摘要
采用SWRH82B、SWRH72B及70NbV盘条研究珠光体钢丝在冷拉塑性变形条件下,其抗拉强度与真应变的关系,分析化学成分对钢丝抗拉强度的影响,探讨冷拉珠光体钢丝的强化机制。结果表明:当真应变小于2.0时,钢丝的抗拉强度随着真应变的增加呈线性增加趋势,拟合公式为σb=Aε+B;变形量较大时,材料抗拉强度受原材料化学成分和组织影响较大。本实验条件下,SWRH72B钢丝具有较大的冷拉塑性变形能力,并能获得σb=3 400 MPa的高强度。
Relationship between tensile strength and true strain of cold drawn pearlitic steel wires was studied by using SWRH82B, SWRH72B and 70NbV steel rods in this paper. The influence of chemical composition on tensile strength was analyzed and the strengthening mechanism of cold drawn plastic deformation was discussed. The results show that the relationship between tensile strength and true strain was linear when the drawing stain was less than 2.0, which could be expressed as σb =Aε ＋B. However, the tensile strength was remarkably influenced by both chemical composition and microstructure under higher true strain. According to experimental results, the best cold deformation ability of SWRH72B was obtained and the maximum tensile strength could reach 3 400 MPa.
出处
《兵器材料科学与工程》
CAS
CSCD
2009年第3期55-58,共4页
Ordnance Material Science and Engineering
关键词
珠光体钢丝
抗拉强度
真应变
强化机制
pearlitic steel wires
tensile strength
true strain
strengthening mechanism
