The Effects of Metallurgical Factors on Fatigue Strength : Part 3, The Effects of C, Si, Mn, P and Cu (2)

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概要

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• The effects of C, Si, Mn, P and Cu in quenched and tempered low carbon steels on fatigue strength were investigated, and the results were extended to higher carbon steels. Sixteen Kinds of steels containing above alloying elements were prepared according to a statistical design. The results of tensile and fatigue tests were processed by variance analysis and multiple regression analysis methods. The conclusions are as follow. (1) The relation between fatigue limit and alloying elements can be formulated by multiple regression analysis method. (2) The relation between fatigue limit Owo and yield strength Os can be formulated as follows. Owo=0.426 Os+[\{29(P-0.066)+5.0(Cu-0.71)+16.7} (3) In the case of normalizing, the effects of C, Si, Mn, P and Cu on yield strength are more closely related to fatigue strength than to tensile strength. In the case of quenching and 650℃ tempering, however, the effects of C and Mn are more closely related to tensile strength, and those of P and Cu are to fatigue strength.

• 一般社団法人日本機械学会の論文

著者

• Nishioka Kunio

  Central Research Laboratories

• NISHIKAWA Tomio

  Central Research Laboratories, Sumitomo Metal Industries, Ltd.,

• Nishikawa Tomio

  Central Research Laboratories Sumitomo Metal Industries Ltd.

• Nishikawa Tomio

  Central Research Laboratories Sumitomo Metal Industories Ltd.

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