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镁系易切削钢中夹杂物分析

朱强斌 李杰 邓向阳 田钱仁 曾志崎 付建勋

朱强斌, 李杰, 邓向阳, 田钱仁, 曾志崎, 付建勋. 镁系易切削钢中夹杂物分析[J]. 钢铁钒钛, 2021, 42(2): 179-187, 192. doi: 10.7513/j.issn.1004-7638.2021.02.029
引用本文: 朱强斌, 李杰, 邓向阳, 田钱仁, 曾志崎, 付建勋. 镁系易切削钢中夹杂物分析[J]. 钢铁钒钛, 2021, 42(2): 179-187, 192. doi: 10.7513/j.issn.1004-7638.2021.02.029
Zhu Qiangbin, Li Jie, Deng Xiangyang, Tian Qianren, Zeng Zhiqi, Fu Jianxun. Inclusion analysis in magnesium free-cutting steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 179-187, 192. doi: 10.7513/j.issn.1004-7638.2021.02.029
Citation: Zhu Qiangbin, Li Jie, Deng Xiangyang, Tian Qianren, Zeng Zhiqi, Fu Jianxun. Inclusion analysis in magnesium free-cutting steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 179-187, 192. doi: 10.7513/j.issn.1004-7638.2021.02.029

镁系易切削钢中夹杂物分析

doi: 10.7513/j.issn.1004-7638.2021.02.029
基金项目: 国家自然科学基金资助项目(51874195,51671124)
详细信息
    作者简介:

    朱强斌(1998—),男,硕士生,安徽人,主要从事高品质特殊钢中夹杂物分析,E-mail:zhuqbex13093696883@163.com

    通讯作者:

    付建勋(1969—),男,博士,教授,主要从事高品质特殊钢的开发与品质提升,E-mail:fujianxun@shu.edu.cn

  • 中图分类号: TF76

Inclusion analysis in magnesium free-cutting steel

  • 摘要: 为了探究Mg处理对易切削钢中夹杂物的影响,以1144高硫易切削钢为试验钢种,采用金相和能谱仪等手段研究了Mg处理对1144易切削钢中夹杂物的形态、尺寸分布和夹杂物成分的影响。结果表明:在易切削钢铸坯中,Mg处理使得易切削钢铸坯硫化物夹杂由Ⅱ类向Ⅲ类、Ⅰ类转变,分布更为均匀,同时使得复合硫化锰夹杂物比例提升。在轧材中,使得钢中夹杂物球化,并且钢中硫化锰夹杂物的尺寸和分布也得到了较好的改善,同时,Mg处理能够有效提高易切削钢的切削加工性能。
  • 图  1  取样过程示意

    Figure  1.  Diagram of the sampling process

    图  2  铸坯金相照片

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  2.  Metallographic reproduction of casting billet

    图  3  铸坯中夹杂物二维形貌

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  3.  Two-dimensional morphology of the inclusions in casting billet

    图  4  铸坯中夹杂物三维形貌

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  4.  Three-dimensional morphology of the inclusions in casting billet

    图  5  铸坯夹杂物统计数据

    (a)、(b):对比炉;(c)、(d):试验炉

    Figure  5.  Statistics of the inclusions in casting billet

    图  6  铸坯典型夹杂物能谱照片

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  6.  Energy spectrum results of typical inclusions in billets

    图  7  轧材评级金相图片

    (a)、(b)、(c)、(d):对比炉;(e)、(f)、(g)、(h):试验炉

    Figure  7.  Metallographic phots for rolled material rating

    图  8  轧材扫描能谱

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  8.  Scanning energy spectra of rolled steel

    图  9  轧材三维形貌

    (a)、(b)、(c):对比炉;(d)、(e)、(f):试验炉

    Figure  9.  3D morphology of rolled steel

    图  10  切削用圆棒试样

    Figure  10.  Round bar for cutting

    图  11  对比炉和试验炉轧材切屑放大对比

    Figure  11.  Comparison of amplificated scrap rolled in reference furnace and experimental furnace

    表  1  1144易切削钢试验钢种成分要求

    Table  1.   1144 test steel composition requirements for free cutting steel %

    CSiMnPS
    内控指标0.43~0.470.18~0.251.45~1.52<0.0250.24~0.30
    目标0.450.221.470.27
    下载: 导出CSV

    表  2  夹杂物统计数据

    Table  2.   Statistics of inclusions according to its size

    传统工艺新工艺(Mg处理)
    夹杂物平均面积/μm2夹杂物等效直径/μm夹杂物密度/(个·mm−2)夹杂物平均面积/μm−2夹杂物等效直径/μm夹杂物密度/(个·mm−2)
    中心13.9093.873116916.4124.2451101
    1/4处16.8584.091121118.0654.3341065
    边部16.4314.39586416.3434.10695
    下载: 导出CSV

    表  3  铸坯中夹杂物类型统计

    Table  3.   Statistics of inclusion types in billets

    类型对比炉试验炉
    个数 比例/% 个数 比例/%
    单纯MnS 564 97.2 553 93.9
    复合夹杂物 16 2.8 36 6.1
    Al-O-MnS复合硫化物 14 2.5 0 0
    Mg-Al-O-MnS复合硫化物 2 0.3 10 1.7
    Mg-Al-Ca-Si-O-MnS复合硫化物 0 0 26 4.4
    下载: 导出CSV

    表  4  轧材A类夹杂物评级结果

    Table  4.   Results of grade inclusions of rolled steel

    炉次对比炉次试验炉次
    细系长度/μm细系评级粗系长度/μm粗系评级细系长度/μm细系评级粗系长度/μm粗系评级
    1 2690 5.5 1647 4.0 2110 4.5 1317 2.5
    2 2291 5.0 2434 5.0 2682 5.5 890 2.5
    3 2206 4.5 1569 4.0 2369 5.0 1167 2.0
    4 2108 4.5 1741 4.0 1 999 4.5 1719 4.0
    5 2296 5.0 1658 4.0 2537 5.0 1690 4.0
    6 2845 5.5 1562 4.0 2431 5.0 1795 4.0
    7 3341 6.0 2292 5.0 2606 5.0 1322 2.5
    8 2911 5.5 2242 5.0 2766 5.5 1564 4.0
    下载: 导出CSV

    表  5  切削试验参数

    Table  5.   Parameters of cutting test

    进给量f/(mm·r−1)切削深度aq/mm转速w/(r·min−1)
    0.191180
    0.191560
    0.091560
    0.0911200
    下载: 导出CSV
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  • 收稿日期:  2020-09-21
  • 刊出日期:  2021-04-10

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