著者
菅野 利猛
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 = Journal of Japan Foundry Engineering Society (ISSN:13420429)
巻号頁・発行日
vol.78, no.1, pp.23-29, 2006-01-25
参考文献数
16

&nbsp;&nbsp;Nirayama reverberatory furnace is located at lzunokuni-city of lzu-Peninsula, Shizuoka-Prefecture. Hagi reverberatory furnace exists at Hagi-city, Yamaguchi-Prefecture, but Nirayama's one is the only one architectures that could make cast iron cannon. There are still remained some unknown matters as follows ; (1) whether cast iron was really melted or not, (2) what kind of pig-iron was used, (3) whether blowing of bellows were utilized or not, (4) what kind of fuels were used, (5) where firebricks were made, etc. On this Nirayama reverberatory furnace, the possibility of casting of cannon with iron was investigated, with melting experiment from a foundry engineering standpoint. <br>&nbsp;&nbsp;The followings are presumed from the investigation. Firstly, at least three cannons of cast iron were manufactured. Secondly, high Silicon contained pig-iron could not be available, so casting of iron cannon was not well done. Finally, the melting time by reverberatory furnace, from preheating to pouring completion, was about eight hours and melting temperature was above 1623K.
著者
杉山 明 安田 秀幸 柳楽 知也 吉矢 真人 上杉 健太朗 梅谷 啓二 大中 逸雄
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 = Journal of Japan Foundry Engineering Society (ISSN:13420429)
巻号頁・発行日
vol.83, no.3, pp.131-136, 2011-03-25
参考文献数
11
被引用文献数
1

It is well known that controlling the graphite shape in cast iron is a critical issue to achieve appropriate properties. It is of interest to know how the microstructure in cast iron evolves during solidification. So far, time-evolution of the microstructure has not been observed in-situ. This paper presents the in-situ observation results of cast iron solidification using X-ray imaging of synchrotron radiation. Transmission X-ray images with a spatial resolution of as small as 5<i>μ</i>m were obtained by an X-ray detector SATICON in an imaging beam line 20B2 at SPring-8. A 10 × 10 × 0.1mm specimen was melted and solidified in a mold made of Al<sub>2</sub>O<sub>3</sub> placed in a vacuum chamber. The observation showed that the solidification started with austenite dendrites, after which the eutectic structure was formed. Graphite clusters of about 100<i>μ</i>m in diameter were formed in the remaining liquid surrounded by the eutectic structure at a cooling rate of less than 10K/min. At a cooling rate of 10K/min, the primary dendrite and the eutectic grains moved up and down, respectively, due to the bouncy force.