FIELD: process engineering.
SUBSTANCE: invention aims at increasing quality of hot-rolled sheets from K60 strength tube steel for making large-diameter tubes for main pipelines. Proposed method comprises hot rolling at specified operating conditions. Producing hot-rolled stock from micro-alloyed selected chemical composition of the 25-27 mm-thick tubes with identical mechanical properties over sheet cross-section is allowed by controlling temperatures of hot roughing at 1110-970°C, finishing of 830±20°C, hot rolling of 820±15°C, as well as sheet accelerated cooling temperature of 615±15°C, and sheet cooling rate after finishing of 16-20°C/sec.
EFFECT: higher efficiency.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MANUFACTURING METHOD OF PLATES FROM LOW-ALLOY PIPE STEEL WITH STRENGTH CLASS K60 | 2011 |
|
RU2465344C1 |
| MANUFACTURING METHOD OF PLATES FROM LOW-ALLOY PIPE STEEL WITH STRENGTH CLASS K60 | 2012 |
|
RU2479639C1 |
| METHOD OF MAKING SHEETS FROM LOW-ALLOY PIPE STEEL | 2011 |
|
RU2458753C1 |
| METHOD OF PRODUCING LOW-ALLOY K52-K60-GRADE PIPE STEEL | 2011 |
|
RU2458751C1 |
| MANUFACTURING METHOD OF PLATES FROM LOW-ALLOY PIPE STEEL WITH STRENGTH CLASS K60 | 2012 |
|
RU2479638C1 |
| MANUFACTURING METHOD OF PLATES FROM LOW-ALLOY PIPE STEEL WITH STRENGTH CLASS K60 | 2011 |
|
RU2465345C1 |
| METHOD MAKING SHEETS FROM LOW-ALLOY PIPE STEEL | 2011 |
|
RU2458752C1 |
| METHOD OF PRODUCING SHEETS FROM LOW-ALLOYED TUBE STEEL OF X60 STRENGTH GRADE | 2011 |
|
RU2458156C1 |
| METHOD OF PRODUCING LOW-ALLOY X70-GRADE PIPE STEEL | 2011 |
|
RU2458754C1 |
| MANUFACTURING METHOD OF PLATES FROM LOW-ALLOY PIPE STEEL WITH STRENGTH CLASS K56 | 2011 |
|
RU2465343C1 |
