ROLL IN HOT-DIP METAL PLATING BATH AND METHOD FOR PRODUCING ROLL IN HOT-DIP METAL PLATING BATH

WIPO Patent Application WO/2019/111843

A1

[Problem] To prevent steel sheet defects caused by a roll in a bath while achieving stable sheet passage at high speed and improving plated steel sheet producibility. [Solution] A roll in a hot-dip metal plating bath has: vertical grooves comprising two first curved surfaces, which are formed along the circumferential direction of the roll and protrude toward the outside of the roll, and at least one second curved surface, which is disposed between the two first curved surfaces and protrudes toward the inside of the roll; and transverse grooves formed along the longitudinal direction of the roll body on the outer circumferential surface of the roll. The pitch P1 (mm) and depth d1 (mm) of the vertical grooves satisfy 1.0≤P1≤10, 0.2≤d1≤5, and d1≤P1/2. Depth d2 (mm) is 60% to 150% of the depth d1 of the vertical grooves. The width w2 (mm) of the transverse grooves is at least two times the depth d2 or at least two times the radius of curvature (mm) of the curved surface of the bottom of the transverse grooves and not more than 0.7 times the pitch P2 (mm). The pitch P2 (mm) of the transverse grooves is 1.0≤P2≤10.

KURISU YASUSHI (JP)
KONNAI HAYATO (JP)
NISHIMURA FUTOSHI (JP)
UCHIDA SATOSHI (JP)
MIGITA ATSUSHI (JP)
MISHIMA YUUKI (JP)

PCT/JP2018/044351

June 13, 2019

December 03, 2018

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NIPPON STEEL CORP (JP)
NIPPON STEEL & SUMIKIN HARDFACING CO LTD (JP)

C23C2/00; C23C2/40

JPH05339689A	1993-12-21
JP2000248345A	2000-09-12
JPH0874017A	1996-03-19
JP2004091831A	2004-03-25
CN104294198A	2015-01-21

KAMEYA, Yoshiaki (JP)

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