PROCEDURE FOR PRODUCTION OF REINFORCING BARS OF PERIODIC PROFILE FOR REINFORCING CONCRETE STRUCTURES Russian patent published in 2010 - IPC C21D8/08 C22C38/14 

Abstract RU 2389804 C1

FIELD: metallurgy.

SUBSTANCE: out of common low carbon steel there is melt steel containing components at following ratio wt %: carbon - 0.14-0.22, manganese - 0.40-1.10, silicon - 0.15-0.70, aluminium - 0.025-0.070, titanium -0.005-0.040, nitrogen - 0.015-0.030, iron and unavoidable impurities - the rest. At maintaining a condition - 0.29Ti+0.52Al≥N≥0.38Ti a work piece is rolled at temperature of rolled piece end 980-1050°C with production of rod. Further rod is cooled with water to average mass temperature 800-950°C. After that rod is reeled into coils and cooled in air to temperature of environment. Then rod is subject to cold shaping at ratio 12-30% and to simultaneous shaping a periodic profile. Cyclic treatment of finished product is performed by bending in one plane or in two mutually perpendicular planes with rollers of bending facilities ensuring from 1 to 5 bends of rod in plane at 10-20 ratio of diametre of rollers to diametre of finished rod; finally rod is reeled in coils.

EFFECT: facilitating highly predictable level of plastic and strength properties.

1 ex, 1 tbl

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RU 2 389 804 C1

Authors

Ivchenko Aleksandr Vasil'Evich

Rabinovich Aleksandr Vol'Fovich

Ambrazhej Maksim Jur'Evich

Bublikov Jurij Aleksandrovich

Efimov Oleg Jur'Evich

Gosteev Evgenij Aleksandrovich

Poltoratskij Leonid Mikhajlovich

Chinokalov Valerij Jakovlevich

Leboshkin Boris Mikhajlovich

Dates

2010-05-20Published

2009-06-08Filed