Transactions of the Japan Welding Society最新文献_第7页

Underwater Automatic Oxy arc Cutting of Thick Tubes at Water Depth up to 150m 水下自动氧弧切割厚管水深达150米

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS1943.50.972

M. Hamasaki, Y. Ogawa, M. Katsumura, Yoshiro Matsukawa, Hiroshi Nakamura

引用次数: 0

Effect of Form and Size of Backing Strip on the Bending Fatigue Strength of Butt Welded Joint 背带形式和尺寸对对接焊接接头弯曲疲劳强度的影响

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/qjjws1943.50.362

H. Nisitani, Hiroyuki Tanaka, Youichi Misawa, Nobuyuki Besho

{"title":"Effect of Form and Size of Backing Strip on the Bending Fatigue Strength of Butt Welded Joint","authors":"H. Nisitani, Hiroyuki Tanaka, Youichi Misawa, Nobuyuki Besho","doi":"10.2207/qjjws1943.50.362","DOIUrl":"https://doi.org/10.2207/qjjws1943.50.362","url":null,"abstract":"Since a fatigue crack of the butt welded joint with a backing strip initiates at the toe of root, fatigue strength of the joint may be strongly influenced by the form and size of the backing strip. Therefore, reversed bending tests were carried out to clarify the relation between stress concentration and fatigue strength of the butt welded joint with a backing strip, by varying the form. and size of the backing strip.In a notched specimen, when a non-propagating crack exists at the root of a notch whose radius is smaller than the root radius of a notch at the branch point (the critical point where a non-propagating crack appears), the fatigue limit of the notched specimen can be estimated from the maximum stress at the root of a notch with no crack developing, whose radius is equal to that at the branch point.As the butt welded joint with a backing strip can be considered as a kind of sharp notches, the fatigue limit of the joint is estimated in a similar manner as in the case of a sharp notch.The specimens used are the simulated specimens cut out from a SS41 plate.The main results obtained are as follows;(1) As the thickness of a backing strip or the root opening decreases, fatigue strength of the butt welded joint increases.(2) In the butt welded joint with a backing strip, the existence of reinforcement increases fatigue strength of the joint.(3) When the notch radius at the toe of root is smaller than the critical radius for the existence of a nonpropagating crack, the fatigue limits of the joint are almost the same under the condition of constant thickness of the specimen and backing strip.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"32 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":"121532558","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

Proposal of Implant Type Torsion Test for Estimating Adhesive Strength of Sprayed Coatings 估算喷涂涂层粘接强度的植入式扭转试验的建议

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/qjjws.9.561

T. Terasaki, T. Akiyama, Tomoyoshi Kaneko, H. Hisada

引用次数: 2

Effect of Grain Boundary Structure on Weld Decay of Austenitic Stainless Steel (Part 2) : Grain Boundary Structure and Carbide Precipitation in Type 304 Stainless Steel Weld Heat Affected Zone 晶界组织对奥氏体不锈钢焊缝衰减的影响(二):304型不锈钢焊缝热影响区的晶界组织与碳化物析出

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.264

H. Kokawa, T. Kuwana

引用次数: 1

Weldability of High Strength Martensitic Stainless Steels 高强度马氏体不锈钢的可焊性

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS1943.50.458

Shigetsugu Asakura, M. Nihei

{"title":"Weldability of High Strength Martensitic Stainless Steels","authors":"Shigetsugu Asakura, M. Nihei","doi":"10.2207/QJJWS1943.50.458","DOIUrl":"https://doi.org/10.2207/QJJWS1943.50.458","url":null,"abstract":"Influences of the conditions of weld thermal cycle and postweld heat treatment on the notch toughness, tensile properties and crack sensitivity in the HAZ of two high strength (80 kg/mm2 type and 100 kg/ mm2 type) martensitic stainless steels containing Ni, Mo, Nb and Cu were investigated by means of welding thermal cycle simulating method and the slit type cracking test. The results of these tests are sum-marizsed as follows.(1) In the case of 80 kg/mm2 type steel (base metal A), the impact value steeply falls when thermal cycle above 1, 300°C peak temperature is experienced, and recovery of the impact value due to the postheating is little even with postheating at 650°C for 2 hours.(2) In case of the 100 kg, /mm2 type (base metal B; precipitation hardening) steel, the impact value does not almost decrease even though peak temperature of the thermal cycle is changed within the range of Ac1 point-1, 300°C. However, postweld aged at 500°C for 4 hours after exposure to the tehrmal cycle, the impact value drops remarkably when the peak temperature of the thermal cycle exceeds 950°C.(3) In the multipass weld joint tests on two test steels which was carried out under optimum welding procedure and postweld haet treatment as shown in Table 4, satisfactory notch toughness and tensile properties were obtained.(4) In the slit type cracking test, the HAZ cracking can be perfectly prevented when the preheating temperature was higher than 200°C for base metal A and 100°C for base metal B, and holding temperature after welding was at 100°C for each kinds of the test steels and then postheated at 600°C for 10 minutes.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"23 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":"127373850","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

