微合金高碳盘条生产预应力镀锌钢丝研究

发布时间：2018-07-11 13:00

本文选题：盘条 + 拉拔　；参考：《热加工工艺》2017年24期

【摘要】：以SWRH82BCr和B82Mn QL盘条作为热镀锌的试验材料,利用拉伸试验机、反复弯曲试验机对其力学性能进行了测试,借助金相显微镜、扫描电镜分析了几种工艺下的横截面和轴向截面以及拉拔断口的组织形貌,测试了显微硬度。结果表明:在冶炼时加入Cr等合金元素可明显改变盘条在后续加工中的性能,SWRH82BCr拉拔后抗拉强度由原来的1250 MPa提高至1676 MPa,B82Mn QL拉拔钢丝抗拉强度由原来的1192 MPa提高至1670 MPa。采用新工艺和助镀配方,钢丝镀锌后SWRH82BCr抗拉强度下降幅度为1.5%,B82Mn QL抗拉强度下降幅度为1%,均低于传统的8%。稳定化后,SWRH82BCr镀锌钢丝的平均抗拉强度为1727 MPa,反复弯曲为5次,扭转次数为13次;B82Mn QL镀锌钢丝的平均抗拉强度为1710 MPa,反复弯曲为5次,扭转次数为21次。稳定化后,硬度较镀锌的明显提高且其分布均匀。通过优化工艺,可提高SWRH82BCr和B82Mn QL盘条的抗拉强度。
[Abstract]:The mechanical properties of SWRH82BCr and B82MnQL wire rod were tested by means of tensile tester and repeated bending tester, and metallographic microscope was used to test the mechanical properties of SWRH82BCr and B82MnQL wire rod. Scanning electron microscopy (SEM) was used to analyze the microstructure of cross and axial cross sections and drawing fracture surface of different processes, and the microhardness was tested. The results show that the tensile strength of SWRH82BCr after drawing can be increased from 1250 MPA to 1676 MPA from 1192 MPA to 1670 MPA. By using the new process and the assisted plating formula, the tensile strength of SWRH82BCr decreased by 1.5% B82mn QL after galvanized with steel wire, which was lower than that of the traditional steel wire (8B 82mn QL). The average tensile strength of stabilized SWRH82BCr galvanized steel wire is 1727 MPa, 5 times of repeated bending, 13 times of torsion of B82Mn QL galvanized steel wire, 1710 MPA of average tensile strength, 5 times of repeated bending and 21 times of torsion. After stabilization, the hardness is obviously higher than that of zinc plating and its distribution is uniform. The tensile strength of SWRH82BCr and B82MnQL wire rod can be improved by optimizing the process.
【作者单位】：九江学院;
【基金】：九江学院校级科研项目(2013ZD07,2014KJYB018) 江西省教育厅科技落地计划项目(KJLD14091) 江西省科技计划项目(20133BBE50031) 江西省“卓越工程师教育培养计划”实施成果项目(赣财教2011[244]号)
【分类号】：TG356.45

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