热镀锌法提高B82MnQL材料的抗拉强度研究
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摘要
目的增强B82Mn QL材料的抗拉强度。方法以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测试,借助金相显微镜、扫描电镜分析几种镀锌工艺下的横截面和轴向截面以及拉拔断口的组织形貌,同时测试显微硬度。结果 B82Mn QL盘条拉拔后钢丝的抗拉强度由原来的1250 MPa提高至1670 MPa。断面收缩率由32.5%下降至7%。采用新镀锌工艺和助镀配方,B82Mn QL钢丝镀锌后抗拉强度下降幅度为8%,低于传统的10%~15%。稳定化后B82Mn QL的扭转次数为20次左右,反复弯曲次数为6次左右,强度由1650 MPa提高至1710 MPa,硬度值比镀锌后有较大提高,由镀锌后的430HV升高至450HV,而且分布均匀。结论通过优化镀锌工艺,能大幅提高B82Mn QL盘条的抗拉强度。
Objective To enhance the tensile strength of the B82 Mn QL material. Methods The B82 Mn QL wire rod was used as the material for hot dip galvanizing experiment,and its mechanical properties were tested using tensile testing machine and repeated bending testing machine. The microstructures of the cross section,the axial section and the drawing fracture were analyzed by means of optical microscopy and scanning electron microscopy. Results The tensile strength of the B82 Mn QL wire rod after drawing was increased from 1250 MPa to 1670 MPa. The shrinkage rate of the cross section was decreased from 32. 5% to 7%. Using the new galvanizing technology and the formula of the assistant plating,the tensile strength of the galvanized B82 Mn QL steel wire was decreased by 8%,lower than traditional 10% ~ 15%. After stabilization,the B82 Mn QL's torsion value was about 20 times,with about 6 times of repeated bending. The strength was increased from 1650 MPa to 1710 MPa. The hardness value was higher than that of the galvanized material,raised from 430 HV to 450 HV,and uniformly dispersed. Conclusion Through optimization of the galvanizing process,the tensile strength of B82 Mn QL wire rod was largely enhanced.
Objective To enhance the tensile strength of the B82 Mn QL material. Methods The B82 Mn QL wire rod was used as the material for hot dip galvanizing experiment,and its mechanical properties were tested using tensile testing machine and repeated bending testing machine. The microstructures of the cross section,the axial section and the drawing fracture were analyzed by means of optical microscopy and scanning electron microscopy. Results The tensile strength of the B82 Mn QL wire rod after drawing was increased from 1250 MPa to 1670 MPa. The shrinkage rate of the cross section was decreased from 32. 5% to 7%. Using the new galvanizing technology and the formula of the assistant plating,the tensile strength of the galvanized B82 Mn QL steel wire was decreased by 8%,lower than traditional 10% ~ 15%. After stabilization,the B82 Mn QL's torsion value was about 20 times,with about 6 times of repeated bending. The strength was increased from 1650 MPa to 1710 MPa. The hardness value was higher than that of the galvanized material,raised from 430 HV to 450 HV,and uniformly dispersed. Conclusion Through optimization of the galvanizing process,the tensile strength of B82 Mn QL wire rod was largely enhanced.
引文
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[19]唐玲,陈红军.镀锌钢丝锌层重量试验方法的比较[J].电线电缆,2004(4):41—42.TANG Ling,CHEN Hong-jun.Comparison of the Test Methods for Measuring the Mass of Zinc Coating on Galvanized Wires[J].Electric Wire&Cable,2004(4):41—42.
[2]袁文.2010—2011欧盟经济和钢铁市场展望[J].冶金管理,2010(2):32—36.YUAN Wen.EU Economic and Steel Market Outlook of2010—2011[J].China Steel Focus,2010(2):32—36.
[3]毛艳丽,陈妍,吴美庆.国外四大钢铁企业的研发动向[J].冶金管理,2010(2):45—48.MAO Yan-li,CHEN Yan,WU Mei-qing.Research and Development Trends of Foreign Four Major Iron and Steel Enterprises[J].China Steel Focus,2010(2):32—36.
[4]崔振铎,孔俊其,张玉军,等.我国PC钢棒用线材生产现状及发展趋势[J].天津冶金,2003(5):32—35.CUI Zhen-duo,KONG Jun-qi,ZHANG Yu-jun,et al.Current Situation and Development Trend of the Wire Rods for PC Steel Bars in China[J].Tianjin Metallurgy,2003(5):32—35.
[5]刘胜林,孙亮,袁毅,等.热镀锌层在模拟湿热酸性大气环境中的耐蚀性研究[J].表面技术,2015,44(2):99—104.LIU Sheng-lin,SUN Liang,YUAN Yi,et al.Research on the Corrosion Resistance of Hot Dip Galvanized Coating in Simulated Hot and Humid Acidic Atmospheric Environment[J].Surface Technology,2015,44(2):99—104.
