FIELD: rolled tube production, possibly in tube rolling plants with pilger mills.
SUBSTANCE: method comprises steps of casting hollow ingots with height 2000 - 3200 mm in electroslag refining plants; turning and boring ingots for removing scale and micro-crackings till diameter 400 -620 mm at relation of diameter to wall thickness D/S = 4.5 - 7.0 whose larger values correspond to ingot-sleeves of less diameters; rolling hollow ingot-sleeves heated till yielding temperature with relation D/S = 5.0 -7.0 and height 2000-2750 mm in pilger mill to commercial and conversion tubes with wall thickness up to 30 mm; rolling ingot-sleeves with relation D/S = 4.5 - 5.5 and height 2750 - 3200 mm in pilger mill to conversion tubes with wall thickness more than 30 mm.
EFFECT: lowered metal consumption, elimination from manufacturing process one operation of heating and piercing drilled ingots to sleeve, enhanced efficiency, increased length of conversion and commercial tubes with larger thickness of walls.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 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 | 2006 |
|
RU2311979C1 |
| METHOD FOR PRODUCING INGOT-BLANKS BY ELECTROSLAG REFINING OF HARD-TO-FORM STEELS AND ALLOYS AND FOR ROLLING OF THEM COMMERCIAL TUBES OF LARGE AND MEAN DIAMETERS IN TUBE ROLLING PLANTS WITH PILGER MILLS AND CONVERSION TUBES FOR REROLLING IN TUBE COLD ROLLING MILLS | 2006 |
|
RU2322316C2 |
| 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 |
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RU2306991C2 |
| METHOD FOR PRODUCING BY ELECTROLAG REFINING INGOT-BLANKS OF HARD-TO-FORM STEELS AND ALLOYS AND FOR ROLLING OF THEM COMMERCIAL TUBES OF LARGE AND MEAN DIAMETERS IN TUBE ROLLING PLANTS WITH PILGER MILLS AND CONVERSION TUBES FOR FURTHER REROLLING IN TUBE COLD ROLLING MILLS | 2006 |
|
RU2322317C2 |
| PRODUCTION OF 377×14-60 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS FROM ESR INGOTS OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
|
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| METHOD FOR PRODUCING HOT ROLLED COMMERCIAL AND CONVERSION TUBES OF LARGE AND MEAN DIAMETERS OF CORROSION RESISTANT HARD-TO-FORM KINDS OF STEELS AND ALLOYS IN TUBE ROLLING PLANTS WITH PILGER MILLS | 2006 |
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| PRODUCTION OF 273×9-15 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
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RU2530099C2 |
| PRODUCTION OF 325×13-15 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
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| PRODUCTION OF REROLLED LONG-SIZED PIPES FROM IRON-NICKEL- AND NICKEL-BASED ALLOYS AT PRU WITH PILGER MILLS | 2012 |
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RU2523399C1 |
| METHOD OF PREPARATION OF BILLETS FOR ROLLING OF HOT-ROLLED COMMERICAL AND REROLLED PIPES OF LARGE AND MEDIUM DIAMETERS FROM HARDLY-DEFORMED GRADES OF STEEL AND ALLOYS IN TUBE-ROLLING PLANTS WITH PILGER ROLLING MILLS | 2005 |
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RU2340417C2 |
