FIELD: technological processes; metallurgy.
SUBSTANCE: in method bottom part of electroslag remelt bars, which creates pilger head in process of pipes rolling in pilger rolling mill, is cast from plastic carbon grades of steel, and main part of bars is cast from the main grade of steel, and after rolling in pilger rolling mill pilger heads from plastic carbon steels are removed, at that height of bottom part of bars from plastic carbon steel grades is defined from the following expression Lbottom=K Lbar, where Lbar is total height of electroslag remelt bar, mm; Lbottom is height of bar bottom part from plastic carbon steel grade, mm; K=(0.15-0.20) - coefficient, high values of which are related to bars and pipes from alloyed grades of steel of larger diameter and wall thickness.
EFFECT: lower consumption of metal from alloyed and low-alloyed steel grades and melts, higher efficiency of pilger rolling mills and reduction of cost of commercial and conversion pipes of this assortment.
5 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 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 |
| 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 |
|
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|
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| 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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| 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 |
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| 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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