40MnB合金钢硼含量的控制  

Control of Boron Content in Alloy Steel 40MnB

作　　者：郑桂芸 翟正龙 戈文英 张伟 

机构地区：[1]莱芜钢铁股份有限公司,莱芜271104

出　　处：《特殊钢》2008年第5期45-46,共2页Special Steel

摘　　要：莱钢特钢厂用50 t电弧炉-LF(VD)工艺生产40MnB钢。结果表明,通过保持LF精炼渣的渣碱度3.0～5.5,喂Al线,并在LF精炼末期喂硅钙线,扒渣后50 Pa VD处理35～40 min,VD后喂Al线,再喂钛线,用铝皮包裹FeB_(20)C_(0.5)-A硼铁插入钢水中,软吹氩,硼铁中硼的回收率为65%～75%,钢中硼含量为0.001 8%～0.002 5%,钢中氧含量≤20×10^(-6),氮含量≤80×10^(-6)。The steel 40MnB is produced by 50 t EAF-LF （VD） process at Special Steel Plant, Laiwu Steel. Results showed that with insuring refining slag basicity 3.0 - 5.5, feeding Al wire, then feeding silicon-calcium wire in LF refining end phase, skimming and 50 Pa VD treated for 35 -40 min, after VD feeding Al wire and titanium wire, and inserting ferroboron FeB20C0.5-A cladding of aluminium sheet into liquid steel and soft argon blowing, the yield of boron of ferroboron was 65% - 75% , boron content in steel was 0. 001 8% - 0. 002 5% , and oxygen content and nitrogen content in steel were respectively ≤420 ×10^-6 and ≤480 ×10^-6

关 键 词：40MnB钢 EAF-LF(VD) 硼含量控制 

分 类 号：TG142.33[一般工业技术—材料科学与工程]