FIELD: technological processes.
SUBSTANCE: invention relates to pipe rolling. Hollow bars of electroslag melting are turned and ground into hollow blooms with size of 500×vn.320×3200±50 mm. Blooms are heated to temperature 1180-1200°C and rolled on a TPU 8-16" pilger mills into pig pipes with size of 325×15×21500-22300 with drawing m=7.78, clamping by diameter 36.2% and with supply of hollow blooms into a deformation site m=15-18 mm. Technical wastes are cut - seed ends and pilger heads of hot cutting. Pipes are cut, straightened on a six-roll melting machine, thermally processed. Acceptance is carried out with allowance by diameter of +1.25/-1.0 and wall thickness of ±12.5%. Pig pipes with size of 325×15×7170-7430 mm are rolled on a cold-pilgering mill 450 into commercial cold-rolled pipes with size of 299×10×11100-11500, 299×11×10150-10500, 299×12×9300-9600 and 299×13×8600-8900 mm with drawing of accordingly m=1.61, m=1.47, m=1.35 and m=1.25.
EFFECT: reduced discharge coefficient of metal.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 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 OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
|
RU2522512C1 |
| 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 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 |
| 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 |
| 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 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 |
|
RU2537682C2 |
| 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 |
| 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 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 |
| 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 |
