巻号一覧
後続誌
32 巻, 3 号
選択された号の論文の6件中1～6を表示しています
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研究論文
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―特に低炭素鋼の鋳肌荒れを対象とした―小林 一典1960 年 32 巻 3 号 p. 159-167
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーThere is much difference in the properties of the sand mold from that of Shell Mold. The thermal property is one of them. This is attributed to1) the organic material contained in Shell Mold as a binder the amount of which is more than in Oil Sand, 2) to the facts that less amount of Mold Sand exists arround the casting than in Sand Mold. Investigation has been carried out on the some characteristics as follows,
i) Study on the Skin-Formation rate and the time and temperature range of thermal decomposition of phenolic Resin.
ii) Study on the physical properties of Shell Molds.
iii) Study on the Thermal Analysis of Shell Molds.
iv) Determination of mold Constant from the rate of Skin-Formation.抄録全体を表示PDF形式でダウンロード (851K) -
丸山 益輝, 伊藤 充1960 年 32 巻 3 号 p. 167-171
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーIn previous reports, it was deduced that, using calcium silicide as the calcium agent, calcium was the unstabilizer to the cementite in Fe-C-Si alloy. However, as the silicon dissolves into molten iron the calcium agent and the deoxidation takes place as a necessary consequence, effects of silicon and deoxidation exist, strictly speaking, in the experimental results obtained. Then, in this report, using metallic calcium as the calcium agent and adding it to the deoxidized molten iron (1.58-1.78%C), effect of calcium on the stability of cementite was again investigated.
Deoxidation and the existence of silicon and calcium reduced the stability of cementite in Fe-C-Si alloy. The existence of calcium, however, surpasses the others is effect. The iron molten under vacuum and the calcium added iron had almost the same contents of oxygen. From the results obtained, it was concluded that the unstabilization of cementite was mainly caused by the direct effect of calcium itself, but not by the deoxidizing effect of calcium.抄録全体を表示PDF形式でダウンロード (761K) -
菊地 政郎1960 年 32 巻 3 号 p. 172-177
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーIn the author's experiments hitherto done,1)-6) structural changes showed in Fig. 1-3 occured in Fe-C-Si alloys (0.41-4.04%C, 1.0%-6.0%Si) due to Vacuum-melting. The cause of these structural changes was attributed to the oxygen contained in molten iron. Two forms, oxides (mainly SiO2) and oxygen in “cluster” form (assumpted by Chipman)12), were adopted as to the oxygen in fluencing the graphitization of the alloys, the former keing considered to behave as the nuclei for graphite separation from molten pig, Promoting graphitization, and the latter to have hindering effect for graphitization, stabilizing cementite. The structural changes observed by the author (Fig, 1-3) were explained by the reciprocal action of these two forms of oxygen. Various phenomena observed commonly in cast iron were also. explained from this theory.抄録全体を表示PDF形式でダウンロード (760K) -
高橋 忠義, 萩原 巌1960 年 32 巻 3 号 p. 178-185
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーTo control the degree of welding between molten cast iron and the core of low carbon steel in camlachie cramp, a quantity, “their volume ratio” is usually used. In this experiments, the authors examined the effects of the cast iron and steel and of the shape of steel on the limits of welding at constant volume ratio.
The following results were obtained.
1) The relation between the degree of welding and the volume ratio, which is usually used, was only satisfactory under the condition that their mass did not largely change.
That is, in the camlachie cramp, the relation of “Similitude” did not hold well.
This was also confirmed from the heat calculation.
2) The welding was lasier, when the surface of steel larger.
On the other hand, Tensile tests was carried out on materials of the camlachie cramp. the results are as follows:
1) Tensile strength of the camlachie cramp, which consisted of the low carbon steel and cast iron, becomes the sum of their respective tensile strengths.
2) It was concluded that the steel containing Mo contributed markedly to the inerease of tensile strength.抄録全体を表示PDF形式でダウンロード (889K) -
雄谷 重夫, 本間 梅夫1960 年 32 巻 3 号 p. 186-190
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーVarious attempts have been made to determine the mechanism of gas absorption and behavior of dissolved gases in the molten aluminium bronze. Little gas absorption is caused from bubbling water vapour in the melt, from prolonged stewing or from elevated heating temperature. On the other hand, if the melt contains any deoxidising elements such as calcium, berryllium and magnesium, destructive gas absorption occurs through bubbling or exposing of water vapour. Heavy gas absorption is also caused from bubbling or exposing of hydrogen. Density or porosity in the castings may be affected by elevated pouring temperature and prolonged holding period between the occurence of gas absorption and pouring. The effect of degassing process is also described in the present paper.抄録全体を表示PDF形式でダウンロード (589K) -
高瀬 孝夫, 万谷 泰一郎1960 年 32 巻 3 号 p. 191-196
発行日: 1960/03/25
公開日: 2012/10/30
ジャーナル フリーSeveral experimental results about the hot-tearing of alloys have been reported by some investigators.
A new apparatus for measuring casting stress during solidification was built by the authors.
By this new apparatus the casting stress was measured directly and continuously during solidification.
The results obtained are summarized as follows:
(1) Stress beginning temperatures and hot temperatures, at which stress was initiated and hot crack appeared, were measured between liquidus and solidus points.
(2) Alloys which have large temperature range between stress beginning and solidus points have the tendency to crack. Pure metal, eutectic alloy and short solidification interval alloy are least susceptible to cracking.
(3) Hot crack occured generally at the grain boundry of alloy.
(4) Important factors of the hot cracking phenomenon are the size and shape of primary crystal, residual quantity and quality of liquid metal at the stress beginning and hot cracking point.
(5) Al-Si alloys with Si 0.36∼1.8%, Al-Cu alloys with Cu 1.0∼9.4% and Al-Mg alloys with Mg 4∼7% were susceptible to cracking. The results for Al-Si alloys agree well with that of Verö.抄録全体を表示PDF形式でダウンロード (666K)
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