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本文在实验室试制了高强度冷轧热镀锌用双相钢,探讨了不同的退火温度和平整工艺对双相钢力学性能和组织的影响规律。研究表明:退火温度在800℃以上时,试制的低硅C-Mn-Cr系双相钢才能得到由铁素体和马氏体组成的性能优良的双相钢。平整工艺显著提高双相钢的屈服强度和屈强比,降低双相钢的延伸率,平整率小于1%时,有利于工业上得到综合性能良好的双相钢。
In this paper, high strength cold-rolled hot-dip galvanized dual-phase steels were trial-produced in the laboratory. The effects of different annealing temperature and the formation process on the mechanical properties and microstructure of the dual-phase steels were discussed. The results show that when the annealing temperature is above 800 ℃, the low-silicon C-Mn-Cr dual phase steel can be obtained as dual phase steel with excellent properties of ferrite and martensite. The formation process significantly improves the yield strength and yield ratio of dual-phase steel and reduces the elongation of dual-phase steel. When the formation rate is less than 1%, it is advantageous to obtain dual-phase steel with good overall performance in industry.