采用双辉等离子渗金属技术,在20钢表面进行W-Mo-Dy三元共渗.探讨了气压、保温时间、温度对合金渗层厚度的影响,并获本试验条件下的最佳工艺参数.对合金渗层金相显微组织和形成机理进行分析；用能谱仪检测合金元素的浓度和分布；用XRD分析合金渗层物相.结果表明:在本试验条件下最佳工艺参数为气压30 Pa,保温时间4.5h,温度1020℃,获得的共渗合金层厚度约115 μm;合金渗层中W、Mo合金元素含量随到试样表面的距离增加而减少,呈梯度分布；由于稀土的较大原子半径与核外电子的极化作用使得Dy分布不规律；合金渗层的物相主要为Fe( Mo,W,Dy)、Dy2O3和少量的DyFe10Mo2等.
参考文献
| [1] | Yan M F;Bell T;Sun Y et al.Effect of temperature and phase constitution on the kinetics of La diffusion[J].Journal of Rare Earths,2002,20(04):44. |
| [2] | Yan MF.;Bell T.;Liu ZR.;Pan W. .The effect of rare earth catalyst on carburizing kinetics in a sealed quench furnace with endothermic atmosphere[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2001(1/2):91-94. |
| [3] | Liu Z R;Zhu F Y;Cui Y X et al.Microstructure of surface layer formed at low temperature and high carbon concentration carburizing with rare earth element[J].Rare Earth,1993,113,11(03):196. |
| [4] | Bell T;Sun Y;Liu Z R et al.Rare earth surface engineering[J].Heat Treatment of Metals,2001,27(01):1. |
| [5] | Zhang zhenxun.The effect of rare earth elements on kinetics of boro-aluminzed layer growing by party agent[A].Moscow,1990:182. |
| [6] | 徐重.双层辉光离子渗金属技术[J].太原工业大学学报,1993(增刊):30. |
| [7] | 徐光宪.稀土[M].北京:冶金工业出版社,2002:423-433. |
| [8] | 李成明;田林海;徐重 等.双层辉光离子渗金属中W-Mo合金供给源的研究[J].材料科学与工艺,1998,6(04):109-111. |
| [9] | 徐重;王振民;古凤英.双层辉光离子渗金属技术[J].金属热处理学报,1982(01):71. |
| [10] | 高原,徐晋勇,高清,安晋平,徐重.双层辉光离子渗金属技术特点[J].中国工程科学,2008(02):26-30. |
| [11] | Yuan Z X;Yu Z S;Tan P et al.Effect of rare earth on the carburization of steel[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1999,267:162. |
| [12] | Jackman J R.Researh on the application of rare earth in the steel smelting[A].University of Missouri,Ralla,1981:15-18. |
| [13] | Mehrer H;Galler R .Vacancy-mediated diffusion in quasicrystalline alloys[J].Journal of Alloys and Compounds,2002,342:296. |
| [14] | Wenjuan Liu;Fahe Cao;Linrong Chang;Zhao Zhang;Jianqing Zhang .Effect of rare earth element Ce and La on corrosion behavior of AM60 magnesium alloy[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2009(6):1334-1343. |
| [15] | WU Yie-ming;WANG Long-mei;DU Ting .Thermodynamics of rare earth elements in liquid iron[J].Less Common Meatal,1985,110(1-2):187-193. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%