Transactions of the Japan Welding Society最新文献_第2页

Changes of Root Gap during Welding in Case of Butt Weld Joints (3rd Report) : In Case of Butt Weld Joints with Tack Welds 对接焊缝焊接过程中根部间隙的变化(第3次报告):对接焊缝带有钉焊的情况

Transactions of the Japan Welding Society Pub Date : 1982-10-01 DOI: 10.2207/QJJWS1943.50.392

K. Satoh, Kazuhiro Nohara

引用次数: 2

Development of Three Wires Submerged Arc Welding Technique for the Production of Large Diameter and Heavy Wall Thickness Line Pipes (Report 1) : Factors on Bead Shape and Sound Weld Metal 大直径、厚壁管线三丝埋弧焊技术的发展(报告1):影响焊头形状和焊缝质量的因素

Transactions of the Japan Welding Society Pub Date : 1982-10-01 DOI: 10.2207/QJJWS1943.50.379

Kiyoe, K. Hirabayashi, T. Taira, H. Ichinose

{"title":"Development of Three Wires Submerged Arc Welding Technique for the Production of Large Diameter and Heavy Wall Thickness Line Pipes (Report 1) : Factors on Bead Shape and Sound Weld Metal","authors":"Kiyoe, K. Hirabayashi, T. Taira, H. Ichinose","doi":"10.2207/QJJWS1943.50.379","DOIUrl":"https://doi.org/10.2207/QJJWS1943.50.379","url":null,"abstract":"The development of three wires submerged arc welding techniques was carried out to produce line-pipes in the large-diameter and heavy-wall-thickness from 20 to 50 mm by UOE process. Some factors on a sound weld metal and a bead shape have been clarified as follows.(1) The good correlation between the penetration depth of the weld bead and the sum of 3√ I4/v⋅V2a at the leading and the middle wire could be obtained. The bead width had the good correlation with the heat input, and it was spread by an increase of the welding current and/or the arc voltage at the middle and the trail wire or by a decreasing of the welding speed.(2) The stable arc voltage and the good bead appearance can be obtained in the use of a large diameter welding wire because of lowering down the current density in it. The wire of 4.0 mm in diameter is too small to get a good weld bead, but the wire of 6.4 mm in diameter is so rigid that undercuts in the weld bead are sometimes caused by the unstable wire feeding. As a result the optimum wire may be 4.8 mm in diameter.(3) As lengthening a wire spacing, nitrogen and oxygen content in a weld metal are increased and they deteriorate the Charpy value, so that each wire spacing is desired to set within about 30 mm.(4) To get the high welding speed due to increasing a melting rate may be to weld at a high welding-current, but in this case, weld defects of the bead appearance such as undercuts are caused because of the hunting of the arc voltage happened by higher welding-current. Therefore sums of the welding current in three wires are desired to be about less than 3000 Amp. and the welding current at each wire is limited in the use of the fused flux.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128376532","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: 3

Improvement of Toughness in the Weld Metal of High Purity 30Cr-2Mo Steel by Addition of REM : Study on Welding Metallurgy in High Purity Ferritic Stainless Steels (Report 2) 添加REM提高高纯30Cr-2Mo钢焊缝金属韧性——高纯铁素体不锈钢焊接冶金研究(报告二)

Transactions of the Japan Welding Society Pub Date : 1982-10-01 DOI: 10.2207/QJJWS1943.50.508

Y. Nakao, K. Nishimoto, M. Terashima

引用次数: 1

Study on Behaviour of Molten Pool in Arc Welding (2nd Report) : Numerical Analysis of Molten Pool Surface Profile 电弧焊熔池行为的研究(第二次报告):熔池表面轮廓的数值分析

Transactions of the Japan Welding Society Pub Date : 1982-10-01 DOI: 10.2207/QJJWS1943.50.525

Kimiyuki Nishiguihi, T. Ohji, H. Koga

引用次数: 3

Study on Brittle Fracture Initiation from Weld Defect (Second Report) : Fracture from Notch of Poor Penetration Type 焊缝缺陷引发脆性断裂的研究(第二报告):低渗透型缺口断裂

Transactions of the Japan Welding Society Pub Date : 1982-10-01 DOI: 10.2207/QJJWS1943.50.398

