本文采用粉末冶金方法制备了4组不同CeO2含量的超细WC-9％Ni-Cr3C2硬质合金试样.利用HotDisk热常数分析仪,采用瞬变平面热源法(TPS)技术测量了深冷处理前后材料的导热率;采用三点法测量了处理前后合金抗弯强度的变化情况.同时文章还利用XRD、SEM和EDX对合金烧结后的相成分组成与残余应力、微观结构和感兴趣区域进行了检测、观察和分析.结果表明:CeO2的添加降低了合金的热导率和抗弯强度,增加了合金的残余应力;当CeO2添加量为1.35wt.％时(4#合金),三者的变化分别为0.33％、17.17％和38.24％.深冷处理后,不同CeO2含量的WC-9％Ni-Cr3C2热导率、抗弯强度提高幅度可达8.03％(1#合金)和7.23％(1#合金),但同时可在一定程度上降低合金的残余应力.
参考文献
| [1] | Jian Zhang;Yuan Xiao;Guoqiang Luo;Qiang Shen;Lianmeng Zhang .Effect of Ni interlayer on strength and microstructure of diffusion-bonded Mo/Cu joints[J].Materials Letters,2012(1):113-116. |
| [2] | S. IMASATO;K. TOKUMOTO;T. KITADA .Properties of Ultra-Fine Grain Binderless Cemented Carbide 'RCCFN'[J].International Journal of Refractory Metals & Hard Materials,1995(5):305-312. |
| [3] | Gille G.;Bredthauer J. .Advanced and new grades of WC and binder powder - their properties and application[J].International Journal of Refractory Metals & Hard Materials,2000(2/3):87-102. |
| [4] | 陈德勇,罗在清.WC-Ni硬质合金的特性、发展及其应用[J].硬质合金,2007(01):43-46. |
| [5] | Shi K H;Zhou K C;Li Z Y et al.Optimization of initial WC grain size distribution in WC-6％Ni cemented carbides[J].Journal of Materials Eng ineering and Pedormance,2014,23(09):3222-3228. |
| [6] | 傅小明,吴晓东.用活性氧化钨制取中细W和WC工艺研究[J].稀有金属,2003(06):680-683. |
| [7] | Shi Kai-hua;Zhou Ke-chao;Li Zhi-you .Effect of adding method of Cr on microstructure and properties of WC-9Ni-2Cr cemented carbides[J].International Journal of Refractory Metals & Hard Materials,2013(May.):1-6. |
| [8] | A. Y. L. Yong;K. H. W. Seah;M. Rahman .Performance of cryogenically treated tungsten carbide tools in milling operations[J].The International Journal of Advanced Manufacturing Technology,2007(7/8):638-643. |
| [9] | T.V. SreeramaReddy;T. Sornakumar;M. VenkataramaReddy .Machinability of C45 steel with deep cryogenic treated tungsten carbide cutting tool inserts[J].International Journal of Refractory Metals & Hard Materials,2009(1):181-185. |
| [10] | Collins D N.Deep cryogenic treatment of tool steels[J].Heat Treatment Metals,1996(02):40. |
| [11] | R. Thornton;T. Slatter;H. Ghadbeigi .Effects of deep cryogenic treatment on the dry sliding wear performance of ferrous alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2013(1/2):177-191. |
| [12] | SIMRANPREET SINGH GILL;HARPREET SINGH;RUPINDER SINGH .Flank Wear and Machining Performance of Cryogenically Treated Tungsten Carbide Inserts[J].Materials and Manufacturing Processes,2011(10/12):1430-1441. |
| [13] | Dinesh Thakur;B. Ramamoorthy;L. Vijayaraghavan .Influence Of Different Post Treatments On Tungsten Carbide-cobalt Inserts[J].Materials Letters,2008(28):4403-4406. |
| [14] | Huang Duzi,Fan Shuanshi.THERMAL CONDUCTIVITY OF THF CLATHRATE HYDRATE FROM 243 K TO 263 K[J].化工学报,2003(z1):71-75. |
| [15] | D. L. Coats;A. D. Krawitz .Effect of particle size on thermal residual stress in WC-Co composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):338-342. |
| [16] | 史晓亮,杨凯华,汤凤林,邵刚勤.稀土Ce的添加方式对WC-Co硬质合金性能的影响[J].中南大学学报（自然科学版）,2005(02):204-208. |
| [17] | 张立,陈述,SCHUBERT W D,黄伯云.Ce在混合稀土掺杂的硬质合金烧结体表面富集现象的热力学分析[J].硬质合金,2004(02):70-76. |
| [18] | 刘小胡,时凯华,刘志,闵召宇,吴心君.深冷处理对硬质合金物相结构和性能的影响[J].稀有金属与硬质合金,2013(06):42-45. |
| [19] | 徐祖耀;黄本立;鄢国强.材料表征与检测技术手册[M].北京:化学工业出版社,2009 |
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