FIELD: process engineering.
SUBSTANCE: proposed invention relates to rolling wide hot-rolled strips, primarily from tube steel grades of X65 hardness grade. Method comprises smelting, casting to produce crystallised slab, slab hot rolling to produce strip at wide-strip mill stand with strip surface water cooling and coiling it into roll. To reach required mechanical properties, tube lean-alloyed steel slab (content of steel components in wt % making: carbon - 0.08-0.11; silicon - 0.25-0.40; manganese - 1.45-1.60; chromium - 0.10-0.20; nickel - 0.10-0.20; titanium - 0.10-0.025; niobium - 0.015-0.035, and vanadium - 0.07-0.09) is rolled at wide-strip mill stand at rolling end differentiated temperature of 770÷825°C into 6-16 mm-thick strip. Prior to coiling, hot-rolled strip is water cooled. Note here that cooling rate of coiled strip depends upon final thickness of strip and obeys claimed mathematical expression.
EFFECT: higher efficiency of rolling.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING TUBE STEEL HOT-ROLLED COILS | 2008 |
|
RU2393933C1 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL ROLLS | 2007 |
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| METHOD TO PRODUCE HOT-ROLLED COILS FROM TUBE STEELS | 2008 |
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| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL | 2011 |
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RU2440425C1 |
| METHOD OF PRODUCTION OF HOT-ROLLED PIPE STEEL ROLLS | 2007 |
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RU2350413C1 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL COILS | 2008 |
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RU2365439C2 |
| METHOD FOR PRODUCTION OF HOT SEMI-FINISHED ROLLED PRODUCTS ON CONTINUOUS BROAD-STRIP ROLLING MILL WITH TWO GROUPS OF REELS | 2006 |
|
RU2343018C2 |
| HOT ROLLED TUBE STEEL COILS PRODUCTION METHOD | 2004 |
|
RU2277445C1 |
| MANUFACTURING METHOD OF HOT-ROLLED PIPE STEEL ROLLER | 2008 |
|
RU2356658C1 |
