这种新辊型对低塑性钢穿孔质量的改善和实现大前进角强化穿孔过程都有很大意义。
This new roll shape is very effective for improving pierced quality of low plastic steel and intensifying piercing process with larger cross angle.
在应变疲劳曲线上，弹性线和塑性线的交点随弹簧钢回火后硬度的升高而向低循环寿命移动；
The point of intersection of elastic line and plastic line moves toward the low cycle life with the hardness of the spring steel raised after tempering from the strain fatigue curve.
针对热轧带钢因卷取后钢卷内外圈与芯部的冷却速度不同，导致带钢成品头尾强度高、塑性低的问题，提出了卷取温度凹型控制模式。
U-shaped control model for coiling temperature was put forward to improve the high strength and low plasticity of head and tail of hot rolled strip.
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