FIELD: metallurgy.
SUBSTANCE: cast steel contains following substances, in wt %: carbon - 0.05-0.08, silicon - not over 0.03, manganese - 0.30-0.65, phosphorus - not over 0.015, sulphur - no over 0.020, aluminium - 0.015-0.050, nitrogen - not over 0.006, niobium - 0.005-0.015, ∑Cr+Ni+Cu≤0.15%, iron and unavoidable impurities making the rest. Steel is cast to slabs. The latter are to be hot rolled at initial temperature at finishing stands T6≤1000°C and finishing of 845-880°C. Strips are reeled at 510-560°C. Recrystallisation annealing is executed at 630-670°C and cured thereat for 15-28 hours. Now, temper annealing with reduction of at least 1.2% is performed.
EFFECT: higher ductility and formability.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| MANUFACTURING METHOD OF COLD-ROLLED STRIP (VERSIONS) | 2010 |
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| PRODUCTION OF COLD-ROLLED HIGH-STRENGTH STOCK FOR COLD STAMPING | 2014 |
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| METHOD OF COLD-ROLLED SHEET PRODUCTS MANUFACTURING FOR ENAMELING | 2008 |
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| COLD ROLLED STEEL PRODUCING METHOD FOR DEEP DRAWING | 2004 |
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RU2281338C2 |
| METHOD OF MAKING STEEL STRIP (VERSIONS) | 2011 |
|
RU2478729C2 |
| METHOD OF PRODUCTION OF COLD ROLLED METAL OF UPGRADED STRENGTH | 2007 |
|
RU2358025C1 |
| MANUFACTURING METHOD OF COLD-ROLLED STRIP FOR COLD BLANKING | 2012 |
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RU2479643C1 |
| MANUFACTURING METHOD OF HOT-GALVANISED ROLLED METAL OF HEAVY DUTY | 2008 |
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RU2361935C1 |
