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研究了1.0 mm厚00Cr12Ti冷轧板在再结晶退火工艺条件下力学性能的变化规律。研究结果表明,随着退火温度的升高,维氏硬度、屈服强度、抗拉强度和屈强比均呈快速下降趋势,在超过800℃之后变化不大。再结晶退火后,00Cr12Ti钢拥有较多的{111}取向的晶粒,塑性应变比值r0、r45、r90和r-在退火温度超过780℃以后都有较大升高,并且r90>r0>r45。在700~800℃之间,平面各向异性Δr值变化不大,随后Δr值随温度上升急剧升高,因而成形时易产生严重的制耳现象。通过杯突试验发现,杯突值IE与r-值的变化相一致,表明00Cr12Ti冷轧板在高温再结晶退火后,可获得良好的成形性能。
The variation of mechanical properties of 1.0 mm thick 00Cr12Ti cold rolled sheet during recrystallization annealing process was studied. The results show that with the increase of annealing temperature, the Vickers hardness, yield strength, tensile strength and yield ratio showed a rapid decline, with little change after more than 800 ℃. After recrystallization annealing, 00Cr12Ti steel has more grains with {111} orientation. The plastic strain ratios r0, r45, r90 and r- increase greatly after the annealing temperature exceeds 780 ℃, and r90> r0> r45 . At 700-800 ° C, the Δr value of the plane anisotropy did not change much, then the Δr value increased sharply with the increase of the temperature, so that the formation of ear was liable to be severe during forming. Through cup test, it was found that the cup protrusion value IE was consistent with the change of r-value, indicating that good formability can be obtained after 00Cr12Ti cold-rolled sheet recrystallization annealing at high temperature.