Journal of the Japan Society for Technology of Plasticity
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
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Smooth Hole Piercing of Ultrahigh-strength Steel Sheets by Means of Press-shaving
Akira HARAI, Manabu SUZUKI, Akira MATSUMOTO, Fumitoshi KOMURO, Tomio SHIONOME, Nobuhiro KOGA, Masao MURAKAWA
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Keywords: ultrahigh-hardness steel sheet, hole piercing, press hole shaving, smooth cut edge.
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2016 Volume 57 Issue 663 Pages 366-368

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Abstract
Quenched and tempered (Q&T) steel sheets (JIS SK85) having an ultrahigh-hardness value of 55HRC [or an equivalent tensile strength (TS) value of about 1800 MPa] were pierced using a rounded tip edge punch and a sharp-edge die, and then subjected to a second press-shaving process that resulted in a press-shaved product with a substantially smooth and dimensionally precise cut edge.
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© 2016 The Japan Society for Technology of Plasticity
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