氮含量对29Cr铸造超级双相不锈钢深冷组织和性能的影响
Effects of Nitrogen on Microstructure and Properties of 29Cr Cast Super Duplex Stainless Steel after Cryogenic Treatment
摘 要
采用金相显微镜(OM)、X射线衍射仪(XRD)、环境扫描电子显微镜(ESEM)、万能材料试验机、洛氏硬度计和电化学极化曲线研究了氮含量对经深冷处理的29Cr铸造超级双相不锈钢金相组织、力学性能和耐蚀性的影响。结果表明, 深冷处理后, 含氮量与奥氏体(γ)之间的关系为(γ)=99.4×w(N)+6.158 8; 氮含量越高, 试样的抗拉强度和延伸率越大;氮含量的提高可降低材料在人工海水中的腐蚀电流密度, 提高耐蚀性。
氮含量
深冷处理
力学性能
耐蚀性
29Cr cast super duplex stainless steel
nitrogen content
cryogenic treatment
mechanical property
corrosion resistance
Abstract
The effects of nitrogen content on microstructure, mechanical properties and corrosion resistance of 29Cr cast super duplex stainless steel after cryogenic treatment were studied by modern means of optical microscopy(OM), X-ray diffraction (XRD), environmental scanning electron microscopy (ESEM), universal testing machine, Rockwell hardness tester and electrochemical polarization curves. The results indicated that nitrogen could increase the amount of γ phase in the steel according to a linear relationship of (γ)=99.4×w(N)+6.158 8; and the higher the nitrogen content in the sample, the greater the tensile strength and the elongation; the increase of nitrogen could reduce the corrosion current density of the sample after cryogenic treatment, and improve the corrosion resistance.
中图分类号 TG174 DOI 10.11973/fsyfh-201508004
所属栏目 试验研究
基金项目 科技部科技人员服务企业项目(2009GJC40018); 福建省青年人才创新基金项目(2008F3061); 福州大学科技发展基金项目(2008-QX-16)
收稿日期 2014/7/15
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备注黄伟林(1984-), 工程师, 硕士, 从事特种金属材料研究,
引用该论文: HUANG Wei-lin,XIANG Hong-liang,CHEN Tong,CHEN Chao-yang. Effects of Nitrogen on Microstructure and Properties of 29Cr Cast Super Duplex Stainless Steel after Cryogenic Treatment[J]. Corrosion & Protection, 2015, 36(8): 711
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【3】夏兰廷,黄桂桥,张三平. 金属材料的海洋腐蚀与防护[M]. 第1版.北京: 冶金工业出版社,2003: 89-123.
【4】郎咸东,金瑛. 低温用奥氏体不锈钢阀门零件的深冷处理[J]. 阀门,2002(2): 19-21.
【5】向红亮,黄伟林,刘东,等. N含量对29Cr铸造超级双相不锈钢组织及性能的影响[J]. 金属学报,2010,46(3): 304-310.
【6】向红亮,黄伟林,刘东,等. 铸造SAF2906不锈钢在人工海水中的电化学阻抗谱[J]. 材料热处理学报,2013,34(1): 81-85.
【7】MOHAN L D,RENGANARAYANAN S,KALANID-HI A. Cryogenic treatment to augment wear resistance of tool and die steels[J]. Cryogenics,2001,41(3): 149-155.
【8】李雄. 深冷处理对高速钢力学性能及摩擦磨损影响机理的研究[D]. 兰州: 甘肃工业大学硕士学位论文,2001.
【9】LEBEDEV A A,KOSARCHUK V V. Influence of phase transformations on the mechanical properties of austenitic stainless steels[J]. International Journal of Plasticity,2000,16(7/8): 749-767.
【10】TANG P S. Deep cryogenics: The great cold debate[J]. Heat Treating,1986,18(2): 28-32.
【11】郭帅. 热处理及合金元素对高铬铸铁微观组织和性能的影响[D]. 福州: 福州大学硕士学位论文,2006.
【12】OXLEY P,GOODELL J,MOLT R. Magnetic properties of stainless steels at room and cryogenic temperatures[J]. Journal of Magnetism and Magnetic Materials,2009,321(4): 2107-2114.
【13】FREDJ N B,SIDHOM H. Effects of the cryogenic cooling on the fatigue strength of the AISI 304 stainless steel ground components[J]. Cryogenics,2006,46(6): 439-448.
【14】FREUDENBERGER J,GAGANOV A,HICKMAN A L,et al. Mechanical behaviour of high nitrogen stainless steel reinforced conductor for use in pulsed high field magnets at cryogenic temperature[J]. Cryogenics,2003,43(2): 133-136.
【15】张红,王俊杰,郭嘉. 深冷处理对3Cr13组织和力学性能的影响[J]. 热加工工艺,2008,37(22): 64-66.
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【23】XUAN F,HUANG X,TU S. Comparisons of 30Cr2Ni4MoV rotor steel with different treatments on corrosion resistance in high temperature water[J]. Materials & Design,2008,29(8): 1533-1539.
【24】杨永雷. 基于深冷处理的钻头磨损规律及其寿命研究[D]. 北京: 北方工业大学硕士学位论文,2008.
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