本文分析总结了国内外在片晶硬质合金方面的研究成果.片晶WC的形成主要有两种方式,溶解-析出(再结晶)和通过在各种化学介质中片晶WC成核并长大.高度取向片状WC的制备是W颗粒尽可能被压成片状后,与石墨反应转化为高度取向的片状复式碳化物(CoxWyGz)聚集颗粒,再转化为片状WC.混乱取向的片状WC硬质合金可通过使用CoxWyCx+C混合粉末进行制备.片晶WC硬质合金通过区域性微裂纹、裂纹偏转、裂纹分枝、裂纹龟裂及裂纹桥接等方式阻碍了裂纹进一步扩展,提高了合金断裂韧性.片晶硬质合金具有更为优异的室温力学性能和高温力学性能,在切削应用研究中也表现出了优异的耐磨性和抗崩刃性.但是,目前片晶硬质合金的生产工艺存在着碳含量难以控制以及烧结温度过高等的问题,限制了其产业化生产及应用领域.
参考文献
| [1] | 张立,陈述,黄方杰,单成,程鑫,马鋆.微量钴对无金属粘结相WC硬质合金烧结致密化与WC晶粒生长行为的影响[J].硬质合金,2011(05):271-275. |
| [2] | 张立,王元杰,余贤旺,王振波.WC粉末粒度与形貌对硬质合金中WC晶粒度、晶粒形貌与合金性能的影响[J].中国钨业,2008(04):23-26. |
| [3] | 刘咏,王海兵,羊建高,贺跃辉,龙郑易.梯度硬质合金结构与性能的关系[J].粉末冶金材料科学与工程,2005(06):356-360. |
| [4] | 陈伟民,王威威,周鹏,彭英彪,张伟彬,王爱军,陈利,杜勇.梯度硬质合金及耐磨涂层的计算模拟和实验验证[J].硬质合金,2012(05):268-278,288. |
| [5] | 付龙,柳学全,李一,丁存光,李立鑫,姜丽娟.国内外矿用高耐磨、高韧性硬质合金新技术[J].硬质合金,2012(04):254-261. |
| [6] | 张立,陈述,张传福,黄伯云.含板状晶WC双模组织结构硬质合金的研究[J].稀有金属,2004(06):979-982. |
| [7] | 李志林,朱丽慧,卞凯强.板状WC晶种加入对硬质合金性能的影响[J].硬质合金,2009(03):157-160. |
| [8] | Du Pont .Cobalt-bonded tungsten carbide[P].USA,US3451791A,1969-06-24. |
| [9] | Du Pont .Anisodimensional tungsten carbide platelets bonded with cobalt[P].USA,US3647401A,1972-03-07. |
| [10] | Brun M K;Neurgaonkar R R;Stubican V S .Precipitation studies in the system WC-TiC[J].Journal of the American Ceramic Society,1975,58(9-10):392-395. |
| [11] | Kobayashi M;Yamaya S.Investigation of cemented tungsten carbides with twinned WC grains[A].Reutte:Metallwerk Plansee,1981:597-611. |
| [12] | Keiichi Kobori;Mitsuo Ueki;Tsuyoshi Saito et al.Some properties of WC-.BETA.t-Co cemented carbide having stratified structures of shect-like WC phases[J].Journal of the Japan Society of Powder and Powder Metallurgy,1989,36(4):379-384. |
| [13] | Toshiba Tungaloy Co.,Ltd .Plate-crystalline tungsten carbidecontaining hard alloy,composition for forming plate-crystalline tungsten carbide and process for preparing said hard alloy[P].Europe,EP0759480 A1,1997-02-26. |
| [14] | 东芝图格莱株式会社 .含片晶WC的硬质合金、其制法及形成片晶WC的组合物[P].中国,CN95116624.7,1997-03-05. |
| [15] | Toshiba Tungaloy Co.,Ltd .Plate--crystalline tungsten carbide-containing hard alloy,composition for forming plate-crystalline tungsten earbide and process for preparing said hard alloy[P].USA,US5918103A,1999-06-29. |
| [16] | Toshiba Tungaloy Co.,Ltd .Plate-crystalline tungsten carbide-containing hard alloy,composition for forming plate-crystalline tungsten carbide and process for preparing said hard alloy[P].USA,US5993506A,1999-11-30. |
| [17] | Schn A;Schubert W D.WC Platelet-containing Hardmetals[A].Reutte:Plansee Holding AG,2001:322-336. |
| [18] | Toshiba Tungaloy Co.,Ltd .Plate-crystalline tungsten carbide-containing hard alloy,composition for forming plate-crystalline tungsten carbide and process for preparing said hard alloy[P].USA,US5918103,1999-06-29. |
| [19] | Satoshi Kinoshita;Masaki Kobayashi;Yasuro Taniguchi .Effect of Starting Powder Size and Ball-Milling Time on Microstructure of WC-Co Base Cemented Carbides Prepared from W+C+Co Base Mixed Powder[J].粉体ぉょび粉末冶金,2003(5):377-384. |
| [20] | YOUNG JOON PARK;NONG MOON HWANG;DUK YONG YOON .Abnormal Growth of Faceted (WC) Grains in a (Co) Liquid Matrix[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(9):2809-2819. |
| [21] | Satoshi Kinoshita;Takeshi Saito;Masaki Kobayashi et al.Mechanisms for formation of highly oriented plate-like triangular prismatic WC grains in WC-Co base cemented carbides prepared from W and C instead of WC[J].Journal of the Japan Society of Powder and Powder Metallurgy,2001,48(1):51-60. |
| [22] | Kitamura K;Masaki Kobayashi;Koji Hayashi .Microstructural development and properties of new WC-Co base hardmetal prepared from CoxWyCx + C instead of WC[J].Journal of the Japan Society of Powder and Powder Metallurgy,2001,48(7):621-628. |
| [23] | 李志林,朱丽慧.含板状WC晶粒WC-10%Co硬质合金的组织和性能[J].中南大学学报（自然科学版）,2010(02):521-525. |
| [24] | Satoshi Kinoshita;Masaki Kobayashi;Koji Hayashi .High Temperature Strength of WC-Co Base Cemented Carbide Having Highly Oriented Plate-Like Triangular Prismatic WC Grains[J].粉体および粉末冶金,2002(4):299-305. |
| [25] | Masaki Kobayashi;Keiichi Kobari.Progress of plate-like WC grains enhanced cemented carbide[A].Fukuoka,Japan,1999:146-152. |
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%