FIELD: metallurgy, in particular, working out of thermally and mechanically reinforced steels for ferroconcrete constructions of various strength classes.
SUBSTANCE: reinforced steel for ferroconcrete constructions of At400 to At1200 strength classes contains, wt%: carbon 0.08-0.32; silicon 0.4-2.4; manganese 0.5-2.3; aluminum 0.02-0.07; titanium 0.01-0.1; nitrogen 0.006-0.03; vanadium 0.01-0.12; niobium 0.005-0.02; copper no more than 0.3; nickel no more than 0.3; chromium no more than 0.30; phosphor no more than 0.03; sulfur no more than 0.03; iron the balance. Carbon equivalent is defined from formula: Ceq=C+Si/6+Mn/7+(Ti+V+Nb)/5+(Cu+Ni+Cr)/15 and is equal to 0.35-0.56 for At400, At500 class steel, or 0.44-0.70 for At600, At800 class steel, or at least 0.67 for At1000, At1200 class steel. Steel of such composition may be used for manufacture of thermally and mechanically reinforced bars of 12-32 mm diameter.
EFFECT: improved welding capability, high mechanical properties and increased resistance from corrosion cracking.
2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| HIGH-STRENGTH LOW-TEMPERATURE WELDED REINFORCING ROD | 2021 |
|
RU2774692C1 |
| METHOD OF PRODUCING THICK-WALL PIPE STEEL | 2015 |
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| ROLLED STOCK FOR CASING AND TUBING PIPES AND METHOD OF ITS PRODUCTION | 2020 |
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| PROCEDURE FOR PRODUCTION OF STRIP FOR PIPES OF MAINS | 2008 |
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| MANUFACTURING METHOD OF HIGH-STRENGTH STRIP FOR PIPES OF MAIN PIPELINES | 2011 |
|
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| METHOD OF HOT ROLLED SHEETS MANUFACTURING FROM K60 DURABILITY CLASS LOW-ALLOYED STEEL WITH THE THICKNESS OF UP TO 40 mm | 2018 |
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| METHOD OF CANDIES PRODUCTION | 2007 |
|
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| HOT-ROLLED SHEET OF LOW-ALLOY STEEL WITH THICKNESS FROM 15 TO 165 mm AND METHOD OF ITS PRODUCTION | 2016 |
|
RU2638479C1 |
| METHOD FOR PRODUCING SHEETS WITH THICKNESS OF 2-20 mm OF HIGH-STRENGTH WEAR-RESISTANT STEEL (OPTIONS) | 2020 |
|
RU2765047C1 |
| HIGH-STRENGTH WELDED REBAR | 2012 |
|
RU2478727C1 |
