Si对缆索钢丝绳用热轧盘条组织和力学性能的影响
The Influence of Si on Microstructure and Mechanical Properties of Hot-Rolled Wire Rods for Cable Steel Wire Ropes
李建平 1唐正友 1张翰文 1邓通武2
作者信息
- 1. 东北大学材料科学与工程学院,沈阳 110006
- 2. 攀钢集团研究院有限公司,攀枝花 617000
- 折叠
摘要
利用扫描电镜和能谱(EBSD)仪器对两种不同Si含量的热轧盘条的横截面和纵截面的组织形貌进行观测,并用万能试验机测试热轧盘条的拉伸性能,结果表明:随着Si含量的增加,珠光体转变的过冷度增加,热轧盘条的珠光体团尺寸和珠光体片间距减小.Si元素使Mn元素在渗碳体中偏聚,增加了渗碳体的稳定性,减小了渗碳体片层的球化倾向.Si元素使盘条横、纵截面珠光体的织构强度减弱,珠光体组织更加均匀,取向更加随机.Si元素能大幅度提升热轧盘条和成品钢丝的强度,小幅度提升塑性.低Si盘条的抗拉强度为1 134 MPa,均匀伸长率为7.1％;高Si盘条的抗拉强度为1 263 MPa,均匀伸长率为7.3％.低Si钢丝的抗拉强度为1 937 MPa,均匀伸长率为2.2％;高Si钢丝的抗拉强度为2 106 MPa,均匀伸长率为2.3％.
Abstract
The cross section and longitudinal section microstructure morphology of two different Si contents hot-rolled wire rods were observed using scanning electron microscopy and energy spectrum(EBSD)instruments.The tensile properties of the hot-rolled wire rods were tested using a universal testing machine.The results show that with the increase of Si con-tent,the undercooling of pearlite transformation increases,and the size of pearlite colony and pearlite interlamellar spac-ing in hot-rolled wire rods decrease.The Si element causes the Mn element to segregate in the cementite,increasing its sta-bility and reducing the spheroidization of the cementite lamellae.The Si element weakens the texture strength of the pearl-ite in the transverse and longitudinal sections of the wire rod,leading the pearlite structure more uniform and the orienta-tion more random.The Si element can greatly improve the strength of hot-rolled wire rods and finished steel wires,while slightly improving plasticity.The tensile strength of low Si wire rod is 1 134 MPa,and the uniform elongation is 7.1％;The tensile strength of high Si wire rod is 1 263 MPa,and the uniform elongation is 7.3％.The tensile strength of the low Si wire is 1 937 MPa,and the uniform elongation is 2.2％;The tensile strength of the high Si wire is 2 106 MPa,and the uniform elongation is 2.3％.
关键词
缆索钢丝绳/热轧盘条/Si元素/珠光体/组织性能Key words
Cable Steel Wire Rope/Hot-Rolled Wire Rod/Si Element/Pearlite/Microstructure and Mechanical Properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据