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- W2325885061 abstract "In 1949, KOBE STEEL WORKS-LTD. started the study on titanium in co-operation with Dr. Nishimura and Dr. Kushima of Kyoto University and Dr. Asada of Osaka University. This study was industrialized in 1959 at Takasago Plant of the same company. The annual capacity of titanium ingot production then was 360 tons. Since then, improvement and modernization of technology and equipments have been carried out and at present, the production capacity of this plant is more than 600 tons.The statistics shows that during the past two years, about 80 per cents of total consumption of titanium sponge was made by KOBE STEEL who melted it into ingot. In the United States, the aircraft and missile industries consumes 95 per cents or more of the total production of titanium mill products. In this country, however, the most of the titanium production goes to chemical industries, such as petrochemical, petroleum refining, synthetic fibre, urea, paper and pulp, sodium and other industries. In this connection, the most of the titanium products of the KOBE STEEL is what so called commercially pure titanium, in which is the most popular.This report is to explain the properties of KS-50.By statistical means, it was clarified the quality standard of the metal forgings and that this standard is satisfactorily useful for manufacturing KS-50 titanium sheet, which has the metallurgical uniformity.The analysis of varience for regression of yield strengh, tensile ductilities and oxygen contents upon tensile strength was made, and we obtained the conclusive evidence at 0.01 probablity level that the regression factor can be distinguished from residual errorsBut, no relation was observed between tensile strength and iron contents of commercially pure titanium forgings.Data obtained from the above-mentioned experiment are as follows:Average of tensile strength: 39.6kg/mm2Its standard deviation: 1.56kg/mm2Average of elongation: 34.9%Its standard deviation: 4.5%Co-relation co-efficient between them: -0.43%The equation of regression line for yield (y) to tensile strength (x): y = 0.97x-8.1For elongation (y) to tensile strength (x): y = 84.9-1.26xFor oxygen contents (y) to tensile strength (x): y = 30.5x-490From the calculation for the 95 per cent confidence intervals of population average in tensile properties and chemical compositions for the forgings, the following data were obtained:For tensile strength: 39.4kg/mm2<μ<39.9kg/mm2For yield strength: 30.1kg/mm2<μ<30.7kg/mm2For elongation: 34.2%<μ<35.6%For oxygen contents: 0.069%<μ<0.075%" @default.
- W2325885061 created "2016-06-24" @default.
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- W2325885061 date "1961-01-01" @default.
- W2325885061 modified "2023-09-22" @default.
- W2325885061 title "Statistical study on the quality of the KS-50 commercially pure titanium forgings" @default.
- W2325885061 doi "https://doi.org/10.2464/jilm.11.182" @default.
- W2325885061 hasPublicationYear "1961" @default.
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