FIELD: metallurgy.
SUBSTANCE: proposed method comprises ESR casting, turning the casts to ingots-billets to 600xvn.240x2100±50 mm and 600xvn.200x2100±50 mm. Said ingots-billets are heated to ductility temperature, pierced in helical rolling mill at 400 and 350 mm diameter mandrels to 600xvn.415x3200-3350 mm and 600x365x2800-2950 mm sleeves with rolling-outs µ=1.56 and µ=1.37. Said sleeves are rolled to commercial pipes at PRM 8-16" with rolling-outs µ=5.52 to µ=3.04 and diameter reduction of 29.0%. Pipes ate heat treated, etched and subjected to ultrasound control and acceptance with pipe diameter tolerance of +1.25/-1.0% and wall thickness tolerance of +20/-5.0%.
EFFECT: higher pipe surface quality and Pilger mill efficiency.
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| Title | Year | Author | Number |
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RU2537639C1 |
| PRODUCTION OF 530X25-60 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 |
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| PRODUCTION OF 530×25-60 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 |
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| 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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| PRODUCTION OF 550×25-30 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 |
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| PRODUCTION OF 377×20-60 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 | 2014 |
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| 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 |
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RU2537682C2 |
