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制御圧延した厚板のセパレーションにおよぼすバンド組織の影響

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.13 (1981) No.1

制御圧延した厚板のセパレーションにおよぼすバンド組織の影響

Effect if Bended Structures on Separations in Controlled Rolled Steel Plates 岡部 龍二(Ryuji Okabe) 榎並 禎一(Teiichi Enami) 森 徳明(Tokuaki Mori) 要旨 : 化学成分および制御圧延条件を変えた厚板を用いて,セパレーションの発生と伝播におよ ぼすパーライトおよび/またはベイナイトバンド組織密度の影響および {100} 集合組織の 影響を研究した。バンド組織密度および(100)強度の増加とともにセパレーション長さは 増加した。セパレーションはバンド組織で発生し,バンド組織に沿って選択的に伝播した。 クラックの発生挙動に関しては,(1) セパレーションが主クラックに先行して発生 (2) セ パレーションと主クラックが同時に発生 (3)主クラックが発生し,セパレーションがこれ に続く場合の三つび型式が観察された。 Synopsis :

Using controlled rollled steels with different chemical compositions, effect of pearlitic and/or bainitic banded structures and intensity of {100} texture on the initiation and propagation of separetions were investigated. Separation increased in length with the increase of banded structure density and (100) intensity.Separations initiated at banded structure and propagated preferably along them. As for the initiation behavior of crack, three types were observed: (i) separation preceded the formation of main crack, (ii) main crack and separation oc-curred simultaneously and (iii) main crack initiated, followed by separation.

(c)JFE Steel Corporation, 2003

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