Blast Erosion Properties of Sintered Ceramics and Sprayed Coatings 烧结陶瓷和喷涂涂层的鼓风侵蚀性能

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.74

Y. Itoh, Masashi Takahashi, M. Saitoh, H. Kashiwaya

{"title":"Blast Erosion Properties of Sintered Ceramics and Sprayed Coatings","authors":"Y. Itoh, Masashi Takahashi, M. Saitoh, H. Kashiwaya","doi":"10.2207/QJJWS.9.74","DOIUrl":"https://doi.org/10.2207/QJJWS.9.74","url":null,"abstract":"The final properties of our study is to discuss the selection of surface modification processes and/or materials from a viewpoint of blast erosion properties. In this study, an experimental investigation was carried out on the blast erosion resistance of sintered ceramics and ceramic sprayed coatings. Three different coatings of WC-12Co, Al2O3 and Cr2O3, which were produced by FLSP and PSP, were examined in comparison with the sintered ceramics. The effect of test conditions, such as blast angle and blast particle size, on the erosion resistance were made clear. The better correlation between volume erosion rate and Vickers hardness after erosion could not be obtained from the experimental results. It appears that the blast erosion properties of sintered ceramics and ceramic sprayed coatings may be affected by not only the hardness but also the fracture toughness. It was also confirmed by experiments that the material (process) selection could be easily conducted using the relationship of the erosion resistance between the blast angle 30° and 90°. It made clear that the effect of blast angle on the volume erosion rate of the sintered ceramics and sprayed coatings could be approximately estimated by the assumption of sinΨ (Ψ: blast angle) dependency.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"40 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":"127495859","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

Study on Liquid Phase Diffusion Welding of Nickel Base Superalloy Used Ni-B System Alloyed Layer Formed on Bonding Surface with Sputtering. 用溅射法在键合表面形成Ni-B系合金层液相扩散焊接镍基高温合金的研究。

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.365

Takao Funamoto, Kato Mitsuo, R. Kajiwara, K. Yasuda, T. Shida, F. Matsuda

{"title":"Study on Liquid Phase Diffusion Welding of Nickel Base Superalloy Used Ni-B System Alloyed Layer Formed on Bonding Surface with Sputtering.","authors":"Takao Funamoto, Kato Mitsuo, R. Kajiwara, K. Yasuda, T. Shida, F. Matsuda","doi":"10.2207/QJJWS.9.365","DOIUrl":"https://doi.org/10.2207/QJJWS.9.365","url":null,"abstract":"Liquid phase diffusion welding of Ni-base superalloy (IN738LC) was studied. In this study, the surface of IN738LC was cleaned by Ar ion bombardment and an alloyed layer (Ni-B alloy, Ni-Cr-Si-B alloy) was deposited on the bonding surface by sputtering.In this report, the effect of Ar ion bombardment on melting temperature of alloyed layer formed on base metal, penetration of alloyed layer into base metal and weldability, and the effect of composition of alloyed layer on melting temperature of alloyed layer, penetration of alloyed layer into base metal and weldability were investigated.The main results indicated that : (1) The penetration was increased by cleaning with Ar ion bombardment.(2) Penetration of Ni-Cr-Si-B alloyed layer was larger than penetration of Ni-B alloyed layer and melting temperature range of Ni-Cr-Si-B alloyed layer was larger than melting temperature range of Ni-B alloyed layer.(3) Pressure of welding used Ni-Cr-Si-B alloyed layer was lower than pressure of welding used Ni-B alloyed layer. (4) Weldability with cleaning was better than weldability without cleaning (5) Tensile strength of welded joint was the same as tensile strength of base metal, but elongation and reduction of area were lower than elongation and reduction of area of base metal. But mechanical property was improved by diffusion heat treatment.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"7 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":"125272301","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 Ambient Temperature on Steel Weldability 环境温度对钢材可焊性的影响

