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出 处:《特殊钢》2010年第5期49-50,共2页Special Steel
摘 要:开发的模具钢718(%:0.32~0.40C、0.30~0.50Si、1.00~1.50Mn、≤0.016P、≤0.005S、1.50~2.00Cr、0.40~0.50Mo、0.80~1.20Ni、0.020~0.045Al)198~308 mm厚板的生产工艺流程为90~100 t EAF-LFVD-40 t电渣重熔(950 mm×2 000 mm板坯)-轧制(控冷)-热处理。检验结果表明,钢中的P为0.009%~0.012%,S为0.001%~0.003%,钢中气体含量为(45~60)×10^(-6)[N],1.5×10^(-6)[H],(13~18)×10^(-6)[O];钢板平均HB值为317~352,其组织为回火贝氏体+少量回火索氏体,满足各类模具的加工和表面质量要求。The production process flow sheet for 198 - 308 mm heavy plate of developed die steel 718 (%:0.32~0.40C、0.30~0.50Si、1.00-1.50Mn、≤0.016P、≤0.005S、1.50-2.00Cr、0.40~0.50Mo、0.80~1.20Ni、0.020~0.045Al)is 90 -100 t EAF-LF-VD-40 t ESR (950 mm ×2000 mm slah)-rolling (control cooling ) -heat treat- ment. Examination results show that the P content in steel is 0. 009% -0. 012%, the S content is 0. 001% -0. 003%, and the gases contents are (45 - 60) × 10^ -6 [ N ], 1.5× 10^ -6 [ H ] and ( 13 - 18 ) × 10^ -6 [ O ] ; the average value of HB hardness is 317 - 352 with structure of tempered bainite + minor tempered sorbite to meet the requirement of workability and surface quality for various dies.
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