FIELD: rolled tube production, namely processes for piercing ingots and billets for making seamless hot-deformed large-diameter tubes.
SUBSTANCE: method comprises steps of heating ingots and billets until yielding temperature; piercing them to hollow thick-wall sleeves in first skew rolling mill for further expanding to thin-wall sleeves in second skew rolling mill and rolling to large-diameter tubes in plants provided with automatic or pilger mills; piercing ingots and billets to thick-wall sleeves in first piercing mill with working rolls driven to rotation in one side and expanding billets to thin-wall sleeves in second piercing mill with working rolls driven to rotation in opposite side.
EFFECT: enhanced geometry of tubes, lowered metal consumption, improved efficiency of tube rolling plants.
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| Title | Year | Author | Number |
|---|---|---|---|
| FABRICATION METHOD OF SEAMLESS HOT-DEFORMED TUBES OF LARGE AND MEAN DIAMETRES FROM DIFFICULT-TO-FORM GRADES OF STEEL AND ALLOYS ON TUBE-FORMING INSTALLATION WITH PILGER MILLS | 2008 |
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RU2387497C2 |
| FABRICATION METHOD OF SEAMLESS HOT-DEFORMED TUBES OF LARGE AND MEAN DIAMETRES ON TUBE-FORMING INSTALLATIONS WITH PILGER MILLS | 2008 |
|
RU2387498C2 |
| TUBE-FORMING INSTALLATION FOR ROLLING SEAMLESS HOT-DEFORMED TUBES OF LARGE AND MEAN DIAMETRES | 2008 |
|
RU2387496C2 |
| METHOD OF PRODUCING SEAMLESS HOT-DEFORMED LARGE- AND MEDIUM-DIAMETRE PIPES AT PIPE ROLLING UNITS WITH STEP-ROLLED MILLS | 2008 |
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| METHOD FOR MAKING HOT DEFORMED AND CONVERSION MEAN- AND LARGE-DIAMETER TUBES OF CORROSION RESISTANT HARD-TO-FORM STEELS AND ALLOYS IN TUBE ROLLING AGGREGATE WITH PILGER MILLS | 2003 |
|
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| PRODUCTION OF SEAMLESS HOT-WORKED MACHINED 610×36,53×3550±50 mm PIPES FROM "15Х5М"-GRADE STEEL FOR REFINERY COMMUNICATIONS WITH STRINGENT REQUIREMENTS TO GEOMETRICAL SIZES | 2013 |
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| METHOD OF FABRICATION OF SEAMLESS HOT-ROLLED MACHINED PIPES WITH EXTENDED PRECISION SIZE 530(16 MM FROM STEEL GRADE "08X18H10T" FOR NUCLEAR POWER FACILITIES | 2013 |
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RU2553729C1 |
| FABRICATION METHOD OF SEAMLESS HOT-DEFORMED MECHANICALLY TREATED TUBES WITH DIAMETRE OF 530-550 mm FROM CORROSION-RESISTANT DIFFICULT-TO-FORM GRADES OF STEEL AND ALLOYS ON TUBE-FORMING INSTALLATION 8-16" WITH PILGER MILLS | 2007 |
|
RU2387501C2 |
| 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 |
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RU2550035C2 |
| METHOD FOR PRODUCING HOT ROLLED COMMERCIAL AND CONVERSION TUBES OF LARGE- AND MEAN-DIAMETERS OF HARD-TO-FORM STEELS AND ALLOYS IN TUBE ROLLING PLANTS WITH PILGER MILLS | 2005 |
|
RU2306991C2 |
