UA69065C2 - Methods of manufacture of the mandrels - Google Patents
Methods of manufacture of the mandrelsInfo
- Publication number
- UA69065C2 UA69065C2 UA20031210844A UA20031210844A UA69065C2 UA 69065 C2 UA69065 C2 UA 69065C2 UA 20031210844 A UA20031210844 A UA 20031210844A UA 20031210844 A UA20031210844 A UA 20031210844A UA 69065 C2 UA69065 C2 UA 69065C2
- Authority
- UA
- Ukraine
- Prior art keywords
- rod
- rolling
- pass
- mandrels
- manufacture
- Prior art date
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Invention relates to the tube-rolling production, in particular, to the methods of manufacture of the mandrels for continuous tube mills. Method includes the multipass rolling of rod, its straightening, mechanical treatment along the length, heating, multipass running-in with hardening during the first pass. At rolling of rod the temperature of the metal prior to final pass does not exceed the value ACç +- 20 DEGREE C,and its relative reduction in this pass makes not less than 15 %, after rolling the tempering of rod is carried out, and at running-in after hardening in the first pass high-temperature tempering is accomplished due to internal heat of rod and further cooling at a speed not less than 450 ?C/min. Invention provides an increase of the depth of hardened layer of mandrel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UA20031210844A UA69065C2 (en) | 2003-12-01 | 2003-12-01 | Methods of manufacture of the mandrels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UA20031210844A UA69065C2 (en) | 2003-12-01 | 2003-12-01 | Methods of manufacture of the mandrels |
Publications (2)
Publication Number | Publication Date |
---|---|
UA69065A UA69065A (en) | 2004-08-16 |
UA69065C2 true UA69065C2 (en) | 2006-03-15 |
Family
ID=34512430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
UA20031210844A UA69065C2 (en) | 2003-12-01 | 2003-12-01 | Methods of manufacture of the mandrels |
Country Status (1)
Country | Link |
---|---|
UA (1) | UA69065C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2531077C2 (en) * | 2012-06-21 | 2014-10-20 | Открытое Акционерное Общество "Дефорт" | Production of mandrels for pipe rolling mills |
RU2600044C1 (en) * | 2015-04-01 | 2016-10-20 | Общество с ограниченной ответственностью "Дефорт" | Method for making mandrels for a tube-rolling mill |
-
2003
- 2003-12-01 UA UA20031210844A patent/UA69065C2/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2531077C2 (en) * | 2012-06-21 | 2014-10-20 | Открытое Акционерное Общество "Дефорт" | Production of mandrels for pipe rolling mills |
RU2600044C1 (en) * | 2015-04-01 | 2016-10-20 | Общество с ограниченной ответственностью "Дефорт" | Method for making mandrels for a tube-rolling mill |
Also Published As
Publication number | Publication date |
---|---|
UA69065A (en) | 2004-08-16 |
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