FIELD: metallurgy.
SUBSTANCE: method involves manufacture of ingots, their heating to ductility temperature, rolling on pilger mills into process cylindrical crude thick-walled tubes, their rerolling on cold tube rolling mills HPT 450 or HPT 250 into cylindrical tubes-workpieces of required length, heating of end sections of cylindrical tubes-workpieces in induction block to ductility temperature, namely to 1100-1200°C, upsetting-thickening of one or two ends on upsetting machine and mechanical treatment of thickened ends with their further grinding to the specified geometrical dimensions; geometrical dimensions of thickenings of ends are determined from the following equations: Sy=SBK1, Ly=DBK2, where Sy - wall thickness of upset end of tube-workpiece, mm; SB - wall thickness of tube-workpiece, mm; K1=2.0-2.5 - wall thickness growth factor of the upset end of tube-workpiece; Ly - length of the upset end of tube-workpiece, mm; DB - diametre of tube-workpiece, mm; K2=1.5-2.0 - factor for determining the length of the upset end of tube-workpiece.
EFFECT: reducing labour input and coefficient of metal consumption during fabrication of ship's shafts, and reducing their cost.
7 cl, 1 dwg, 2 tbl
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|---|---|---|---|
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|
RU2346764C2 |
| PRODUCTION OF LONG-SIZED 265×22×13000±300 AND 285×25×11750±50 mm-TUBE STOCK FROM HOLLOW ESR INGOTS-BILLETS OF "08Х10Н20Т2" AND "08Х10Н16Т2" GRATE STEEL FOR SUBMARINE PERISCOPE DRIVES | 2012 |
|
RU2527591C2 |
| PRODUCTION OF 377×14-19 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 |
|
RU2532873C2 |
| METHOD FOR MAKING ELONGATED CONVERSION LARGE- AND MEAN- DIAMETER TUBES OF CENTRIFUGALLY CAST HOLLOW BILLETS AND ELECTROSLAG REFINING INGOTS OF STEELS FOR TELESCOPIC SYSTEMS (PERISCOPES OF SUBMARINES) | 2004 |
|
RU2257271C1 |
| PRODUCTION METHOD OF SEAMLESS PIPES OF MAJOR AND MIDDLE DIAMETRES FOR STEAM BOILERS, STEAM PIPELINES AND COLLECTORS OF UNITS WITH HIGH AND OVERCRITICAL STEAM PARAMETERS | 2007 |
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RU2353446C2 |
| PRODUCTION OF 426×15-60 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 | 2013 |
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RU2545925C2 |
| MANUFACTURING METHOD OF HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT DIMENSION OF 181,8±0,4×3,5+0,3/-0,2×3750+20/-0 mm FROM STEEL GRADE "12Х12М1БФРУ-Ш" FOR FAST NEUTRON NPP REACTORS | 2013 |
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RU2545949C2 |
| MANUFACTURING METHOD OF SEMI-FINISHED HOT-ROLLED MECHANICALLY PROCESSED PIPES WITH SIZE OF 325×12 mm WITH INCREASED ACCURACY AS TO DIAMETER AND WALL FROM STEEL GRADES "12Х12М1БФРУ-Ш" AND "16Х12МВСФБР-Ш" FOR REROLLING ON "ХПТ" 450 AND "ХПТ" 250 MILLS INTO SEMI-FINISHED PIPE WORKPIECES WITH SIZE OF 202±1,2×3,5+0,3/-0,2 mm, 194±1,2×2,5+0,3/-0,2 mm AND FURTHER SHAPING INTO HEXAGONAL PIPE WORKPIECES WITH FLAT-TO-FLAT SIZE OF 181,8±0,4×3,5+0,3/-0,2×3750+20/-0 mm AND 175±0,4×2,5+0,3/-0,2×2680+20/-0 mm FOR FAST NEUTRON REACTORS OF NEW GENERATION | 2013 |
|
RU2550045C2 |
