FIELD: metallurgy.
SUBSTANCE: blanks with size 630×100×1360 mm are heated to plasticity temperature. They are pierced in helical rolling mill to shell-blanks with size 650×ID340×1660 mm and are heated to the plasticity temperature. The shell-blanks are pierced-rolled in helical rolling mill to shells with size 660×ID515×2900 mm at the mandrel with diameter 500 mm and drawing µ2 n=1.75 and rise as to diameter δ=1.54%. Shells are rolled in Pilger mill in gauge 548 mm, cut in rolls with barrel diameter 1150 mm, in semi-finished pipes with size 538×30×7100 mm with polishing coefficient Kn=7.5, reduction ratio µr=2.77 and with diameter reduction Δ=21.2%. The semi-finished pipes are cut to pipes having multiple length 4300 and 2800. Pipes are bored and turned to commercial pipe-blanks with size ID489+3.0/-0×19.5+3.0/-0×4090+40/-0 and ID489+3.0/-0×19.5+3.0/-0×2500+40/-30 mm.
EFFECT: reduced metal consumption.
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| Title | Year | Author | Number |
|---|---|---|---|
| ROLLER OF HELICAL ROLLING MILL | 2013 |
|
RU2554246C1 |
| PRODUCTION OF SEAMLESS HOT-WORKED MACHINED PIPES WITH SIZE 530(16 MM WITH INCREASED ACCURACY OUT OF STEEL GRADE "08X18H10T" FOR NUCLEAR POWER ENGINEERING STRUCTURES | 2013 |
|
RU2554250C1 |
| PRODUCTION OF "вн.279×36 (351×36)" AND "вн. 346×40" (426×40) mm PIPES FOR NUCLEAR POWER STATIONS FROM "10ГН2МФА" AND "08Х18Н10Т" GRADE STEELS WITH 7 mm INNER CLAD PLY | 2013 |
|
RU2542129C2 |
| METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530×13-17 MM SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE | 2016 |
|
RU2615400C1 |
| METHOD OF PRODUCTION OF SEAMLESS MACHINED PIPES WITH SIZE OF 610×28-32 mm FROM STEEL OF 08Cr18N10T-S GRADE | 2017 |
|
RU2638263C1 |
| METHOD OF MANUFACTURING OF PIPES "T=279(36" AND "T=346(40" MM OUT OF "08-18=10T-+" GRADE STEEL FOR NUCLEAR POWER FACILITIES | 2013 |
|
RU2542139C1 |
| METHOD OF PRODUCTION OF SEAMLESS MACHINED PIPES WITH SIZE OF 610×15-20 mm FROM STEEL TO 08Cr18N10T-S GRADE | 2017 |
|
RU2638264C1 |
| METHOD OF PRODUCTION OF SEAMLESS MACHINED PIPES WITH SIZE OF 610×21-27 mm FROM STEEL OF 08Cr18N10T-S GRADE | 2017 |
|
RU2638265C1 |
| METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 610X10-14 MM SIZE FROM STEEL OF "08Х18Н10Т-Ш" GRADE | 2016 |
|
RU2617080C1 |
| PRODUCTION OF SEAMLESS HOT-ROLLED MACHINED 610×36,53 mm PIPES OF 15X5M GRADE STEEL FOR COMMUNICATIONS OF REFINERIES | 2013 |
|
RU2545948C2 |
