ISSN：1003-8620

CN：42-1243/TF

主管：中信泰富特钢集团股份有限公司

主办：大冶特殊钢有限公司

特殊钢 ›› 2013, Vol. 34 ›› Issue (2): 52-54.

• 组织和性能 • 上一篇    下一篇

Al、Ti、Nb微合金化对ZF7渗碳钢晶粒混晶的影响

李绍杰1，樊一丁1，黄胜永1,2   

  1. 1石家庄钢铁有限责任公司开发部,石家庄 050031；
    2北京科技大学冶金与生态工程学院，北京 100083；
  • 收稿日期:2012-10-09 出版日期:2013-04-01 发布日期:2022-10-08
  • 作者简介:李绍杰(1979-)，男，硕士，工程师，2006年贵州大学毕业，特殊钢失效分析及弹簧钢新产品开发。

Effect of Al, Ti, Nb Microalloying on Mixed Grain Size of Case-Hardened Steel ZF7

Li Shaojie1， Fan Yiding1， Huang Shengyong1,2   

  1. 1 Development Department, Shijiazhuang Iron and Steel Co Ltd, Shijiazhuang 050031 ；
    2 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ；
  • Received:2012-10-09 Published:2013-04-01 Online:2022-10-08

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摘要： 研究了(/%)0.023Alsol、0.035Alsol、0.018～0.019Alsol-0.012～0.014Ti和0.019～0.020Alsol-0.031～0.032Nb微合金化对60 t BOF-LF-VD-300 mm×360 mm CC-连轧工艺生产的Φ120 mm ZF7渗碳钢(/%:0.18～0.20C、0.22～0.25Si、1.22～1.30Mn、0.008～0.016P、0.019～0.029S、1.19～1.25Cr、0.001 8～0.002 2B)930℃加热时晶粒度混晶的影响。结果表明,在930℃ 7.5 h热处理条件下,当Alsol为0.035%时ZF7钢未发生混晶现象,当钢中(/%)0.023Alsol或0.018～0.019Alsol-0.012～0.014Ti或0.019～0.020Alsol-0.031～0.032Nb微合金化时,ZF7钢均发生了混晶现象,说明钢中有足够的Alsol含量是防止ZF7钢发生混晶的关键因素。 

关键词: ZF7渗碳钢, Alsol、Ti、Nb, 微合金化, 混晶

Abstract:  Effect of (/% ：) 0.023Alsol, 0.035Alsol、, 0.018~0.019Alsol-0.012~0.014Ti and 0.019~0.020Alsol-0.031 ~0.032Nb microalloying on mixed grain size of Φ120 mm case hardened steel ZF7 (% ： 0.18~0.20C, 0.22~0.25Si, 1.22~1.30Mn, 0.008~0.016P, 0.019~0.029S, 1.19~1.25Cr, 0.0018~0.0022B) produced by 60 t BOF-LF-VD-300 mm x 360 mm CC-continuous rolling process and heated at 930 °C has been studied. Results show that with heat treatment condition at 930 °C for 7.5 h, as Alsol content in steel is 0.035% , there is no mixed grain size occurred in steel ZF7, but in steel ZF7 microalloying with (/% ：) 0.023Alsol, 0.018 〜0.019Alsol-0.012~0.014Ti or 0.019~0.020Alsol-0.031 ~0.032Nb the phenomena of mixed grain size occurs in steel, it is indicated that the steel has sufficient Alsol content is key factor to avoid mixed grain size occurring in steel ZF7.

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