FIELD: tube production, namely method for making cold rolled large- and mean-diameter tubes of high accuracy of titanium base alloys from conversion welded blank.
SUBSTANCE: method comprises steps of forming sheet blank in roll mill to conversion tube blank for rolling large diameter tubs; welding lengthwise edges of blank in argon protective atmosphere by means of consumable electrode of the same kind of alloy; subjecting conversion straight -seam tube to heat treatment and deforming it on mandrel in round roll grooved passes. Conversion straight seam tube is rolled to large diameter tube at elongation degree no less than 1.4 and at reduction degree of its no less than 20%. Invention provides possibility for producing tubes with improved accuracy of wall thickness at keeping mechanical properties corresponding to ASTM B 862-02 from welded conversion tube blank made for rolling maximum-diameter tubes instead of seamless conversion tube blanks, to decrease titanium alloy consumption factor by 2.25 - 2.5 times.
EFFECT: reduced production cost of tubes of titanium base alloys with improved accuracy of their wall thickness.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| COLD ROLLED TITANIUM-ALLOY LARGE- AND MEAN-DIAMETER HIGH-ACCURACY TUBES PRODUCTION METHOD | 2004 |
|
RU2294247C2 |
| METHOD FOR PRODUCING COLD-ROLLED LARGE- AND MEAN- DIAMETER TUBES OF TITANIUM BASE ALLOYS | 2004 |
|
RU2288053C2 |
| METHOD FOR PRODUCING CONVERSION TUBE BLANK FOR ROLLING COLD ROLLED TUBES OF LARGE- AND MEAN-DIAMETERS OF TITANIUM BASE ALLOYS | 2004 |
|
RU2288052C2 |
| METHOD FOR PRODUCING CONVERSION STRAIGHT-SEAM TUBE BLANK FROM TITANIUM BASE ALLOYS FOR ROLLING COLD ROLLED LARGE AND MEAN DIAMETER TUBES WITH IMPROVED ACCURACY OF WALL GEOMETRY | 2005 |
|
RU2297896C2 |
| METHOD FOR PRODUCTION OF COLD-ROLLED PIPES OF LARGE AND MEDIUM DIAMETRES OF HARDLY-DEFORMED GRADES OF STEELS AND ALLOYS WITH HIGH ACCURACY BY WALL | 2007 |
|
RU2386503C2 |
| METHOD FOR PRODUCING CONVERSION TUBE BLANK FOR ROLLING COLD ROLLED LARGE- AND MEAN-DIAMETER TUBES OF TITANIUM BASE ALLOYS | 2004 |
|
RU2288054C2 |
| FABRICATION METHOD OF COLD-ROLLED PIPES OF LARGE AND MEAN DIAMETRES FROM DIFFICULT-TO-FORM GRADES OF STEEL AND ALLOYS WITH INCREASED WALL ACCURACY | 2008 |
|
RU2387502C2 |
| METHOD FOR PRODUCTION OF CONVERSION TUBULAR BILLET FOR ROLLING OF COLD-ROLLED PIPES OF LARGE AND MEDIUM DIAMETRES OF HARDLY-DEFORMED GRADES OF STEELS AND ALLOYS | 2007 |
|
RU2386493C2 |
| PRODUCTION OF BILLETS WITH OUTER AND INNER PLATING PLIES FROM CORROSION-RESISTANT STEELS AND ALLOYS FOR PRODUCTION OF SEAMLESS THREE-LAYER HOT- AND COLD-ROLLED COMMERCIAL AND REROLLED LONGER-LIFE PIPES FOR GAS AND GAS CONDENSATE EXTRACTION IN HYDROGEN SULPHIDE-BEARING MEDIA, ITS TRANSPORTATION AND GENERAL PURPOSE PIPES | 2013 |
|
RU2535151C2 |
| METHOD OF PRODUCTION OF 426×15-30 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH CRITICAL AND SUPERCRITICAL STEAM PARAMETERS OF STEEL GRADE "10Х9МФБ-Ш" | 2013 |
|
RU2567427C2 |
