低碳铝镇静钢中AlN的沉淀析出.pdf

21 6 V ol . 2 1, No . 6 2009 6 J our nal of Ir on and Steel Research June 2009 AlN 1 2 3 刘阳春, 傅 杰 , 吴华杰 ( 1. , 100041; 2 . , 1000 83; 3. , 100083 : AlN , A lN , , , A lN A lN , AlN : AlN ; ; : T G1421 : A : 1001-0963( 2009 06- 0020- 04 Precipitation of Aluminum Nitride in Low Carbon Aluminum-Killed Steel 1 2 3 L IU Y ang- chun , F U Jie , WU H ua- jie ( 1. Sho ug ang T echno lo gy Resear ch Institute, Beij ing 100041, China; 2 . Schoo l of M et allur gical and Ecolog ical Engineer ing , U niversit y of Science and T echno log y Beij ing , Beij ing 1000 83, China; 3 . M etallur gical Engineer ing Research Inst itute, U niver sity o f Science and T echnolog y Beijing , Beijing 100083, China Abstract:T he precipit ation of aluminum nitr ide in low carbon aluminum- killed steels pro duced by T SCR is st udied by means of heat t reatment and chemical phase analysis . T he r esult s show that only a small quantity o f nit rog en is chang ed into aluminum nit ride in lo w car bo n alum inum- killed st eel produced by T SCR , and the gr eat mass of ni- tro gen in steel is still f ree nitro gen . A luminum nitride is ma inly pr ecipitated during the perio d o f slo w air co oling after co iling the hot r olled sheet , but not pr ecipitated during the period of co ntinuou s casting befo re enter ing t he furnace, symmetr ical heating in t he furnace, hot r olling and w ater coo ling . T he aluminum nitr ide cant r ef ine t he g rain of steel . Key words: alum