JPS555107A - Manufacture of reducing roll - Google Patents
Manufacture of reducing rollInfo
- Publication number
- JPS555107A JPS555107A JP7532878A JP7532878A JPS555107A JP S555107 A JPS555107 A JP S555107A JP 7532878 A JP7532878 A JP 7532878A JP 7532878 A JP7532878 A JP 7532878A JP S555107 A JPS555107 A JP S555107A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- roll
- journal
- grain size
- forging
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Forging (AREA)
Abstract
PURPOSE:To fine the grain size of the drum, and to manufacture the reducing roll of excellent fatigue strength, by setting the forging ratio for the roll journal more largely than the forging ratio for the drum, and also, by setting the forging ratio for the drum itself at a small value, in case of manufacutring the reducing roll by the forging method. CONSTITUTION:The steel ingot, being cast by the electroslag remelting method, is heated to 1200 deg.C, and the roll journal is forged into diameter 300mm by the forging ratio larger than 2.5. Next, the ingot is heated to 850 deg.C, and the drum is forged into diameter 440mm; hereby, the reducing roll is manufactured. Hereupon, the forging ratio for the drum is set smaller than 1.5. After the specified heat treatment is finished on this roll, it is served for the reducing roll. Since the finish forging for the drum is executed under a low temperature, after the journal is forged as stated above, the grain size of the journal is prevented from coarsening, and also, the grain size of the drum becomes fine. Depending on this fining of the grain size, the reducing roll of excellent fatigue strength can be easily manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7532878A JPS555107A (en) | 1978-06-23 | 1978-06-23 | Manufacture of reducing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7532878A JPS555107A (en) | 1978-06-23 | 1978-06-23 | Manufacture of reducing roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS555107A true JPS555107A (en) | 1980-01-16 |
| JPS613575B2 JPS613575B2 (en) | 1986-02-03 |
Family
ID=13573073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7532878A Granted JPS555107A (en) | 1978-06-23 | 1978-06-23 | Manufacture of reducing roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS555107A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5029453A (en) * | 1973-07-13 | 1975-03-25 | ||
| JPS52122248A (en) * | 1976-04-08 | 1977-10-14 | Kanto Special Steel Works Ltd | Roll having shaft portion of high tenacity |
-
1978
- 1978-06-23 JP JP7532878A patent/JPS555107A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5029453A (en) * | 1973-07-13 | 1975-03-25 | ||
| JPS52122248A (en) * | 1976-04-08 | 1977-10-14 | Kanto Special Steel Works Ltd | Roll having shaft portion of high tenacity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS613575B2 (en) | 1986-02-03 |
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