文献一覧: 一般社団法人溶接学会 (出版者)

This report is researched for the microstructure of joints, which are prepared by the soaking of the copper rods in the bath of molten tin, tin-lead alloy of eutectic composition and in tin powder with flux. 1) The eutectoid temperature of Cu31Sn8 (δ) is 330°C-380°C It is recognized that δ is not formed at the Cu-Sn interface at the above temperature interval even for 30hr-70hr, but Cu3Sn is formed and contacts with Cu. But at 400°C δ contacts with Cu. 2) When Cu-Sn is heated for very short time at 50°C-100°C above the melting point of Sn, Cu3 So and Cu6Sn5 are always formed and Cu3Sn contacts with Cu, Cu6Sn5 contacts with Cu3Sn. Therfore it is thought that these compounds have the important influence on soldering of copper by soft solder and play on important part. Up to now it has been thought that these compounds are not recognized when soldering time is very short. The microstructure of vertical section alone of solder joins have been studied, but the microstructure of the inclined plane of joins have been not observed, therefore these compounds have been passed over, because there very thin. 3) The microstructure and microhardness of these compounds by the diffusion are same with those of the Cu31Sn8, Cu3Sn and Cu6Sn5 phase by melting. The Vickers microhardness of Cu31Sn8, Cu3Sn and Cu6Sn5 are about 590, 530 and 460. 4) Between copper and solid tin are formed these compands Cu3Sn, Cu6Sn5 by diffusion below melting temperature of tin. 5) The free energy of activation calculated from the deposition of tin on copper and brass with flux are 12970cal/g. atom and 12930ca1/g.atom.

2021-08-19 15:00:33
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1 0 0 0 OA 液体金属の物性(III) 液体金属の輸送的性質:粘性と拡散

著者: 飯田孝道
出版者: 一般社団法人溶接学会
雑誌: 溶接学会誌 (ISSN:00214787)
巻号頁・発行日: vol.63, no.2, pp.70-75, 1994-03-05 (Released:2011-08-05)
参考文献数: 11
被引用文献数: 3 3

2021-08-17 01:54:55
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1 0 0 0 OA オーステナイト系ステンレス鋼JJ1極厚共金溶接材の極低温破壊靱性及び発熱・温度上昇

著者: 進藤裕英高橋知貴堀口勝三小堀智之真田和昭
出版者: 一般社団法人溶接学会
雑誌: 溶接学会論文集 (ISSN:02884771)
巻号頁・発行日: vol.15, no.2, pp.370-375, 1997-05-05 (Released:2009-06-12)
参考文献数: 10
被引用文献数: 2 1

JJ1 type austenitic stainless steel is emerging as the preferred structural material for superconducting magnet casings to operate at liquid helium temperature (4K). In order to evaluate the cryogenic fracture toughness and the temperature rise of tangsten inertgas (TIG) weld in 200 mm thick forged JJ1 type austenitic stainless steel plate for fusion reactor magnets of the next generation, elastic-plastic fracture toughness (JIC) tests were performed with 1T compact tension specimens at 4K. Testing was conducted in accordance with ASTM standards E813-87 for determining JIC using the unloading compliance technique to monitor crack growth. Au/0.07% Fe -Chromel thermocouples were used to measure the temperature rise near the crack tip. The effects of specimen location and nitrogen content on JIC are examined. Specimens were subjected to scanning electron microscopy (SEM) after fracture testing. The effect of inclusion content on the elastic-plastic fracture toughness parameters (JQ, JIC) is also discussed using optical microscopy and energy dispersive X-ray spectrometer (EDX).