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35 巻, 11 号
選択された号の論文の9件中1～9を表示しています
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俵 國一, 鈴木 淳友1949 年 35 巻 11 号 p. 369-373
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーA sub-committee had been set up in 54 sectional committee of Japan Science Promation Society to investigate the variation of temperatures and other conditions in a blast furance under normal conditions. In collaboration with the Japan Iron and Steel Company, actual experiments had been carried out twice at Wanishi Iron Works, once at March 1943, while next at December in the same year. The present report describes the results of the first investigation while the second one will be treated in second part of this report.
The charge of Wanishi blast furnace at that time composed principally of bog iron ores from Hokkaido and poor cokes rich in ash, so several times irregularities in operation had been happened. The efforts had been made to know the cause of those disturbances and some hints were obtained.抄録全体を表示PDF形式でダウンロード (3043K) -
佐藤 忠雄, 堀川 一男1949 年 35 巻 11 号 p. 373-378
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーThe effect of furnace atmosphere on the melting of cast iron by electric are furnace were investigated. Results obtained were as follows.: -The main occurrence of defects of cast iron manufactured by electric are furnace should be the oxidation of molten metal by the furnace at mosphere at the melting period of raw materials. Si in molten metal is most affected by the furnace atmosphere, because the molten metal is oxidized at relatively lower temperature. The content of FeO in molten slag on the molten metal at the melting period has no effect to the molten metal but the time of slag off and the composition of 2ndry slag shall be taken more attention, for the temperature of furnace is higher. The content of FeO in molten slag is lowest at CaO/SiO2=1.2-1.3 on basic f ??, and 0.4 on acid f ?? .
The effect of H2 is more obvions as far as the effect of oxide is negligible small.抄録全体を表示PDF形式でダウンロード (2283K) -
堀川 一男1949 年 35 巻 11 号 p. 378-381
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーIn this second report, experiments carried out on thick forgings were given. The form of the forgings was the cylinder, and dimensions were outer dia. 660, inner dia. 480 and length 4500mm.
The isothermal annealing operation consists in (1) heating the steel to a temperature just above its Ac range (2) cooling in air from γ state to the predetermined subcritical point (3) charging the steel into the furnace kept at the predetermined temperature and keeping the temperature constant- ly for a given time (4) cooling from that temperature to the atmospheric temperature in air. The producer gas fired furnace was used.
The results obtained were summarized as follows;
(1) The isothermal annealing operation of low alloy steel thick forgings is quite easy.
(2) The time required for this annealing process is 1/2 or less of the ordinary process.
(3) The annealed structure is satisfactorily and uniformly softened.
(4) The isothermal annealing develops the machinability of steel on account of its low hardness.
(5) This new annealing method has no bad influence upon the heat treating operation after annealing and mechanical properties after hardening and tempering.抄録全体を表示PDF形式でダウンロード (2140K) -
出口 喜勇爾, 渡邊 誠一郎1949 年 35 巻 11 号 p. 382-393
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーWe studied on the hot-die steels as follows: (1) The various mechanical properties, not only at the room temperature, but also at the high temperature, especially the high temperature impact hardness, of the low C-high W-Cr-V steel. (2) The influences of C and V of this steel on the mechanical properties. (3) The influences of W. From these data we could confirm that W content may be lowered to about half amount, if C content is kept at about 0.5%. (4) Furthermore the various mechanical properties at the room and the high temperature of about 0.7% C, medium Cr, low Cr, Cr-V, low Cr-Ni-Mo, medium Cr-Ni-Mo and high Cr-Ni-W steels. (5) The mass efiects of these steels by the test pieces φ90mm×90mm height.抄録全体を表示PDF形式でダウンロード (5257K) -
多賀谷 正義, 伊佐 重輝1949 年 35 巻 11 号 p. 393-397
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーSeveral heat resisting steel wires of Fe-Cr and Fe-Cr-Al system were tested. This paper contains the following results of test and some discussion: The tensile. strength, elongation and specific resistance at high temperature up to 1200°C. Variation of the tensile strength, elongation, number of repeated bending and specific resistance at room temperature after long time heating at 500°C, 600°C, 700°C & 800°C. Life. Value at 1100°C and 1200°C.抄録全体を表示PDF形式でダウンロード (2448K) -
新持 喜一郎1949 年 35 巻 11 号 p. 397-401
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーThe author investigated the durabilities of plain carbon and Si-Mn spring-steels by repeated impact tests. The results are as follows:-
(1) The author supposes that Si-Mn steel is superior to plain carbon steel when the energy of impact is beyond a certain limit and the latter is superior to the former when the energy is below it.
(2) Si-Mn steel is lower than plain carbon steel in the tensile strength and yielding point against equal hardness, and higher in the elongation, reduction, impact value and durability.
(3) Durability is higher with higher elongation, reduction and impact value.抄録全体を表示PDF形式でダウンロード (1691K) -
非金屬介在物定量法の研究越谷 粕藏1949 年 35 巻 11 号 p. 401-405
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーVarious chemical methods for the determination of non-metallic inclusions in metal were re'examined. Among various residuel analyses, above all the nitric acid method was recognized as the most suitable one.
In molten steel including silicon, the reaction, FeO+Si→SiO2, occurs during soliditication and new inclusion appears in addition to the true inclusion. Therefore the quantity of inclusions depends on the verocity of solidification, that is, on the size of ingot mould. In case of no silicon bath, it is almost equal independent of solidifying velocity.
Therefore a special vacuum samspling apparatus is required for the purpose of measuring true inclusion in molten steel, but it iS inconvenient for ordinary use. For that reason a small iron ingot mould-its size was determind, considering to check the segregation of inclusions-was adopted in order to make the condition of-solidification constant.
If the standard sample is forged before analysis, the value of inclusion will be higher. The inclusions that increase by forging are SiO2 and Al2O3. FeO and MnO rather usually decrease a little.抄録全体を表示PDF形式でダウンロード (904K) -
1949 年 35 巻 11 号 p. 406-408
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーPDF形式でダウンロード (921K) -
1949 年 35 巻 11 号 p. 409-410
発行日: 1949/11/25
公開日: 2009/07/09
ジャーナル フリーPDF形式でダウンロード (744K)
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