合金元素对高碳珠光体盘条钢组织和性能的影响  

Effect of alloying elements on microstructure and properties of high carbon pearlite wire rod steel

作　　者：唐恩 彭侠超 刘红亮 张瑞 王坤[1] Tang En;Peng Xiachao;Liu Hongliang;Zhang Rui;Wang Kun(Zhejiang Industry&Trade Vocational College,Wenzhou Zhejiang 325000,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou Gansu 730000,China;Natural Steel Group Co.,Ltd.,Wenzhou Zhejiang 325000,China)

机构地区：[1]浙江工贸职业技术学院,浙江温州325000 [2]兰州理工大学材料科学与工程学院,甘肃兰州730000 [3]大自然钢业集团有限公司,浙江温州325000

出　　处：《金属热处理》2024年第4期42-47,共6页Heat Treatment of Metals

基　　金：浙江工贸引进人才项目(YJRC202206)。

摘　　要：设计了3种不同微合金元素V、Nb含量的高碳钢盘条钢,通过拉伸性能测试、组织观察、母相奥氏体晶粒尺寸统计等分析了微合金元素对盘条钢的强化作用。结果表明,V钢的抗拉强度为1282.7 MPa,总延伸率为13.08%,相比于基础钢强度增加约156.5 MPa,总延伸率略有提高。V+高Nb钢的抗拉强度为1287.0 MPa,总延伸率为12.38%,相比于基础钢强度增加约160.8 MPa,总延伸率提高0.25%。对于高碳珠光体钢,添加适量V可以起到细化珠光体片层间距的作用,但是继续添加Nb并不会进一步细化珠光体片层间距,对于抗拉强度的提升无显著作用,因此加入0.1%V后无需再加Nb。微合金元素V的添加除了细化母相奥氏体晶粒,还提升了盘条钢的加工硬化能力,主要是由于珠光体片层间距得到细化,终端盘条钢成品表现出较好抗变形能力。Three kinds of high carbon wire rod steels with different content of microalloying elements V,Nb were designed.The strengthening effects of microalloying elements on the wire rod steel were analyzed through tensile testing,microstructure observation and prior austenite grain size statistics.The results show that the tensile strength of the V⁃steel is 1282.7 MPa,which is increased by 156.5 MPa compared with the base steel and accompanied with a slight increase of total elongation of 13.08%.The tensile strength and total elongation of the V+high Nb steel are 1287.0 MPa and 12.38%,which are increased by 160.8 MPa and 0.25%compared with the base steel,respectively.For high⁃carbon pearlitic steel,adding an appropriate amount of V can refine the pearlite lamellar spacing,however,adding more Nb will not further refine the pearlite lamellar spacing.Besides,the more addition of Nb has no significant effect on the improvement of tensile strength.Therefore,there is no need to add Nb after adding 0.1%V in the high carbon pearlite wire rod.The addition of microalloying element V not only refines the prior austenite grain,but also improves the work⁃hardening ability of the wire rod steel,mainly because the pearlite lamellar spacing is refined,so that it shows better deformation resistance.

关 键 词：微合金元素 珠光体 片层间距 拉伸性能 母相奥氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]