373 K, and gradually decreases to 105.9 MPa at 973 K.(3) During brazing Ti in molten Cu50Ti50 filler reacts with Si3N4 by the following reactions. Si3N4(s) +4Ti(1)=4TiN(s)+3Si(s), and Si3N4(s)+9Ti(1)=4TiN(s)Ti5Si3(s). TiN at the interface between Si3N4 and the filler, Ti5Si3, and Cu-Si phase at the central part of the filler are formed. The activation energy for growth of TiN at the joining interface is 206.3 kJ/mol, and the growth of TiN is dominated by the diffusion of N in TiN. The silicon content of the Cu-Ti phase increases about 7 at%Si to about 20 at%Si with increasing the brazing temperature.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88583010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9