| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.11 ( March 1985 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Properties of Microalloyed Medium Carbon Steel Satoru Takahashi, Hideyuki Yuzawa, Naomasa Murai, Yoshihiko Inoue, Tadashi Morii, Masanori Minagawa |
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Synopsis : To develop microalloyed carbon steel bars for machine parts, the effects of microalloying elements and the hot working conditions on the strength and toughness of medium carbon steel were investigated. The results obtained are as follows: (1) Because of the effects of V or Nb for precipitation hardening and crystal grain refinement, addition of V and/or Nb is effective for producing microalloyed carbon steel bars. (2) Strength, hardness and toughness are controlled by the heating temperature and the cooling rate from Ar3 to Ar1. (3) The chemical component design should be based on the manufacturing conditions and required properties of each part. (4) This steel is suitable to the connecting rod, crank shaft, pin, shaft and so on. |
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