氩气流量、渣系和加Al粉对1Cr21Ni5Ti钢保护气氛重熔锭[Ti]的影响

生产试验了氩气流量（15~45 L/min）,三元（/%:63CaF₂,27Al₂O₃,10CaO）、四元（/%:53CaF₂,22Al₂O₃,20CaO,5MgO）和五元（/%:50CaF₂,22Al₂O₃,20CaO,5MgO,3TiO₂）渣系和重熔过程加Al粉对3 t保护气氛重熔1Cr21Ni5Ti钢锭/%:0.09~0.14C，≤0.80Mn，≤0.80Si，≤0.025S，≤0.035P，4.8~5.8Ni，20~22Cr，5×（C-0.02~ 0.65Ti]中Ti]的影响。结果表明,增加氩气流量,采用五元渣系和重熔过程均匀加入Al粉可使重熔锭平均钛的烧损△Ti]≤0.15%。采用优化工艺在6 t保护气氛电渣炉,填充比0.58,电流12 500~13 500 A,电压40~43 V,,氩气流量30 L/min,重熔1Cr21Ni5Ti钢的结果表明,电渣锭成分稳定,C含量0.090%~0.091%;Ti含量0.46%~0.52%。 

Effect of Argon Flow Rate,Slag Series and Adding Aluminium on [Ti] of Shielding Atmosphere ESR Ingot of Steel 1Cr21Ni5Ti

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% .