JPS6428344A - Roll for scale breaker - Google Patents
Roll for scale breakerInfo
- Publication number
- JPS6428344A JPS6428344A JP18345587A JP18345587A JPS6428344A JP S6428344 A JPS6428344 A JP S6428344A JP 18345587 A JP18345587 A JP 18345587A JP 18345587 A JP18345587 A JP 18345587A JP S6428344 A JPS6428344 A JP S6428344A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- depth
- resistance
- surface hardness
- decreased
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To improve wear resistance, corrosion resistance, and spalling resistance, by forming a steel in which the contents of C, Cr, Mo, and V as principal chemical components and also Co content are respectively specified into a roll shape and also specifying surface hardness and hardening depth after heat treatment. CONSTITUTION:This roll is prepared by forming a steel containing, by weight, 1.2-1.6% C, 11.0-13.0% Cr, 1.5-3.0% Mo, and 0.5-1.5% V as principal chemical components and partially containing 1.5-3.0% Co into a roll shape by means of rolling or forging, and, in this roll, surface hardness and hardening depth at a depth of 5-10mm from the surface after heat treatment are regulated to HS85-90 and >=HS84, respectively. As to the above surface hardness, wear resistance is decreased when it is <=HS85 and, when >=HS90, work hardening is liable to occur during use and spalling resistance is deteriorated. Further, as to case depth, spalling resistance is decreased when it is <=5mm and, when >=10mm, working is made difficult and toughness to bending stress and impact at the time of scale breaking is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18345587A JPS6428344A (en) | 1987-07-24 | 1987-07-24 | Roll for scale breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18345587A JPS6428344A (en) | 1987-07-24 | 1987-07-24 | Roll for scale breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6428344A true JPS6428344A (en) | 1989-01-30 |
JPH0577741B2 JPH0577741B2 (en) | 1993-10-27 |
Family
ID=16136075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18345587A Granted JPS6428344A (en) | 1987-07-24 | 1987-07-24 | Roll for scale breaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6428344A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04361822A (en) * | 1991-06-05 | 1992-12-15 | Dai Ichi High Frequency Co Ltd | Backup roll for scale breaker |
US5709807A (en) * | 1991-09-05 | 1998-01-20 | Nkk Corporation | Flow rate adjusting for rotary nozzle type molten metal pouring unit |
JP2006159269A (en) * | 2004-12-09 | 2006-06-22 | Dai Ichi High Frequency Co Ltd | Roll for scale breaker, its production method, and quenching device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5747849A (en) * | 1980-09-04 | 1982-03-18 | Kobe Steel Ltd | Work roll for cold rolling |
JPS5864357A (en) * | 1981-10-14 | 1983-04-16 | Kubota Ltd | Wear resistant alloy for hot conveying roll |
JPS59145763A (en) * | 1983-02-10 | 1984-08-21 | Nippon Koshuha Kogyo Kk | Alloy tool steel |
JPS59179762A (en) * | 1983-03-30 | 1984-10-12 | Daido Steel Co Ltd | Cold tool steel |
JPS6223966A (en) * | 1986-06-06 | 1987-01-31 | Kubota Ltd | Wear resistant alloy for hot conveying roll |
-
1987
- 1987-07-24 JP JP18345587A patent/JPS6428344A/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5747849A (en) * | 1980-09-04 | 1982-03-18 | Kobe Steel Ltd | Work roll for cold rolling |
JPS5864357A (en) * | 1981-10-14 | 1983-04-16 | Kubota Ltd | Wear resistant alloy for hot conveying roll |
JPS59145763A (en) * | 1983-02-10 | 1984-08-21 | Nippon Koshuha Kogyo Kk | Alloy tool steel |
JPS59179762A (en) * | 1983-03-30 | 1984-10-12 | Daido Steel Co Ltd | Cold tool steel |
JPS6223966A (en) * | 1986-06-06 | 1987-01-31 | Kubota Ltd | Wear resistant alloy for hot conveying roll |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04361822A (en) * | 1991-06-05 | 1992-12-15 | Dai Ichi High Frequency Co Ltd | Backup roll for scale breaker |
US5709807A (en) * | 1991-09-05 | 1998-01-20 | Nkk Corporation | Flow rate adjusting for rotary nozzle type molten metal pouring unit |
JP2006159269A (en) * | 2004-12-09 | 2006-06-22 | Dai Ichi High Frequency Co Ltd | Roll for scale breaker, its production method, and quenching device |
Also Published As
Publication number | Publication date |
---|---|
JPH0577741B2 (en) | 1993-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |