塑性と加工
Online ISSN : 1882-0166
Print ISSN : 0038-1586
論文
摩擦圧接されたテーラードビレットを用いた
強度分布を有する部品の型鍛造
前野 智美森 謙一郎柳谷 雄一松井 康純工藤 正昭木村 新
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ジャーナル フリー

52 巻 (2011) 608 号 p. 1022-1026

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Parts having a strength distribution were produced from tailor friction-welded billets consisting steel bars having different quenchabilities. JIS-SCr420 having high quenchability and JIS-S25C having low quenchability were joined by frictional welding. The tailor friction-welded billet was then forged, and the forged billet was quenched to induce a strength distribution. The formability of the tailored billet was examined from compression tests in compression in directions normal and parallel to the interface. For the 80% compressed tailored billets, no cracks were observed. In a tensile test of a specimen cut from the 80% compressed tailored billet in the parallel direction, the fracture occurred on the JIS-S25C side having a low flow stress, not at the interface. By annealing the tailored billet, inhomogeneous deformation around the interface was prevented. A shaft having a high strength flange and a connecting rod having high strength and machinability were produced by forging and quenching the tailored billet.

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© 2011 一般社団法人 日本塑性加工学会
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