Transactions of the Japan Welding Society最新文献_第5页

Oxygen Absorption and Oxide Inclusion of Iron Weld Metal during Arc Welding 电弧焊中铁焊缝金属的氧吸收与氧化物夹杂

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.5.396

T. Kuwana, Yoshihiro Sato

{"title":"Oxygen Absorption and Oxide Inclusion of Iron Weld Metal during Arc Welding","authors":"T. Kuwana, Yoshihiro Sato","doi":"10.2207/QJJWS.5.396","DOIUrl":"https://doi.org/10.2207/QJJWS.5.396","url":null,"abstract":"Pure iron plates were welded using pure iron electrode wire in a controlled arc atmosphere. Effects of the oxidizing gas partial pressure in the welding atmospheres of Ar-O2 and Ar-CO2 gas mixture and welding conditions on the oxygen contents and the nonmetallic inclusions of the iron weld mteals were systematically studied.The results are as follows:1. The mean temperature of the iron weld pool is about 1910 K.2. The oxygen contents and the inclusions of the iron weld metals decrease with increasing the welding current and increase with increasing the arc voltage.3. The oxygen contents and the inclusions of the iron weld metals decrease slightly with increaseing the traveling speed.4. In Ar-O2 welding atmosphere, the oxygen contents and the inclusions of the iron weld metals increase with increasing the oxygen partial pressure, but the oxygen contents become constant value at about 0.26 wt.% in high oxygen partial pressure atmosphere. In Ar-CO2 welding atmosphere, the oxygen contents and the inclusions of the iron weld metals increase with increasing the carbon dioxide partial pressure. The oxide inclusions are seemed to be FeO.5. Behavior of the oxygen absorption into the iron weld metal is discussed using thermodynamic data.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115373799","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: 8

Joining of Titanium-Matrix Composites Reinforced with SiC-CVD Fiber. SiC-CVD纤维增强钛基复合材料的连接研究。

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.581

T. Onzawa, A. Suzumura, J. H. Kim, K. Takagami

{"title":"Joining of Titanium-Matrix Composites Reinforced with SiC-CVD Fiber.","authors":"T. Onzawa, A. Suzumura, J. H. Kim, K. Takagami","doi":"10.2207/QJJWS.9.581","DOIUrl":"https://doi.org/10.2207/QJJWS.9.581","url":null,"abstract":"In this study, we have been investigated on joining of titanium-matrix composites reinforced with SiC-CVD fiber (FRM) to FRM by tensile tests of the joints using butt joint, with a doubler and overlap length of 20 mm. The joinability was compared with solid state diffusion bonding and diffusion brazing using commercially pure copper and Ti-37.5Zr-15Ni-10Cu amorphous filler.As for mechanical properties of the joint, even the joint made at 1143 K for 5 min under the joining pressure of 12 MPa, which is slightly higher than that required in solid state diffusion bonding of the same material, was fractured in the base metal with tensile strength of 1400 MPa, resulting a joint efficiency of about 96%. The fiber damage decreases the strength of the joint as the joinging pressure increases. The diffusion brazability using commercially pure copper of 5 μm thickness at 1153 K was obtained good joint efficiency for 3 min under the joining pressure of 2 MPa, lower than that of diffusion bonding. In the diffusion brazability using Ti-base filler metal, the strength of the joint was equal to the strength of the base metal.Butt joint, with a doubler and overlap length of 10 and 15 mm, failed in shear at a tensile stress in the base material, resulting in a shear strength of about 125 MPa. The poor results were attributed to composites material of lower interlaminar shear strength.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114565868","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

Effect of Pulsed Welding Current on Solidification Cracking in Austenitic Stainless Steel Welds 脉冲焊接电流对奥氏体不锈钢焊缝凝固裂纹的影响

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.7.245

T. Shinoda, Y. Ueno, I. Masumoto

引用次数: 22

A Study on Object Modeling of Plate Structure by Parts Representation and Its Local Relations. 基于零件表示及其局部关系的板结构对象建模研究。

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.507

H. Maekawa, Fumihiko Nagai, H. Horibe, S. Nakata

引用次数: 0

Weldability of 6% Superaustenitic Stainless Steel for Seawater Applications 海水用6%超奥氏体不锈钢的可焊性

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.154

T. Ogawa, T. Koseki

引用次数: 7

Influence of Microstructure in the Heat-Affected Zone on the Reheat Cracking Susceptibility of Cr-Mo steel 热影响区组织对Cr-Mo钢再热开裂敏感性的影响

