Title:
TITANIUM PIPE-FORMING ROLL, TITANIUM PIPE-FORMING APPARATUS, AND TITANIUM PIPE-MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/047795
Kind Code:
A1
Abstract:
A titanium pipe-forming roll provided with a base material having, in mass%, C:1.00-2.30%, Si: 0.10-0.60%, Mn: 0.20-0.80%, P: 0.030 or less, S: 0.030% or less, Cr: 4.80-13.00% with the balance being iron and unavoidable impurities, a nitride layer (800-1200 Hv) on said base material (600-700 Hv), a CrN film (800-2000 Hv), and a DLC film, wherein: in said DLC film, Vickers hardness is 3000-3500 in the region from the film surface to 0.20t (wherein t is the film thickness), and is 1500-3000 in the region from the interface with said CrN film to 0.20t; the ratio I1380/I1540 of absorption intensities at wave number 1380 cm-1 and 1540 cm-1 measured by Raman spectroscopy is 0.5-0.7 in the region from the film surface to 0.20t and is 0.3-0.5 in the region from the interface between the DLC film and the CrN film to 0.20t. Said titanium pipe-forming roll has excellent adhesion resistance, abrasion resistance, peeling resistance and roll surface friction coefficient.
Inventors:
ITAMI YOSHIAKI (JP)
Application Number:
PCT/JP2016/077561
Publication Date:
March 23, 2017
Filing Date:
September 16, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C23C28/04; B21B27/02; C22C37/06; C22C38/00; C22C38/18; C22C38/24; C23C8/38; C23C16/27
Foreign References:
| JP2001239308A | 2001-09-04 | |||
| JP2005161431A | 2005-06-23 | |||
| JP2006144848A | 2006-06-08 | |||
| JP2004269991A | 2004-09-30 | |||
| JP2012097821A | 2012-05-24 | |||
| JPH02160102A | 1990-06-20 |
Other References:
SHIGEO HOSHINO: "NP Series Katai Hyomen -Tsukurikata to Hyokaho", MAKI SHOTEN, 30 September 1998 (1998-09-30), pages 167, 169
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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