Shigeo Akashi, Mitsuhiro Natsume, M. Fukuzawa

{"title":"Study on Brittle Fracture Initiation from Weld Defect (Second Report) : Fracture from Notch of Poor Penetration Type","authors":"Shigeo Akashi, Mitsuhiro Natsume, M. Fukuzawa","doi":"10.2207/QJJWS1943.50.398","DOIUrl":"https://doi.org/10.2207/QJJWS1943.50.398","url":null,"abstract":"The brittle fracture from a weld defect of through-thickness type (crack length 2a=10-30 mm) for mild steel, which had relatively low toughness, was investigated and compared with the behavior of base metal with machined notch. Results are summarized as follows:1) In bending COD tests, δc(-10)=0.3 mm and δc(-40)=0.2 mm were obtained for a weld defect notch on the manual arc welding. While for the same notch on non-gas arc welding, δc(-10)=0.3 mm and S δc(-40)=0.09 mm were obtained. For the latter, COD characteristic depended well on the temperature.2) In tensile tests on notched specimen of welded joint and base metal at -10°C and -40°C, low stress fracture did not occur and overall strain el exceeded yielding strain ey. But the value of e1 for welded joint was larger than that for base metal. In welded joints, the yielding of parent metal adjacent to weld occured preceding to yielding in the net ligament of weld metal which had higher yielding stress than parent metal. Consequently, for these overmatched joints the Burdekin's design curve gave a conservative estimate in the yielding range.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134080793","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: 0

Strength of the Welded Joints on which Shear Force is Applied at Low Temperature (Part II) : Effect of throat Depth Weld Length 低温剪切力作用下焊接接头的强度(第二部分):喉道深度和焊缝长度的影响

Transactions of the Japan Welding Society Pub Date : 1981-07-05 DOI: 10.2207/QJJWS1943.50.367

K. Seo, H. Hirano, K. Satoh

引用次数: 0

Underwater Cutting Using a Consumable Electrode Water Jet Technique at a Deep water Depth 在深水中使用耗材电极水射流技术进行水下切割

Transactions of the Japan Welding Society Pub Date : 1981-04-01 DOI: 10.2207/QJJWS1943.50.409

M. Hamasaki, Fumikazu Tateiwa

引用次数: 3

Effect of Residual Tensile Stresses on Threshold Level for Fatigue Crack Propagation in Welded Joints of SM50B Steel 残余拉应力对SM50B钢焊接接头疲劳裂纹扩展阈值的影响

Transactions of the Japan Welding Society Pub Date : 1981-04-01 DOI: 10.2207/QJJWS1943.50.161

A. Ohta, E. Sasaki, Masahide Kamakura, Masatoshi Nihei, M. Kosuge, Masao Kanao, M. Inagaki

{"title":"Effect of Residual Tensile Stresses on Threshold Level for Fatigue Crack Propagation in Welded Joints of SM50B Steel","authors":"A. Ohta, E. Sasaki, Masahide Kamakura, Masatoshi Nihei, M. Kosuge, Masao Kanao, M. Inagaki","doi":"10.2207/QJJWS1943.50.161","DOIUrl":"https://doi.org/10.2207/QJJWS1943.50.161","url":null,"abstract":"The fatigue crack propagation rate and the stress intensity threshold level were measured on welded joints which were made by three kinds of welding processes, manual arc welding with covered electrode, gas metal arc welding, and submarged arc welding. The specimens were 200 mm wide center notched type. The material was a SM50B steel 20 mm in thickness. The fatigue crack propagation properties of the weld metal and the heat affected zone of these welded joints were found to be quite similar to each other and inferior to that of the base metal. The stress intensity threshold level of welded joints was about one fourth of that of the base metal. It is assumed that the inferiority of welded joints in crack propagation properties may be caused from the tensile residual stresses distributed in the middle part of the specimens. The removal of the tensile residual stresses by postweld heat treatment could improve welded joints in the fatigue crack propagation properties. The fatigue crack propagation properties and the stress intensity threshold level of welded joints after the postweld heat treatment are similar to those of the base metal.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133749417","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: 26

Deformation Behaviors and Fracture Characteristics in Plate Containing Two Collinear Notches 含两个共线缺口板的变形行为与断裂特征

Transactions of the Japan Welding Society Pub Date : 1976-04-01 DOI: 10.2534/JJASNAOE1968.1975.138_461

