HRB600E高强抗震钢筋试制开发
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摘要
为适应建筑用钢市场发展需求,采用铌钒复合微合金化工艺,对HRB600E高强抗震钢筋进行了试制,并用拉力试验机、材料试验机和金相显微镜,对试制钢筋的力学性能、疲劳性能、显微组织及夹杂物进行了检验分析。结果表明,试制钢筋具有良好的抗震性、时效性、焊接性能及疲劳性能,综合性能良好;钢筋显微组织为铁素体+珠光体(体积分数≥45%),晶粒度≥10级,晶粒均匀,夹杂物主要为A、C和D类夹杂物,均<1.5级,夹杂物数量少且尺寸较小,钢筋内部质量良好。
In order to meet the needs of the market development of construction steel,HRB600 Ehigh-strength anti-seismic rebars was trial produced through Nb-V compound microalloyed process.The mechanical properties,fatigue properties,microstructure and inclusions of the trial producing rebars were tested and analyzed by using tension tester,material tester,and metallographic microscopy.The results showed that the trial producing rebars have favorable comprehensive properties such as good anti-seismic properties,aging properties,welding properties and fatigue properties.The microstructure of the trial producing rebars were consisted of ferrite and pearlite(content equal or greater than 45%),the size of ferrite grains was equal or greater than 10 grade,and the uniformly distributed particles were achieved.The inclusions mainly were A,C and D inclusion,and the all were less than 1.5 grades.The number and size of all inclusions were small.The trial producing rebars had good internal quality.
In order to meet the needs of the market development of construction steel,HRB600 Ehigh-strength anti-seismic rebars was trial produced through Nb-V compound microalloyed process.The mechanical properties,fatigue properties,microstructure and inclusions of the trial producing rebars were tested and analyzed by using tension tester,material tester,and metallographic microscopy.The results showed that the trial producing rebars have favorable comprehensive properties such as good anti-seismic properties,aging properties,welding properties and fatigue properties.The microstructure of the trial producing rebars were consisted of ferrite and pearlite(content equal or greater than 45%),the size of ferrite grains was equal or greater than 10 grade,and the uniformly distributed particles were achieved.The inclusions mainly were A,C and D inclusion,and the all were less than 1.5 grades.The number and size of all inclusions were small.The trial producing rebars had good internal quality.
引文
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[11]齐亮,赵爱民,赵征志,等.铌对高钢级管线钢中碳氮化物析出热力学影响[J].材料科学与工艺,2012,20(6):29-34.
[2]林双平,苗明明,张岩,等.建筑用高强抗震钢筋[J].金属热处理,2012,37(7):102-105.
[3]李阳,黄文克,麻晗.高强钢筋HRB600的连续冷却转变组织和性能研究[J].热加工工艺,2014,43(4):68-70,73.
[4]完卫国,孙维,郭湛.铌微合金化控冷HRB400钢筋的试制[J].中国冶金,2011(5):7-12.
[5]潘洪波,汪杨,阎军,等.Nb含量及工艺对HRB600钢筋组织与性能的影响[J].建筑材料学报,2017,20(3):392-398.
[6]东涛,付俊岩.铌/钒微合金化400MPaⅢ级钢筋的生产技术[J].中国冶金,2004(5):1-5,14.
[7]马福昌,刘永龙,宋瑞甫,等.Nb、V、Ti微合金元素对连铸坯表面质量的影响[J].宽厚板,2003,9(4):14-18.
[8]祝桂合,赵乾,马兴云,等.含Nb低合金钢热履历对铸坯及轧后钢板的影响[C]//第四届发展中国家连铸国际会议论文集.北京:中国金属学会,2008.
[9]Xu Guang,Gan Xiaolong,Ma Guojun,et al.The development of Ti-alloyed high strength microalloy steel[J].Materials and Design,2010,31(6):2891-2896.
[10]曹建春,雍岐龙,刘清友,等.含铌钼钢中微合金碳氮化物沉淀析出及其强化机制[J].材料热处理学报,2006,27(5):51-55.
[11]齐亮,赵爱民,赵征志,等.铌对高钢级管线钢中碳氮化物析出热力学影响[J].材料科学与工艺,2012,20(6):29-34.