铁铬铝合金电渣重熔锭内裂纹的分析和工艺改进措施  

Analysis on Internal Cracks in Fe-Cr-Al Alloy Electroslag Remelting Ingot and Improved Process Measure

作　　者：白李国[1] 李京社[1] 杨树峰[1] 李刚[1,2] 杨宏博 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京首钢吉安泰新材料有限公司,北京102200

出　　处：《特殊钢》2014年第1期40-42,共3页Special Steel

基　　金：国家自然科学基金资助(51304016)

摘　　要：通过工业试验研究了铁铬铝合金(/%:0.024C,0.26Si,0.17Mn,20.1Cr,5.3Al,0.05RE)200 kg电渣重熔结晶器的结构、冷却强度、电压电流、缓冷方式等对内裂纹的影响。结果表明,通过将原结晶器底水箱改为间接水冷装置,提高进水量,将电流、电压分别由原来的5 400 A和55 V降至5 000 A和50 V以降低熔池温度,采用膨胀珍珠岩覆盖剂保温均热等措施,使电渣锭低倍组织致密均匀,无内裂纹。The effect of structure of electroslag remehing （ESR） mold, cooling intensity, voltage, current and slow- cooling method on internal cracks of 200 kg ESR ingot of Fe-Cr-A1 alloy （/% ： 0. 024C, 0. 26Si, 0. 17Mn, 20. ICr, 5.3A1, 0. 05RE） has been studied by pilot-scale production. Results show that with the measures including modifying orig- inal mold bottom water box to indirect water cooling unit, increasing inlet water rate, decreasing voltage and current respec- tively from original 5 400 A and 55 V to 5 000 A and 50 V to lower bath temperature, and using expanding perlite shielding material for holding and soaking, the macrostructure of ESR ingot is compact and uniform, and there is no internal cracks.

关 键 词：铁铬铝合金 电渣重熔 内裂纹 工艺措施 

分 类 号：TF14[冶金工程—冶金物理化学]