摘要
研究了传统电渣和电磁电渣对GCr15轴承钢成分偏析及凝固组织的影响,同时分析了不同电渣工艺对铸锭凝固过程传热的影响。电磁电渣工艺条件下,当搅拌电流强度为150 A、频率为6 Hz时,铸锭碳偏析指数为0.98~1.02;铸锭心部珠光体片层间距为213.6 nm,靠近铸锭心部位置过冷度为37.54℃。研究结果表明:电磁电渣可有效减轻GCr15铸锭的宏观偏析,改善钢锭凝固组织和传热条件,渣—金反应加强,钢液纯净度进一步提高。
The effects of traditional electroslag and electromagnetic electroslag on the composition segregation and solidification structure of GCr15 bearing steel were studied,and the effects of different electroslag processes on the heat transfer in the solidification process of ingot were analyzed.Under the condition of electromagnetic electroslag process,when the stirring current intensity is 150 A and the frequency is 6 Hz,the carbon segregation index of ingot is 0.98~1.02,the pearlite lamellae spacing in the ingot center is 213.6 nm,and the super-cooling near the ingot center is 37.54℃.The results show that the electromagnetic electroslag can effectively reduce the macro-segregation of GCr15 ingot,improve the solidification structure and heat transfer conditions of ingot,strengthen the slag-gold reaction,and further improve the purity of molten steel.
作者
张晓峰
张福利
王卓
徐于斌
牟瑞宇
王育飞
Zhang Xiaofeng;Zhang Fuli;Wang Zhuo;Xu Yubin;Mu Ruiyu;Wang Yufei(HBIS Group Research Institute,Shijiazhuang,Hebei,050023)
出处
《河北冶金》
2019年第11期26-30,共5页
Hebei Metallurgy
关键词
GCR15
电磁电渣
凝固组织
珠光体
珠光体片层间距
过冷度
GCr15
electromagnetic electroslag
solidification structure
pearlite
pearlite lamellar spacing
supercooling
