HOT-ROLLED HIGH-STRENGTH STEEL AND METHOD OF BAND PROCESSING FROM HOT-ROLLED HIGH-STRENGTH STEEL Russian patent published in 2008 - IPC C22C38/28 C21D8/02 

FIELD: metallurgy.

SUBSTANCE: invention concerns belts manufacturing from hot-rolled high-strength steel of bainitic-martensitic composition with content up to 5% of ferrite. In hot condition it is rolled at temperature less than 950°C slab, comprising carbon, manganese, chrome, silicon, titanium, aluminium, sulphur, phosphorus, iron and foundry admixtures, at following components ratio, mass% 0.05≤C≤0.1, 0.7≤Mn≤1.1, 0.5≤Cr≤1.0, 0.05≤Si≤0.3, 0.05≤Ti≤0.1, Al≤0.07, S≤0.03, P≤0.05, iron and foundry admixtures are the rest. Received band is cooled till temperature which is less or equal 400°C while cooling rate over 50°C/c in the range 800 - 700°C and reeled at temperature which is less or equal 250°C.

EFFECT: improving of endurance and blow resistance of hot-rolled high-strength steel.

20 cl, 1 ex