FIELD: metallurgy.
SUBSTANCE: invention relates to the method of production of seamless commercial pipes 325×16-30 mm for steam boilers, steam pipelines and headers of units with high and ultra critical steam parameters out of steel grade "10Х9МФБ-Ш". The method includes melting by the electroslag remelting of the ingots, their turning to cakes 490×100×1750±50 mm, the cakes heating to plasticity temperature, pierced by a rotary piercer to shells from 500×int.315×2550-2700 to 500×int.290×2330-2450 mm using the mandrels with diameter from 300 to 275 mm with drawing-down from µ=1.50 to µ=1.37 and rise as to diameter 1.9-2.1%, shells rotting at tube-forming installation 8-16" with Pilger mills to commercial pipes 325×16×15900-17000 - 325×30×9300-9900 mm with drawing-down from µ=7.62 to µ=4.69 and swaging as to diameter 35.0%, cutting, heat treatment, etching, straightening, ultrasound testing and acceptance with diameter tolerance +1.25/-1.0% and wall thickness tolerance +20/-5%.
EFFECT: production of seamless hot-rolled pipes with improved mechanical properties.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF FABRICATION OF SEAMLESS PIPES WITH SIZES 325×26-45 mm FOR BOILERS, STEAM LINES AND MANIFOLDS OF UNITS WITH HIGH AND SUPERCRITICAL STEAM PARAMETERS FROM "10Х9МФБ-Ш" BRAND STEEL | 2014 |
|
RU2564498C1 |
| METHOD OF PRODUCTION OF 325×16-25 mm SEAMLESS PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH CRITICAL AND SUPERCRITICAL STEAM PARAMETERS OF STEEL GRADE "10Х9МФБ-Ш" | 2014 |
|
RU2567407C1 |
| 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 |
|
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 FROM ESR INGOTS OF "10Х9МФБ-Ш"-GRADE STEEL | 2013 |
|
RU2534593C2 |
| 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 |
|
RU2523376C1 |
| PRODUCTION OF 299×10-60 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 |
|
RU2522513C1 |
| PRODUCTION OF 273×9-60 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 | 2013 |
|
RU2537413C2 |
| MANUFACTURING METHOD OF SEAMLESS PIPES WITH DIMENSIONS OF 299×10-13 mm FOR STEAM BOILERS, STEAM LINES AND HEADERS OF PLANTS WITH HIGH AND SUPERCRITICAL STEAM PARAMETERS FROM INGOTS OF ELECTROSLAG REMELTING OF STEEL GRADE "10Х9МФБ-Ш" | 2013 |
|
RU2545963C2 |
| METHOD FOR PRODUCTION OF WELDLESS DRAWN PIPES WITH SIZE OF 299×10-13 mm FOR STEAM BOILERS, PIPELINES AND HEADERS OF PLANTS WITH HIGH AND SUPERCRITICAL PARAMETERS OF STEAM FROM STEEL OF GRADE OF "10Х9МФБ-Ш" | 2013 |
|
RU2547360C2 |
| METHOD OF PRODUCTION OF 325×31-60 mm SEAMLESS PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH CRITICAL AND SUPERCRITICAL STEAM PARAMETERS OF STEEL GRADE "10Х9МФБ-Ш" | 2014 |
|
RU2570150C1 |
