FIELD: metallurgy.
SUBSTANCE: pipes are produced by ESR of hollow 660×out.180-280×2100±50 mm ingots with diameter-to-wall depth ratio D/S = 2.75-3.50, its larger values being relates to hollow ingots with smaller wall depth. Sais ingots are pierced and turned to hollow 640×out.180-300×2100±50 mm ingots-billets with diameter-to-wall depth ratio D/S = 2.9-3.8, its larger values being relates to hollow ingots-billets with smaller wall depth. Said ingots-billets are heated to 1200-1220°C. Said ingots-billets are pierced-rolled at helical rolling mill to 640×out.340-440×3120-2520 mm sleeves with rolling-out µr making 1.45-1.23 and increase in diameter δ = 0 at 425, 400, 375, 350 and 325 mm diameter mandrels depending on the sleeve geometrical sizes. Said sleeves are rolled at Pilger mills with rolling-out µp equal to 4.57-2.38 to 465×25-75×11500-5000 mm pipes with total rolling-put µΣ=µrµp equal to 6.63-2.93, larger values being related to pipes with smaller wall depth, and with reduction in diameter Δ = 26.6%. Pilger heads and seed ends, processing wastes, are cut by hot cutting saws. Pipes are straightened, heat processed, etched and subjected to ultrasound control and acceptance.
EFFECT: lower metal input, higher efficiency of PRU with Pilger mills.
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| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCTION OF SEAMLESS HOT-WORKED BOILER AND STEAM LINE 530×30-75 MM PIPES FROM "10Х9К3В2МФБР-Ш " GRADE REFRACTORY STEEL FOR POWER EQUIPMENT WITH STEAM SUPERCRITICAL PARAMETERS | 2014 |
|
RU2558319C1 |
| PRODUCTION OF SEAMLESS HOT-WORKED BOILER AND STEAM LINE 465×25-75 mm PIPES FROM "10Х9К3В2МФБР-Ш"-GRADE REFRACTORY STEEL FOR POWER EQUIPMENT WITH STEAM SUPERCRITICAL PARAMETERS | 2013 |
|
RU2533613C2 |
| PRODUCTION OF SEAMLESS HOT-WORKED BOILER AND STEAM LINE 465×15-24 mm PIPES FROM "10Х9К3Б2МФБР-Ш"-GRADE REFRACTORY STEEL FOR POWER EQUIPMENT WITH STEAM SUPERCRITICAL PARAMETERS | 2012 |
|
RU2527550C2 |
| PRODUCTION OF SEAMLESS HOT-WORKED BOILER AND STEAM LINE 426×21-70, 465×25-75 AND 530×30-75 mm PIPES FROM "10Х9К3В2МФБР-Ш" GRADE REFRACTORY STEEL FOR POWER EQUIPMENT WITH STEAM SUPERCRITICAL PARAMETERS | 2012 |
|
RU2522509C2 |
| 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 |
|
RU2545925C2 |
| PRODUCTION OF 465×75 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 |
|
RU2527587C2 |
| 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 |
| MANUFACTURING METHOD OF SEAMLESS TUBES WITH SIZE OF 465×15-25 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 |
|
RU2545971C2 |
| MANUFACTURING METHOD OF SEAMLESS HOT-ROLLED TUBES ON PIPE ROLLING UNITS WITH PILGER MILLS FOR STEAM BOILERS, STEAM LINES AND HEADERS OF UNITS WITH HIGH AND SUPERCRITICAL STEAM PARAMETERS | 2013 |
|
RU2545942C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 630×28-32×4800-5500 mm FROM "15Х1М1Ф" AND "10Х9МФБ-Ш"-GRADE STEELS AT PRU 8-16" WITH PILGER MILLS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING WITH HIGHER MECHANICAL PROPERTIES | 2012 |
|
RU2530090C2 |
