Roll surface layer material for hot rolling with excellent fatigue resistance produced by centrifugal casting, and composite roll for hot rolling produced through centrifugal casting
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United States of America Patent
Stats
-
May 22, 2018
Issued Date -
N/A
app pub date -
Oct 15, 2012
filing date -
Oct 19, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is provided a roll surface layer material including a roll surface layer with excellent fatigue resistance. The roll surface layer material has a composition including, on a mass % basis, C: 2.3% to 2.9%, Si: 0.2% to 0.8%, Mn: 0.2% to 1.0%, Cr: 5.0% to 7.5%, Mo: 4.4% to 6.5%, V: 5.3% to 7.0%, Nb: 0.6% to 1.5%, and Co: 0.1% to 4.0% so as to satisfy 14.0≤(Mo+1.7V)≤17.0 (where Mo represents a content (mass %) of Mo and V represents a content (mass %) of V) and further including Al: 0.001% to 0.03% and/or REM: 0.001% to 0.03%, wherein a carbide is contained at an area fraction of 13% to 40%. A composite roll obtained by integrally welding a shaft member to the roll surface layer member is treated as a centrifugal cast roll that includes a surface layer with excellent fatigue resistance.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- B22D Class
- 363 Applications Filed
- 293 Patents Issued To-Date
- 80.72 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- B22D Class
- 54.85 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Nov 22, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 22, 2029 |
