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35 巻, 6 号
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研究論文
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岡林 実, 生田 聰夫1963 年 35 巻 6 号 p. 331-337
発行日: 1963/06/25
公開日: 2012/10/22
ジャーナル フリーWe have done some experiment in a new moulding method-Air Setting Process. This new process (we call this A.S.P. for short) has indeed a point of excellent merit in its peculiar strength. But, some troubles exists in the fact that the process is attended with veining, for which any reliable way of prevention has not been estalished. Therefore, the authors, taking the following five itesms into considerations, carried out a series of experiments and tried to establish a new A.S.P. procedure free from the veining.
1. The chemical reaction between mould face and molten metal.
2. The character and the content of binder and mixture of sand.
3. The sand ramming.
4. The presence of surface paint and its kind.
5. The aridity of mixture sand.
Followings made clear by the experiments are as follows:
1. The relation between the degree ramming of sand and the “Veining” is not definite in the authors experimental range.
2. The veining can be prevented under the following conditions.
i) For moulds having 3% drying oil, drying temperature shall be 250°C
ii) For moulds having 2% drying oil, drying temperature shall be in the range of 200∼300°C.
iii) When the surface paint was used in case i), temperature may be 200°C.
3. The effect of mixture to prevent veining is not so remarkable.抄録全体を表示PDF形式でダウンロード (691K) -
錦織 徳郎1963 年 35 巻 6 号 p. 337-344
発行日: 1963/06/25
公開日: 2012/10/22
ジャーナル フリーIn this paper, relations between the bentonites and the thermal expansion of three elements system sands, which is composed of silica sand, bentonite and moisture were sought in order to find the effects of bentonite on the thermal expansion of mould.
As the result of this experiment, it was found that the higher the swelling capacity of bentonite, the smaller becomes the thermal expansion of the mould.抄録全体を表示PDF形式でダウンロード (729K) -
―可鍛鋳鉄の靭性の向上に関する研究―奥本 武臣, 近藤 賢治1963 年 35 巻 6 号 p. 344-353
発行日: 1963/06/25
公開日: 2012/10/22
ジャーナル フリーThe research was aimed to improve the impact properties of a black heart malleable cast iron by adding small amounts of special elements to it. In this report, which is the third report of the series, the effects of addition of V, Co, Mo and W were investigated.
The results were summarized as follows. V has a remarkable effect in increasing the maximum absorbed energy of malleable cast iron at impact test. Co has little effect on the impact prperties of this iron. Mo increases the maximum absorbed energy of this iron, shifts the transition temperature to lower side and prevents galvanizing embrittlement. W has the effect of decreasing the susceptibility of the iron to galvanizing embrittlement.抄録全体を表示PDF形式でダウンロード (843K) -
草川 隆次, 中田 栄一1963 年 35 巻 6 号 p. 354-363
発行日: 1963/06/25
公開日: 2012/10/22
ジャーナル フリーThe morphology of graphite and matrix in cast iron depends, in the common sense, on the chemical composition, melting and casting conditions and freezing behavior. However a bottleneck to establish the strict relationship has impeded further developments in the strength and rupture of cast iron. In this point of view, some variables of graphite governing the rupturing mechanism of cast iron were determined on the basis of the bending and tensile tests in a definite shape of test coupons.
It is found that the volume, form, orientation, and distribution of graphite are the appropriate variables which may govern the strength and rupturing mechanism of iron.
The “deep etching method” might satisfy the requirement identify the feature, size, orientation and distribution of graphite even more substantially, which included dissolving out the matrix deeply in the aqua regia and depositing copper over the graphite surface in the copper solution.抄録全体を表示PDF形式でダウンロード (1514K)
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