Ni和Nb元素对Fe-Cr-Mo合金力学和阻尼性能的影响
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摘要
采用光学显微镜、扫描电镜、透射电镜、弯曲共振试验机和万能材料试验机等分析了复合添加质量分数0.8%Ni元素和0.1%Nb元素的Fe-Cr-Mo合金组织和析出相的大小、形态,研究了Ni和Nb元素的添加对FeCr-Mo合金力学性能和阻尼性能的影响。结果表明,Ni和Nb元素的加入不但使合金晶粒显著细化,而且有效抑制了富Cr析出物的析出,使析出物明显细化且分布弥散。晶粒和析出物的细化同时提高了合金的强度和塑韧性,尤其是显著地提高了材料的塑性。1 000和1 100℃退火后,Ni和Nb元素的加入将提高减振合金的矫顽力,降低磁致伸缩系数,使减振合金的阻尼性能降低。900℃退火后,Ni和Nb元素的添加虽然提高了合金的矫顽力,但由于Mo元素的回溶使磁致伸缩系数增大,阻尼性能获得提高。
The microstructure and the size and morphology of precipitates of Fe-Cr-Mo alloy with 0.8%Ni and0.1%Nb addition were analyzed by optical microscope,scanning electron microscope and transmission electron microscope.The influences of Ni and Nb on the mechanical properties and damping capacity of Fe-Cr-Mo alloy were studied by bending resonance device and universal material testing machine.The results indicated that the addition of Ni and Nb not only resulted in significant refinement of grain size,but also effectively inhibited the precipitation of Cr-rich precipitates,and caused dramatically refinement and dispersion of precipitates.The refinement of grains and precipitates simultaneously increases the strength and plasticity of experimental alloys,especially the significant enhancement in plasticity.After annealing at 1 000 and 1 100℃,the addition of Ni and Nb increased the coercivity and decreased the magnetostrictive coefficient of the damping alloy,and thus reduced the damping capacity.After annealing at 900℃,although the Ni and Nb addition enhanced the coercive force of Fe-Cr-Mo alloy,the re-dissolution of Mo increased the magnetostrictive coefficient,and thus the damping capacity was improved.
The microstructure and the size and morphology of precipitates of Fe-Cr-Mo alloy with 0.8%Ni and0.1%Nb addition were analyzed by optical microscope,scanning electron microscope and transmission electron microscope.The influences of Ni and Nb on the mechanical properties and damping capacity of Fe-Cr-Mo alloy were studied by bending resonance device and universal material testing machine.The results indicated that the addition of Ni and Nb not only resulted in significant refinement of grain size,but also effectively inhibited the precipitation of Cr-rich precipitates,and caused dramatically refinement and dispersion of precipitates.The refinement of grains and precipitates simultaneously increases the strength and plasticity of experimental alloys,especially the significant enhancement in plasticity.After annealing at 1 000 and 1 100℃,the addition of Ni and Nb increased the coercivity and decreased the magnetostrictive coefficient of the damping alloy,and thus reduced the damping capacity.After annealing at 900℃,although the Ni and Nb addition enhanced the coercive force of Fe-Cr-Mo alloy,the re-dissolution of Mo increased the magnetostrictive coefficient,and thus the damping capacity was improved.
引文
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[4]Hu X,Du Y,Yan D,et al.Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy[J].Journal of Materials Science and Technology,2018,34:774.
[5]Azcotia C,Karimi A.Magnetomechanical damping in Fe-Cr alloys and effect of Al and Mo addition[J].Journal of Alloys and Compounds,2000,310(1):160.
[6]胡小锋,杜瑜宾,闫德胜,等.Cu的析出及其对FeCrMoCu合金阻尼性能和力学性能的影响[J].金属学报,2017,53(5):601.(Hu X F,Du Y B,Yan D S,et al.Cu precipitation and its effect on dampingcapacity andmechanical properties of FeCrMoCu alloy[J].Acta Metallurgica Sinica,2017,53(5):601.)
[7]易邦旺,钱学君,郎文运,等.镍含量对13Cr型低碳马氏体不锈钢性能的影响[J].金属功能材料,1997,4(2):75.(Yi B W,Qian W J,Lang W Y,et al.The influence of the Nicontent on properties of 13Cr-series low carbon martensitic stainless steel[J].Metallic Functional Materials,1997,4(2):75.)
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[9]胡小锋,李秀艳,张波,等.Nb,Ti和Cu对Fe-13Cr-2.5Mo合金阻尼与腐蚀性能的影响[J].金属学报,2009,45(6):717.(HU X F,Li X Y,Zhang B.et al.Influence of additions of Nb,Ti and Cu on damping capacity and corrosion resistance of Fe-13Cr-2.5Mo alloy[J].Acta Metallurgica Sinica,2009,45(6):717.)
[10]李军,赵宇,喻晓军,等.镍对Fe-Cr系软磁合金耐蚀性及磁性能的影响[J].钢铁研究学报,2006,18(5):54.(Li J,Zhao Y,Yu X J,et al.Effect of nickel on corrosion resistance and magnetic properties of Fe-Cr soft magnetic alloys[J].Journal of Iron and Steel Research,2006,18(5):54.)
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