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本文研究了含0.11％C的低碳双相钢拉伸试样颈缩区孔洞的分布状态及断裂特征,测定了横截面上孔洞密度及其平均直径随断口下距离的变化。结果表明,淬火及回火对孔洞分布及断裂过程有明显影响,为说明低碳双相钢拉伸性能随热处理规范而变化的规律[9]提供了论据。
In this paper, the distribution and fracture characteristics of the neck of a low-carbon dual-phase steel with 0.11% C tensile specimen were investigated. The density of the cross-section and the change of its average diameter with the distance under the fracture were measured. The results show that the quenching and tempering have a significant effect on the distribution of holes and the fracture process. This provides evidence for the variation of the tensile properties of low-carbon dual-phase steels with the heat treatment specifications [9].