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冷拉加工是冷拉扁钢生产的核心工序。将经过热处理的钢材放置在冷拉机上,通过模具将其拉伸成所需的扁钢尺寸。冷拉过程中,钢材的截面逐渐减小,长度增加,这一过程同时也提高了材料的强度和硬度。冷拉过程中的温度较低,通常低于材料的再结晶温度,从而避免了高温对材料力学性质的不利影响。
a3冷拉扁钢是什么材质:
材质 | 碳C | 锰Mn | 硅Si | 硫S | 磷P |
Q235冷拉扁钢 | ≤0.22% | 0.3%-0.65% | ≤0.35% | ≤0.05% | ≤0.045 |
Q235B级冷拉扁钢 | ≤0.22% | 0.3%-0.75% | ≤0.35% | ≤0.45% | ≤0.045% |
Q235C级冷拉扁钢 | ≤0.18% | 0.35%-0.80% | ≤0.040% | ≤0.040% | ≤0.30% |
Q235C级冷拉扁钢 | ≤0.17% | 0.35%-0.80% | ≤0.035% | ≤0.035% | ≤0.30% |