FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling. Proposed method comprises heating of ESR ingots-billets sized to 660×ID 270×3200±50 mm at continuous furnace to 1170-1180°C, rolling at PRU 8-16" with Pilger rerolled pipe billets sized to 620×ID 250×3470-3570 mm at rolls of 630 mm pass at 249/250 mm diameter mandrels with diameter reduction Δ=6.1% and rolling-out µ=1.1. Cold- or hot-charged pipe billets are heated in continuous furnace to 1180-1200°C and rolled to 426×90×7800-8100 mm pies at 237/238 mm diameter mandrels with diameter reduction Δ=30.6% and rolling-out µ=2.49.
EFFECT: lower specific metal input, length of commercial pipes increased by 28.0%.
2 cl, 1 tbl
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| 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 |
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| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 610×28-32×4700-5400 mm FROM "15Х1М1Ф"- AND "10Х9МФБ"-GRADE STEELS AT PRU 8-16'' WITH PILGER MILLS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING WITH HIGHER MECHANICAL PROPERTIES | 2012 |
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