著者
瀬渡 賢 青木 篤人 田代 真一 田中 学
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.6, no.1, pp.28-32, 2017
被引用文献数
4

In order to perform stable pure argon MIG welding, duplex current feeding MIG welding has been developed. In the previous experimental study, higher droplet temperature and deeper weld penetration were obtained in the duplex current feeding MIG welding compared with those of the conventional MIG welding. However, the similar effects are considered to be realized also by the conventional MIG welding with short wire extension through increase in welding current. In this paper, basic characteristics of the duplex current feeding MIG welding were compared with those of the conventional MIG welding with the short wire extension. Consequently, it was found that the duplex current feeding MIG welding achieved the deeper weld penetration without an undercut unlike in the case of the conventional MIG welding with the short wire extension.
著者
村田 博敏 土中 夏樹 水野 諭 サンチェス エドムンドJr. 難波 邦彦 井田 民男
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.3, no.5, pp.276-282, 2014-09-20 (Released:2015-08-01)
参考文献数
8
被引用文献数
4 10

In recent years, the development of bio-energy in cooperation with an ASEAN country is a very important issue for both participating countries, which would be able to build a win-win relationship. ASEAN countries have a large amount of unused biomass resources. However, raw biomass business does not seem to work well based on experience unless a new technology is introduced. The Bio-coke (referred to as BIC) is a domestic energy technology in Japan. In this study, Bio-coke made from unused resources of fruits that are imported in large quantities from ASEAN countries is being focused. The compressive strength measured for Banana peel Bio-coke was 98.4 MPa at initial moisture of 1.81 mass% while the Orange peel Bio-coke measured 167.0 MPa at initial moisture of 0.52 mass%. Meanwhile, the apparent Yang's modulus ratio based on cool compressive test for the former is about 4.0 GPa and 4.5GPa for the latter. Through hot compressive test at 973 K, 8 MPa was recorded for Banana peel Bio-coke and about 4.2 MPa for Orange peel Bio-coke.
著者
花田 修賢 杉岡 幸次 高瀬 史裕 宮本 岩男 高井 裕司 緑川 克美
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
高温学会誌 (ISSN:03871096)
巻号頁・発行日
vol.30, no.2, pp.105-110, 2004
被引用文献数
4

Crack-free microfabrication of sapphire with little debris deposition and little swelling around ablated regions by laser-induced plasma-assisted ablation (LIPAA) using a second harmonic of Q-switched Nd:YAG laser is described. LIPAA process has been originally developed by ourselves in which merely a single conventional pulsed laser is used. In this process, the wavelength of laser beam must be transparent to the substrate, so that the laser beam goes through the substrate first and is then absorbed by a metal target placed behind. For laser fluence above ablation threshold for the target and below damage threshold for the substrate, the laser-induced plasma is generated from the metal target and then the species fly towards the rear surface of the substrates with very high speed. Due to the interaction of the laser beam and the plasma, ablation takes place at the rear surface of the substrate. Dependence of ablation depth and width of ablated grooves on scanning speed and target-substrate distance are investigated. Based on the obtained results, LIPAA process is applied for scribing of sapphire substrates. Double scan of laser beam with a shift of the focal point shows a great potential of high-quality scribing of sapphire substrates.