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/qjjws.9.252

T. Kasuya, N. Yurioka

{"title":"Effect of Ambient Temperature on Steel Weldability","authors":"T. Kasuya, N. Yurioka","doi":"10.2207/qjjws.9.252","DOIUrl":"https://doi.org/10.2207/qjjws.9.252","url":null,"abstract":"It is well known that there are four main factors for cold cracking probability in a heat affected zone (HAZ), i.e., carbon equivalent, diffusible hydrogen content, welding thermal history and residual stress. Using these four factors, several criteria have been presented to avoid cold crack-ng. At low ambient temperaturel welding without prehaeting is sometimes preculded, because the surface of a welded plate might be frozen. On the other hand, high tensile strength modern steels have low carbon equivalent owing to such newly developed processes as thermomechanical control, which means that steeleweldability is much higher than that of the old days. And because of this tendency, reducing carbon equivalent, many opportunities will occur that welding, sometimes without preheating, is condicted at low ambient temperature. However, there are few research reports which examine the effect of ambient temperature on steel weldability. The authors examined the eqect of ambient temperature on cold cracking susceptibility. Temperatures chosen were 20°C, -10°C and -30°C. The Tekken test method was applied to steels, and five macro sections were machined from every tets piece to observe cold cracking in hte HAZ. From the experimental results, it is concluded that it must be considered as an additional independent factor for cold cracking susceptibility. To assess this effect, the modified carbon equivalent is introduced.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"4 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":"125413112","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

Wettability and Interaction of Silver-base Brazing Alloy Melts to Spheroidal Graphite Cast Iron 银基钎焊合金熔体对球墨铸铁的润湿性及相互作用

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/QJJWS.9.354

Y. Ono, K. Ōgi

{"title":"Wettability and Interaction of Silver-base Brazing Alloy Melts to Spheroidal Graphite Cast Iron","authors":"Y. Ono, K. Ōgi","doi":"10.2207/QJJWS.9.354","DOIUrl":"https://doi.org/10.2207/QJJWS.9.354","url":null,"abstract":"フェライト球状黒鉛鋳鉄は鋼に匹敵する強度を持ち, また靱性にも優れるため産業用機械や自動車部品などに幅広く利用されている.この鋳鉄を鋼等の異種材料と接合するときアークなどを用いる融接法では,鋳鉄の再溶解部のチル化による脆化が問題となる.また鋳鉄を共析変態点以上に加熱すると,基地がオーステナイト化し冷却過程でパーライト及びマルテンサイト変態して靱性を劣化させる可能性がある. ろう材の中で銀ろうは比較的融点が低く接合強度も大きいため,鋼をはじめ高強度合金の接合に幅広く利用されている.フェライト鋳鉄用の銀ろうとしては融点が共析温度以下のJIS.BAg1~3があるが,これらはCdを含有し有害なCdヒュームを発生する.Cdヒューム発生量は温度の上昇とともに増加し,適正ろう付温度の100 K以上になると,溶接作業管理基準(WES9007)におけるCdの管理濃度を大きく越える.Cdを含有しない低融点の銀ろうとしてRA。Hardingは49Ag-16Cu-23Zn -4.5Ni-7.5Mn合金を開発し,フェライト球状黒鉛鋳鉄との接合実験を行い,母材に匹敵する接合強度を得ている.ろう付において確実で健全な接合を得るためには, ろうが継手間隙に流入し十分広がる必要があり,母材に対するろうのぬれ性の良いことが重要である.フェライト球状黒鉛鋳鉄はフェライト基地中に黒鉛が分散した複合組織であるため,ろうとのぬれ性は黒鉛一銀ろう,フエライトー銀ろう間のぬれの平均的なものになると予測される.また,界面では合金層や拡散層のような反応層の形成,母材の溶け出しなど複雑な反応が生じ,ぬれや接合強度など界面に依存した性質に影響するものと考えられるが,上記のNi,Mn含有銀ろうはじめ,ろうと鋳鉄との接合過程の詳細に関する研究は少ない.そこで本研究では,フェライト球状黒鉛鋳鉄に対する銀ろうのぬれ挙動及び両者の界面反応について,銀ろうの化学組成, 雰囲気及び温度との関係で研究した.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"13 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":"117118218","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

Wetting and Reaction Products Formed at the Interface Between SiC and Cu-Ti Alloys SiC与Cu-Ti合金界面形成的润湿和反应产物

Transactions of the Japan Welding Society Pub Date : 1900-01-01 DOI: 10.2207/qjjws.9.519

T. Nishino, S. Urai, I. Okamoto, M. Naka

引用次数: 1