FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling, particularly, to methods of producing seamless large-diameter tubes by repiercing mill. Proposed method comprises piercing of heated billet into shell at screw rolling mill, rolling said shell at repiercing mill, burnishing of rough tube and gauging its at lengthwise rolling mill. Note here that billet piercing into shell is carried out at screw rolling mill in two passes with shell diameter-to-wall thickness ratio approximating to 30.
EFFECT: high-quality large-diameter thin-wall tubes.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF TUBE PRODUCTION | 0 |
|
SU839631A1 |
| METHOD OF HOT-ROLLED PIPE PRODUCTION | 2012 |
|
RU2489221C1 |
| METHOD OF PRODUCTION OF SEAMLESS HOT-ROLLED LARGE- AND MEDIUM-DIAMETER PIPES FROM STEEL AND ALLOYS AT PIPE ROLLING PLANTS WITH PILGRIM MILLS FROM TUBULAR BLANKS | 2012 |
|
RU2502570C1 |
| METHOD OF SEAMLESS TUBE PRODUCTION | 2011 |
|
RU2455092C1 |
| METHOD FOR MAKING HOT-DEFORMED SEAMLESS LARGE-DIAMETER TUBES | 2003 |
|
RU2243837C1 |
| METHOD OF SEAMLESS PIPE PRODUCTION AT THE AGGREGATE WITH SCREW PIERCING MACHINES AND CONTINUOUS LENGTHWISE ROLLING | 2010 |
|
RU2441722C1 |
| SCREW FITTING METHOD | 2021 |
|
RU2773967C1 |
| METHOD OF FABRICATION OF SEAMLESS HOT-ROLLED PIPES 530(17-60, 550(25-60, 610(32-50 AND 630(32-60 MM OUT OF FORGED, CONTINUOUSLY CAST BILLETS, INGOTS AND HOLLOW INGOTS OF ELECTROSLAG REMELTING PROCESS AT PIPE-ROLLING UNIT 8-16" WITH PILGER MILLS OF JSC CHTPZ | 2013 |
|
RU2550035C2 |
| TUBE-MANUFACTURING METHOD | 0 |
|
SU647024A1 |
| TUBE-FORMING INSTALLATION FOR ROLLING SEAMLESS HOT-DEFORMED TUBES OF LARGE AND MEAN DIAMETRES | 2008 |
|
RU2387496C2 |
