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采用不同含碳量的热处理后镀铜钢丝,主要研究了珠光体钢丝在冷拉拔变形过程中的抗拉强度与真应变的关系,并探讨了珠光体钢丝的加工硬化行为。结果表明:当真应变小于2.12时,钢丝的抗拉强度随着真应变的增加呈线性增加趋势。珠光体钢丝的加工硬化过程分为三个阶段:真应变ε<1.5时,材料加工硬化率随真应变的增加而下降,加工硬化指数较低;1.5≤ε≤4.0时,加工硬化率随真应变的增加而增加,加工硬化指数快速升高;真应变ε>4.0后,加工硬化率急剧下降,加工硬化指数呈抛物线下降。
Using different carbon content after heat treatment of copper wire, the pearlite steel wire in the process of cold drawing deformation of the relationship between the tensile strength and true strain, and pearlite steel work hardening behavior. The results show that when the true strain is less than 2.12, the tensile strength of steel wire increases linearly with the increase of true strain. The work hardening process of pearlite wire is divided into three stages: the true strain ε <1.5, the work hardening rate of the material decreases with the increase of the true strain, the work hardening index is low; 1.5≤ε≤4.0, the work hardening rate with the true The strain increases and the work hardening index increases rapidly. After the true strain ε> 4.0, the work hardening rate drops sharply, and the work hardening index shows a parabolic decline.