鑄鋼材熔製法に關する考察(補遺)

概要

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Generally, mechanical properties of cast steel are not equal in every case, according to their melting conditions. For examples, steels of the almost same chemical compositions have not equal mechanical properties in evesy case, especially in their elongation. These causes are studied from the melting conditions, and we gained following conclusions.(1) When the melting is abnormal, mechanical properties of the cast steel are abnormal, too.(2) Si content affect especially to the elongation.(3) Non-metallic inclusions may be the greatest factor affecting these properties. Shock test is carried out, too, and we reached to the same conclusions. As for the non-metallic inclusions, it is reported that Si content of 0.3∿0.4% is the best condition for decreasing them. And our result agree well, too. When the melting is not normal, and Si content is low, Si should be added to the standard (Si=0.3∿0.4%). This method is tested and proved satisfactory. At last, our melting operation is compared for many other foundry operations and proved not inferior to them.
社団法人日本鉄鋼協会の論文
1951-04-25