FIELD: metallurgy.
SUBSTANCE: method includes slab heating, rolling on broad-strip mill of strip of thickness 8-10 mm of trumpet grades of steels with increased up to 0.50-0.70% content of chrome microalloyed by niobium, with content of carbon 0.07-0.12%, its cooling with following winding into the reel. Steel microstructure with ferrite grain no more than 9 point is provided ensured by rolling in finishing train is implemented with reduction of cross-sectional area no less than 80% at finishing temperature in the range of 845-870°C, after what it is implemented differentiate surface cooling of strip by water on collecting roller table with following winding of strip into reels at the temperature in the range 515-555°C.
EFFECT: receiving of production with required optimum microstructure, defined activities of cold resisting property, plasticity, viscosity and durability.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCTION OF HOT-ROLLED PIPE STEEL ROLLS | 2007 |
|
RU2350413C1 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL COILS | 2008 |
|
RU2360748C1 |
| MANUFACTURING METHOD OF HOT-ROLLED TUBE STEEL COILS | 2008 |
|
RU2373003C1 |
| HOT ROLLING METHOD OF LOW ALLOY STEEL IN CONTINUOUS WIDE STRIP ROLLING MILL WITH TWO GROUPS OF COILERS | 2005 |
|
RU2312720C2 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL ROLLS | 2007 |
|
RU2350411C2 |
| METHOD OF PRODUCING HOT-ROLLED TUBE STEEL ROLLS | 2010 |
|
RU2430799C1 |
| HOT ROLLED STEEL COILS PRODUCING METHOD | 2004 |
|
RU2268793C1 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL | 2011 |
|
RU2440425C1 |
| METHOD OF PRODUCING TUBE STEEL HOT-ROLLED COILS | 2008 |
|
RU2393933C1 |
| HOT ROLLED FLAT PIECE PRODUCTION METHOD | 2005 |
|
RU2289485C1 |
