关键词: 3 t和6 t保护气氛电渣重熔锭, 1Cr21Ni5Ti钢, 渣系, 工艺参数, 钛烧损

Abstract: The effect of argon flow rate (15~45 L/min) , triple slag (/% ： 63CaF₂ , 27Al₂O₃, 10CaO), quaternary slag (/% : 53CaF₂, 22Al₂O₃, 20CaO, 5MgO) and pentary slag (/%： 50CaF₂,22Al₂O₃,20CaO, 5MgO, 3TiO₂) , and adding Al powder in ESR process on [Ti] in 3 t shielding atmosphere remelting ingot of steel 1Cr21Ni5Ti [/%：0. 09 ~ 0. 14C, ≤0. 80Mn, ≤0.80Si, ≤0. 025S, ≤0. 035P, 4. 8 ~5. 8Ni, 20~22Cr, 5x(C-0.02) ~0.65Ti] has been tested by commercial production. Results show that with increasing argon flow rate, using pentary slag series and evenly adding Al powder in remelting process, the average loss of titanium content- △ [Ti] in remelting ingot could be ≤0. 15%. With using optimized process, filling ratio 0.58, current 12 500 ~ 13 500 A, voltage 40-43 V, pentary slag series, and argon flow rate 30 L/min the results for steel 1Cr21Ni5Ti remelting by 6 t shielding atmosphere ESR unit show that element content in ESR ingot is constant, the C content in ingot is 0.090% -0.091% and Ti content in ingot is 0.46%-0.52% .