| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.12 ( July 1985 ) Special Issue on Hot-and Cold-rolled Steel Sheets ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Production of Hot Rolled Steel Sheet for High Strength Steel Pipes with Good Cold Formability Nobuo Aoyagi, Hiroaki Ueno, Masatoshi Shinozaki, Minoru Nishida, Isao Takahashi |
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Synopsis : High strength steel sheet for high strength steel pipe which is used for automobiles, motorcycles and various structures has been developed. The high strength steel pipe has been practically used for frames and handlepipes of motorcycles in place of Cr-Mo steel seamless pipe. Characteristics of the newly developed steel sheet and steel pipe are as follows: (1) The steel is a low C and Ti bearing steel. (2) Hardening due to electrical resistance welding of pipe is little because of low C content, and the pipe shows good machinability and excellent formability without heat treatment for softening. (3) Mechanical strength and fatigue properties of the pipe are also better than those of STKS1C (Cr-Mo steel seamless pipe). (4) The pipe is less expensive than conventional high strength pipe, because heat treatment is not necessary and alloy content is low. This leads to higher productivity at the users of this pipe. |
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