巻号一覧
後続誌
29 巻, 10 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
研究論文
-
—熔銑に対するカルシウムの作用—丸山 益輝, 渡辺 融1957 年 29 巻 10 号 p. 694-702
発行日: 1957/10/25
公開日: 2012/11/05
ジャーナル フリーUsing metallic calcium and calcium-silicide, effect of calcium on molten iron was studied. Immediately after calcium agent was added to the surface of molten iron, calcium diffused into it, changing the structure of solidificated iron in proportion to the diffused amount of calcium and when a suitable amount of it diffused, it made graphite spheroidal. Nodular graphite structure was easily formed in case of low carbon content, and was formed lesser with the increase of carbon content.
In cases of carbon range contents beyond 3%, however, it was somewhat easy to form nodular graphite structure. It was considered as an alloying effect of calcium besides deoxydizing effect which to be of use to make graphite spheroidal. Residual calcium amounts in nodular graphite iron were 0.007∼0.010%. It was, moreover, ascertained that nodular graphite, in low carbon cast iron treated with calcium agent, deposited from supersaturated austenite with carbon, through under-cooling of iron melt.抄録全体を表示PDF形式でダウンロード (1190K) -
—突出水冷羽口—石川 潔, 佐枝 市郎, 鈴木 俊夫1957 年 29 巻 10 号 p. 702-707
発行日: 1957/10/25
公開日: 2012/11/05
ジャーナル フリーIn the 2nd report, we informed that the blast was unable to penetrate deeply into the cnpola installed with ordinary tuyéres. In this paper, we will report the results of the study on the penetration of the blast into the furnace installed with the prcjecting water-cooled tuyéres.
The gist of the results obtained are as follows :
(1) When the projecting tuyére is used in place of the ordinary one, the blast pressure required to blow the same quantity of blast into the furnace is lowered, and also the tendency of clogging up the tuyére with slag is decreased.
(2) From the distribution of temperature and CO2% in the furnace, it is justly said that the penetration of the blast is considerably improved by using the projecting tuyére.
(3) In this experiment, melting rate, tapping temperature and the chemical components of the metal were not affected mostly by projecting the tuyére.抄録全体を表示PDF形式でダウンロード (741K) -
原 〓一, 柿谷 悟1957 年 29 巻 10 号 p. 708-710
発行日: 1957/10/25
公開日: 2012/11/05
ジャーナル フリーOn the ageing of clay minerals, to find the degree of the penetration of water molecules into the inter-layer of clay minerals, the infrared absorption spectra were taken using Perkin-Elmer 12 type. At the same time, the change of the spacing of (001) for the same specimens were measured by X-ray diffractmeter using Cu Kα radiation.
The specimens used for this investigation were “Kibushi-clay” Torideyama (mixture of Kaolinite and Halloysite) and “Hojun-bentonite” (montmorillonite).
In infrared absorption spectra, it was found that remarkable absorption at 2.8∼3.0μ had appeared for the bentonite of 5 months or more over ageing and the Kibushi-clay over 6 months ageing. Moreover, it was observed that the intensities of two absorption peaks at 2.71μ and 2.76μ for the specimens over 3 months setting has inverted from those for the shorter time setting.
It may be explained probably that the cause of inversion of the intensity ratio is due to the gradual transformation of the kaolinite lattice to the halloysite one by the setting effects.
No detectable changes were observed on the X-ray experiments for these specimens.抄録全体を表示PDF形式でダウンロード (465K) -
—染料吸着に関する一考察—三ケ島 秀雄, 大和田野 利郎1957 年 29 巻 10 号 p. 711-715
発行日: 1957/10/25
公開日: 2012/11/05
ジャーナル フリーTo be acquainted with the general remarks of colour adsorption test of moulding sand, the authors have studied the crystal violet adsorption of sieved silica sand and of clay decantated in water. The concentration of colour was measured by the spectro-photoelectric analysis using the light of wave length, 5920 Å.
The results obtained are as follows :
1. The amount of colour adsorption per gram of sample is proportional to the colour concentration in the concentration of less than 0.1 g/l, and is almost independent of the concentration in the concentration of about 1 g/l.
2. The amount of colour adsorption per gram of silica sand, and of clay, the particle size of which is larger than 2μ, is proportional to the total surface area in a gram of specimens for each, but this relation seems to fail in the un-decanted clay, i. e., colour adsorption per unit area decreases.
3. The amount of colour adsorption per unit surface area of silica sand and clay differs several ten folds.
4. In the case of silica sand, the amount of colour adsorption and green tensile strength are both inversely proportional to the mean size of sand grains and this yields the linear relation between themselves. But, it seems to be very difficult to determine the green strength of the moulding sand by colour adsorption test in the case of ordinarily used unsieved green sand, especially in the case of different spiecies of sand.抄録全体を表示PDF形式でダウンロード (641K) -
—その加熱特性について—原田 梅治, 西山 圭三1957 年 29 巻 10 号 p. 715-721
発行日: 1957/10/25
公開日: 2012/11/05
ジャーナル フリーThe fundamental hot properties of the 4 foundry silica sands which grew in the different conditions and were made of the different methods—Synthetic Silica Sand, Conical Silica Sand, Natural Silica Sand and Beach Sand—were investigated.
By the thermo-balance, 48 mesh and 100 mesh sands of these four silica sands were heated at 3°C/min and the change of the mass were measured, and at each silica sand and each mesh the hot properties were investigated.
Still more, the crystals of these silica sands which were heated at high temperature, were observed by the nicol-microscope.
From the experiments mentioned above, the following evidences were observed.
1) The rate of decrease of mass and the specific gravity in heating become larger by the following order. —i. e. Synthetic Silica Sand is the smallest, Conical Silica Sand second, Natural Silica Sand third, and Beach Sand largest.
2) The cracks grow in the crystals of the silica sands heated at high temperature and become to be crash easily. But the quantities of these cracks are different in each silica sand.
3) The curves of mass of the silca sands in heating, the rate of decrease of mass and specifiic gravity are more suitable to express the purity of silica sand.抄録全体を表示PDF形式でダウンロード (810K)
- |<
- <
- 1
- >
- >|