[6]赵艳,郭瑞光,姚倩,等.热浸镀锌层表面钛盐转化处理的研究[J].表面技术,2012,41(2):70—73.ZHAO Yan,GUO Rui-guang,YAO Qian,et al.Titanium-salt Conversion Processon Hot-dip Galvanized Coating[J].Surface Technology,2012,41(2):70—73.
[7]刘峰,宋弘清,黄政然,等.沿海地区输电铁塔防护涂层耐腐蚀性能研究[J].装备环境工程,2015(4):76—81,88.LIU Feng,SONG Hong-qing,HUANG Zheng-ran,et al.Anti-corrosion Properties of Protective Coatings for Transmission Line Iron Tower in Coastal Area[J].Equipment Environmental Engineering,2015(4):76—81,88.
[8]刘雨薇,王振尧,吕旺燕,等.模拟酸雨大气环境中Cl-浓度对镀锌钢腐蚀行为的影响[J].装备环境工程,2015(4):22—26,43.LIU Yu-wei,WANG Zhen-yao,LYU Wang-yan,et al.Effects of Cl-Concentration on Corrosion Behavior of Hotdip Galvanized Steel in Simulated Acid Rain Atmospheric Environment[J].Equipment Environmental Engineering,2015(4):22—26,43.
[9]游胜意,周生根,汪训政.国产盘条生产桥梁缆索用镀锌钢丝的研究[J].金属制品,2007,33(2):19—22.YOU Shen-yi,ZHOU Sheng-gen,WANG Xun-zheng.Production Research of Galvanizing Steel Wire for Bridge Cable with Homemade Wire Rod[J].Steel Wire Products,2007,33(2):19—22.
[10]陈新.热镀锌中主要合金元素的作用及机理研究[J].云南冶金,2009,38(4):45—47.CHEN Xin.The Effect and Mechanism of Main Alloy Element in Hot Dip Galvanized Zinc[J].Yunnan Metallurgy,2009,38(4):45—47.
[11]黄永智,李运刚.热镀锌液中添加微量元素的作用[J].电镀与精饰,2013,35(1):14—18.HUANG Yong-zhi,LI Yun-gang.Reviews on the Effect of Alloying Elements in Hot-dip Galvanizing Melt[J].Plating and Finishing,2013,35(1):14—18.
[12]胡显军,陈少慧,方峰,等.时效处理对高碳钢盘条性能的影响[J].金属热处理,2007,32(3):36—40.HU Xian-jun,CHEN Shao-hui,FANG Feng,et al.Effect of Aging Treatment on Mechanical Properties of High Carbon Steel Wire Rods[J].Heat Treatment of Metals,2007,32(3):36—40.
[13]魏世丞,朱晓飞,魏绪钧.热镀锌钢丝助镀剂的研究[J].有色矿冶,2002,18(3):33—35.WEI Sheng-cheng,ZHU Xiao-fei,WEI Xu-jun.Study of Flux For Hot Dipping Zinc Steel Wire[J].Non-ferrous Mining and Metallurgy,2002,18(3):33—35.
[14]崔影.钢丝热镀锌炭渣擦拭原理分析[J].金属制品,2006,32(5):27—28.CUI Ying.Principle Analysis of Wiping with Breeze for Hot Galvanizing Steela Wire[J].Metal Products,2006,32(5):27—28.
[15]曾智宇.电磁擦拭法在钢丝热镀锌中的应用[J].金属制品,2012,38(1):27—29.ZENG Zhi-yu.Application of Electromagnetic Wipe Method to Steel Wire Hot-galvanizing[J].Metal Products,2012,38(1):27—29.
[16]周和敏,李贵奇,朱龙,等.高强度预应力钢丝稳定化处理工艺及对产品性能的影响[J].金属热处理,2001,26(9):29—31.ZHOU He-min,LI Gui-qi,ZHU Long,et al.The Stabilizing Process of High Strength Pre-stressed Concrete Steel Wire and Its Effects on Properties of the Steel Wire[J].Heat Treatment of Metals,2001,26(9):29—31.
[17]赵云龙,杨兴亮,张建.锌锅能量因素对热镀锌钢板表面质量的影响[J].安徽冶金,2012(4):48—50.ZHAO Yun-long,YANG Xing-liang,ZHANG Jian.Effects of Zinc Pot Temperature and Dipping Time on Surface Quality of Galvanized Sheet[J].Anhui Metallurgy,2012(4):48—50.
[18]薛宪营,郎苗霞,马孝娟.82B盘条拉拔断裂原因分析[J].新疆钢铁,2009(4):14—17.XUE Xian-ying,LANG Miao-xia,MA Xiao-juan.Drawing Fracture Cause Analysis of 82B Wire Rod[J].Xinjiang Iron and Steel,2009(4):14—17.
[19]唐玲,陈红军.镀锌钢丝锌层重量试验方法的比较[J].电线电缆,2004(4):41—42.TANG Ling,CHEN Hong-jun.Comparison of the Test Methods for Measuring the Mass of Zinc Coating on Galvanized Wires[J].Electric Wire&Cable,2004(4):41—42.