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.398

Mitsuru Nakamura, Late Toshio Enjo, Y. Kikuchi

{"title":"Influence of Microstructure in the Heat-Affected Zone on the Reheat Cracking Susceptibility of Cr-Mo steel","authors":"Mitsuru Nakamura, Late Toshio Enjo, Y. Kikuchi","doi":"10.2207/QJJWS.9.398","DOIUrl":"https://doi.org/10.2207/QJJWS.9.398","url":null,"abstract":"by Mitsuru Nakamura, Late Toshio Enjo and Yasushi Kikuchi Influence of microstructure in the Heat-Affected Zone on the reheat cracking susceptibility of Cr -Mo steels (11/4Cr-1/2Mo steel , 21/4Cr-lMo steel and 5Cr-1/2Mo steel) were studied. Reheat crackingg tests on 3 type steels were carried out by means of three point bending method, constant-strain rate test on heating and constant-load test on heating. Influence of microstructure of synthetic HAZ at high temperature during the reheat treatment process was investigated by atomic absorption spectrometry, X-ray diffraction and scanning electron microscopic observation. The relation between the concentration of alloying elements in the precipitated carbides and their concentration in the matrix of synthetic HAZ were investigated. The effect of this relationship on the stress relaxation behavior was discussed. The results are summarized as follows. 1) The reheat cracking susceptibility of Cr-Mo steels were very low. The reason why it is estimated that it had good stress relaxation behavior during reheat treatment process. 2) The reheat cracking susceptibility of Bainitic structure specimens (Air Cooled) was the higher than that of Lath-martensitic structure specimens (Water Quenched) of 11/4Cr-1/2Mo steel and 21/4 Cr-lMo steel. But, it was not occured to reheat cracking on both specimens A.C and W.Q of 5Cr-1/ 2Mo steel. 3) The difference of reheat cracking susceptibility could be explained by the stress relaxation behavior of specimens and change of the concentration of alloying elements in the matrix. Especially, change of Cr content during the reheat treatment process is effective.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132311947","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

Analysis of laser transformation hardening process of hypoeutectoid steel. 1st Report, Formulation and computer model for coupled analysis between temperature field and structural changes. 亚共析钢激光相变硬化过程分析。温度场与结构变化耦合分析的公式与计算机模型。

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.50

Katsunori Inoue, E. Ohmura, N. Ohata, Yasuyuki Takamachi

引用次数: 1

Oxygen and Nitrogen contents of Multilayer Weld Metal by Submerged Arc Welding 埋弧焊多层焊缝金属的氧、氮含量

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/qjjws.9.512

K. Shimizu, N. Iwamoto, T. Akamatsu, S. Ukita, K. Miyasaka

{"title":"Oxygen and Nitrogen contents of Multilayer Weld Metal by Submerged Arc Welding","authors":"K. Shimizu, N. Iwamoto, T. Akamatsu, S. Ukita, K. Miyasaka","doi":"10.2207/qjjws.9.512","DOIUrl":"https://doi.org/10.2207/qjjws.9.512","url":null,"abstract":"This study was made on the oxygen and nitrogen contents and notch toughness of the multilayered weld metal produced by submerged arc welding.The results obtained are summarized as follows.(1) The oxygen content of multilayered weld metal increased as the number of layered weld metal increased.(2) The nitrogen content of multilayered weld metal is almost constant irrespective of the number of layered weld metal.(3) The silicon content of multilayered weld metal increased as the number of layered weld metal increased, and the oxygen content of multilayered weld metal shows the similar tendency.(4) The manganese content of multilayered weld matal increased by MnO included flux, and decreased by flux without MnO as the number of layered weld metal increased.(5) The carbon content of multilayered weld metal decreased as the number of layered weld metal increased.(6) The impact value of multilayered weld metal is roughly constant, but the value of last layered weld metal decreased slightly.(7) The oxygen and nitrogen contents of weld metal does not change remarkablly irrespective of heat treatment.(8) The oxygen content of weld metal increased as the welding current increased, but the nitrogen content in weld metal decreased as the welding current increased, and the impact value of weld metal generally decreased as the welding current increased.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129069316","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

A Study on Mechanical Properties of the Grain Growth Region in Gold wire Ball Bonding 金丝球焊晶粒生长区力学性能研究

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.587

Y. Ichiyama, T. Saito, Y. Ohno

引用次数: 3

A new formula for estimating HAZ maximum hardness in welded steel. 一种估算焊接钢热影响区最大硬度的新公式。

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.4.90

Haruyoshi Suzuki

引用次数: 12