High-strength impact-resistance type steel used for shelf beam and welding technology thereof

一种高强度抗冲击型货架梁用钢及其焊接工艺

Abstract

The invention discloses a high-strength impact-resistance type steel used for shelf beam, which comprises the following chemical components by weight percentage: 0.13-0.28% of C, 0.20-0.30% of Si, 0.20-0.46% of Mn, 0.85-0.95% of Cr, 0.28-0.32% of Ti, 0.16-0.22% of Mo, 0.24-0.36% of Nb, 0.05-0.07% of Cu, 0.18-0.36% of V, 0.59-0.79% of Al, 0.25-0.32% of rare earth trace element and the balance of Fe and impurity; the rare earth trace element comprises the following chemical components by mass percentage: 2-4% of Nd, 4-8% of Ce, 3-5% of Er, 2-6% of Pr, 1-4% of Pm, 0-5% of Dy, and the balance of La; the total content of impurity is less than or equal to 0.2, wherein, P is less than or equal to 0.005%, S is less than or equal to 0.007%, H is less than or equal to 0.004%, N is less than or equal to 0.006%, and O is less than or equal to 45ppm. The steel processing technology comprises the following steps: feeding, electroplating, drawing, annealing, insulating, pickling, drying and warehousing. The invention also designs a processing technology of the high-strength impact-resistance type steel used for shelf beam. The high-strength impact-resistance type steel used for shelf beam can obviously increase the wear-resistant compact-resistant capability of the steel, and has the advantages of simple operation technology, energy saving and environmental protection.
本发明公开了一种高强度抗冲击型货架梁用钢,所述钢材坯料的重量百分比化学成分为:C:0.13-0.28%,Si:0.20-0.30%,Mn:0.20-0.46%,Cr:0.85-0.95%,Ti:0.28-0.32%,Mo:0.16-0.22%,Nb:0.24-0.36%,Cu:0.05-0.07%,V:0.18-0.36%,Al:0.59-0.79%,稀土微量元素:0.25-0.32%,其余为Fe和杂质,所述稀土微量元素的化学成分质量百分含量为:Nd:2-4%,Ce:4-8%,Er:3-5%,Pr:2-6%,Pm:1-4%,Dy:0-5%,余量为La;所述杂质的总含量≤0.2%,其中,P≤0.005%,S≤0.007%,H≤0.004%,N≤0.006%,O≤45ppm;钢材加工时依次包括进料、电镀、拉拔、退火、保温、酸洗、烘干及入库工序;本发明还设计了一种高强度抗冲击型货架梁用钢的处理工艺,本发明能够显著提高货架梁用钢材的耐磨抗冲击能力,同时工艺操作简单,节能环保。

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