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叶片钢1Cr12Ni2Mo2VN电极坯母材(/%:0.10C,0.24Si,0.81Mn,0.013P,0.002S,11.75Cr,2.63Ni,1.70Mo,0.32V,0.033N)的生产流程为30 t EAF-VOD-LF-2.67 t铸锭-退火-Φ250 mm锻坯。通过将ANF-6二元渣改成高纯度、低杂质NEU_D06预熔四元渣,平均熔速由5.27 kg/min降低至3.5~4.0 kg/min等工艺措施,成功地生产出Φ430mm叶片钢1Cr12Ni2Mo2VN电渣锭(/%:0.10~0.12C,0.75~0.86Mn,0.21~0.24Si,0.011~0.014P,0.000 1S,11.76~11.82Cr,2.54~2.61Ni,1.63~1.71Mo,0.31~0.32V,0.039N)。检验结果表明,电渣锭的组织为马氏体+0.5%~1.5%8-铁素体,非金属夹杂物总和为1.5~2.0级,[0]15×10~(-6)~17×10~(-6),[H]1.24×10~(-6)~1.47×10~(-6),保证了电渣钢的质量。
The leaf steel 1Cr12Ni2Mo2VN electrode base material (/%: 0.10C, 0.24Si, 0.81Mn, 0.013P, 0.002S, 11.75Cr, 2.63Ni, 1.70Mo, 0.32V, 0.033N) was produced by a 30 t EAF-VOD -LF-2.67 t ingot - annealed - Φ250 mm forging. By changing ANF-6 binary slag into high-purity, low-impurity NEU_D06 pre-melted quaternary slag and decreasing the average melt velocity from 5.27 kg / min to 3.5-4.0 kg / min, the Φ430mm leaf steel 1Cr12Ni2Mo2VN Electroslag ingots (/%0.10~0.12C, 0.75~0.86Mn, 0.21~0.24Si, 0.011~0.014P, 0.0001S, 11.76~11.82Cr, 2.54~2.61Ni, 1.63~1.71Mo, 0.31~0.32V, 0.039N). The test results show that the microstructure of the electroslag ingot is martensite + 0.5% -1.5% 8-ferrite, and the sum of nonmetallic inclusions is 1.5-2.0 [0] 15 × 10 -6 -6 × 17 10 -6 and H 1.24 × 10 -6 ~ 1.47 × 10 -6, which ensure the quality of ESR steel.