巻号一覧
68 巻, 1 号
選択された号の論文の7件中1～7を表示しています
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論説
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水渡 英昭1997 年 68 巻 1 号 p. 5-12
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーReoxidation of aluminum by FetO, MnO and SiO2 in ladle slag was studied using the activities of components in CaO-SiO2-Al2O3-MgO slag. Modification of inclusions composition in calcium treatment was also thermodynamically discussed. Furthermore, the characteristics of slag deoxidation, the stability region of spinel MgO·Al2O3, and the control of inclusions composition in bearing and valve spring steels by top slag were studied from the thermodynamic viewpoint.抄録全体を表示PDF形式でダウンロード (118K) -
本庄 則夫, 森 広司1997 年 68 巻 1 号 p. 13-20
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーA new scrap preheater, named MSP(Multistage Super Preheater),has been developed by Daido Steel Co., Ltd. MSP is a kind of shaft-type Preheater and has two chambers, upper stage and lower stage. Steel-maded fingers which support the load of scrap are provided in both chambers. To investigate the basic functions of shaft-type preheater, experimental equipment was installed and scrap preheating experiments were carried out. The experimental results are as follows. (1) After 30 minutes heating by about 1200; gas, the average scrap temperature is 500~600;, and preheating efficiency is 35~45%. (2) Scrap oxidation proceeds by the heating at the temperature of more than 6 0 0 ;,and its rate reaches as much as 10%/hour by the heating at the temperature of 1200;.抄録全体を表示PDF形式でダウンロード (114K) -
河合 良英, 芝田 智樹1997 年 68 巻 1 号 p. 21-28
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーStream and filling pattern in the low pressure counter gravity casting mold was measured by conductive probe method and effect of pressure reduction rate and mold size was investigated. It is revealed that the molten metal flow rate in the mold was limited at the crampest part of the mold and velocity varies according to the cross sectional area of the channel under same pressure reduction condition. Though metal stream front reaching time to the cavity part was proportional to the metal rising velocity in the sprue, fill up time was抄録全体を表示PDF形式でダウンロード (149K)
解説
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水上 義正, 武内 美継, 野呂 克彦1997 年 68 巻 1 号 p. 29-34
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーPDF形式でダウンロード (142K)
技術資料
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天野 肇, 狩野 隆, 木村 健一郎1997 年 68 巻 1 号 p. 35-44
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーThe problems of solidification in the mold of continuous casting cause q break-out, and w Surface defects. Daido Steel has installed Mold Solidification Condition Detecting System at No.1CC in Chita Plant to get the correct solidification condition in the mold and to encounter them adequate-ly. The following are the results that we got in the development period. (1) Sticking break-out can be detected correctly by the on-line judging system using neural network and the learning system. (2) We can prevent break-out by reducing casting speed with the alarm system which is associated with the judging system. (3) We can also detect the depressions on the bloom surface, and on-line judging of the bloom surface quality can be performed. We will connect the bloom quality information to the on-line judging system for conditioning method in the future. (4) It is possible to detect longitudinal cracks which are accompanied with depressions with use of the above system, but it is found out to be difficult to detect them at the position far more than 30 mm from the measuring point. To抄録全体を表示PDF形式でダウンロード (277K) -
秋山 善紀, 稲葉 英明, 竹鶴 隆昭1997 年 68 巻 1 号 p. 45-51
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーHigh speed tool steel contains a greater concentration of special elements than any other tool steel. These elements are combined with carbon to form very hard carbide that has improved wear properties, eventually increasing the strength of the tool. Continuous casting of such high speed tool steel, which has self hardening and low toughness characteristics, is very difficult, and, in its technological infancy, break out and broken billet problems occurred with distressing regularity, leading some to suggest that continuous casting was nigh well impossible to achieve. However, we report here that improvements in operation technology and facilities have resulted in a breakthrough in the manufacture of high speed tool steel, and we announce that we have achieved 100% manufacturing using the continuous casting process.抄録全体を表示PDF形式でダウンロード (224K) -
服部 篤, 森 広司1997 年 68 巻 1 号 p. 53-59
発行日: 2000/03/27
公開日: 2000/03/27
ジャーナル フリーIron carbide has been expected as alternative iron sources for EAF steel抄録全体を表示PDF形式でダウンロード (308K)
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