低碳冷轧搪瓷钢DC01EK研发及抗鳞爆性能研究

Development and Research on Fishing Scaling Resistance of Low Carbon Cold Rolled Enamel Steel DC01EK

通过安钢1780 mm热连轧-1550 mm冷轧生产线研发了1.8 mm的低碳冷轧搪瓷钢DC01EK(/%:C≤0.06,Si≤0.03,Mn:0.15~0.25,P≤0.015,S:0.010~0.020,Alt:0.020~0.040,B:0.0010~0.0020)和抗鳞爆性能研究。热轧采用直接热装工艺,终轧温度890℃,卷取温度720℃,控制BN、MnS和Fe_(3)C第二相粒子析出,以提高抗鳞爆性能,采用810℃退火温度,提高了低碳冷轧搪瓷钢DC01EK的冲压性能。结果表明:低碳冷轧搪瓷钢DC01EK屈服强度在208~239 MPa,抗拉强度在333~348 MPa,伸长率>36%,其金相组织为铁素体和珠光体,能够满足冲压成形要求。并通过氢渗透试验,研究了硼元素及第二相粒子对低碳冷轧搪瓷钢抗鳞爆性能影响。

Low-carbon cold-rolled fishing scaling resistance enamel steel DC01 EK(/%:C≤0.06,Si≤0.03,Mn:0.15-0.25,P≤0.015,S:0.010-0.020,Alt:0.020-0.040,B:0.0010-0.0020)1.8 mm sheet is developed by angang 1780 mm hot continuous rolling-1550 mm cold rolling production line.With direct hot charging hot rolling process,final rolling at 890℃,and coiling at 720℃,the precipitation of the second phase particles of BN,MNS and Fe_(3)C is controlled to improve fishing scaling resistance of steel.The annealing temperature 810℃is adopted to improve the stamping performance of low-carbon cold-rolled enamel steel DC01 EK.The results show that of low-carbon cold-rolled enamel steel DC01 EK the yield strength is 208-239 MPa,the tensile strength is 333-348 MPa,and the elongation>36%.Its metallographic structure is ferrite and pearlite,which can meet the requirements of stamping forming.The effects of boron and second phase particles on the phosphorus explosion resistance of low carbon cold rolled enamel steel are studied by hydrogen permeation test.