K. Nagai, K. Kajimoto

{"title":"Deformation Behaviors and Fracture Characteristics in Plate Containing Two Collinear Notches","authors":"K. Nagai, K. Kajimoto","doi":"10.2534/JJASNAOE1968.1975.138_461","DOIUrl":"https://doi.org/10.2534/JJASNAOE1968.1975.138_461","url":null,"abstract":"A series of research so far carried out, has clarified that among various kinds of multiple notches existing in steel structures, the collinear notch has the largest influence upon brittle fracture initiations. In this research, therefore, the collinear notch is taken up as the subject of study, and examination is made on deformation behaviors ahead of notch tip and on fracture characteristics by elastic-plastic analysis based on the finite element method (FEM) and by experiments.The results are summarized as follows : (1) A crack opening displacement (COD) obtained by FEM is approximately equal to the theoretical value by E. Smith and a measured value by Moire method, which enables the coefficient of interaction effects of notches to be estimated by FEM.(2) When notches are contiguous very closely to each other, fracture stress is decreased and at the same time the critical COD is decreased. Therefore the concept of COD is not simply applicable to that case. The reason for the occurrence of such phenomenon is clarified through examination of the relation between the plastic strain in notch tip zone and the COD which are respectively calculated by FEM.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116683922","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

Insert-type Electron Beam Welding Technology (Report 1) : Characteristics of Insert-type Welding 插入式电子束焊接技术(报告1):插入式焊接的特点

Transactions of the Japan Welding Society Pub Date : 1973-04-01 DOI: 10.2207/QJJWS1943.43.931

Y. Arata, K. Terai, H. Nagai, Iwao Futami, S. Shimizu, T. Aota

{"title":"Insert-type Electron Beam Welding Technology (Report 1) : Characteristics of Insert-type Welding","authors":"Y. Arata, K. Terai, H. Nagai, Iwao Futami, S. Shimizu, T. Aota","doi":"10.2207/QJJWS1943.43.931","DOIUrl":"https://doi.org/10.2207/QJJWS1943.43.931","url":null,"abstract":"6mmおよび12mm厚さの2 1/4Cr-1Mo鋼(ASTMF 22)とオーステナイト系ステンレス鋼(AISI 316)の異材継手および炭素鋼(SM 41A)の同材継手について,インサート型電子ビーム溶接による適正裏波溶接条件選定を目的とした諸試験を行なった結果,次の結論を得た.1)最大溶込み深さ部近傍における溶接部の諸特性のうち,スパイク現象については,最大スパイク長さが1.5mm以下のものが全体の約80%を占め,それを越える長さのスパイクの発生頻度は急激に減少する.また,ペネトロパラメータPpが約6以上になると,1.5mmをこえる長さのスパイクが発生し易い.なお,ビード断面形状については,溶込み部先端が極端に細いクサビ(Wedge)型ビードを形成する.いっぽう,最大溶込み深さ部以外における溶接部の諸特性のうち,スパイク現象については,1.5mmをこえる長さのスパイクが発生し始めるPp,sはab>0.90のときPp,s>6,ab≈0.90でPp,s≈6,ab 0.90の場合はビード断面形状は井戸(Well)型に近く,ab≦0.90の場合はクサビ(Wedge)型に近い.2)インサート型電子ビーム溶接法による裏波溶接においては,インサートメタルの幅以上の断面ビード幅を有し,スパイク現象の発生が少なく,表面および裏面部のビード幅がほぼ等しいような井戸型ビード断面形状の得られる溶接条件を選定しなければならない.このような条件を満足するabはほぼ1.20前後である.また継手形状としては,ルートスペースを有する継手形状を採用することにより,裏波溶接が容易になる.また,良好な表面および裏波ビードを得るためには,ビード断面形状および余盛高さの観点より,インサートメタルの高さを継手部の厚さにほぼ等しくなるように選定することが望ましい。3)ルートスペースを有する継手形状を採用することにより,適正溶接条件範囲が広くなり,板厚が増大するにつれてその有効性は著しくなる.その場合の裏波ビード形成機構は対流型に近づく.また,管の溶接の場合において問題となるスパッタについても,ルートスペースを付すことにより,著しく減少し,実用的価値が高い.4)脱酸不十分な炭素鋼の同材継手において,インサートメタルを使用しない場合には欠陥の発生は著しい.しかし,強脱酸性を有するアルミキルド鋼のインサートメタルを使用した場合にはインサートキャップ高さ(またはインサートメタル高さ)または断面積が増大するに従って溶接部に発生する欠陥は減少する。","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114621291","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