预处理工艺对放电等离子烧结超细晶WC-Co硬质合金组织和性能的影响

稀有金属材料与工程, 2010, 39(5): 896-901.

预处理工艺对放电等离子烧结超细晶WC-Co硬质合金组织和性能的影响

赵世贤 ^1, , 宋晓艳 ^2, , 王明胜 ^3, , 魏崇斌 ^4, , 刘雪梅 ^5, , 张久兴 ^6,

1.北京工业大学,教育部新型功能材料重点实验室,北京,100124

2.北京工业大学,教育部新型功能材料重点实验室,北京,100124

3.北京工业大学,教育部新型功能材料重点实验室,北京,100124

4.北京工业大学,教育部新型功能材料重点实验室,北京,100124

5.北京工业大学,教育部新型功能材料重点实验室,北京,100124

6.北京工业大学,教育部新型功能材料重点实验室,北京,100124

基金项目: 北京特色新材料产业关键技术研发攻关类项目(Z08000003220000) 国家自然科学基金(50671001;50871001) 教育部博士点基金(20070005010) 教育部新世纪优秀人才项目(NCET2006)

关键词：超细晶硬质合金 , 放电等离子烧结 , 真空预处理 , 强度

Effect of Pretreatment on Microstructure and Properties of Ultrafine WC-Co Cermets by Spark Plasma Sintering

采用不同粒度的WC粉与超细Co粉混合得到初始粉末,利用直接放电等离子烧结(SPS)技术和一种包括真空预处理和SPS烧结的新制备方法,研制超细晶WC-Co硬质合金块体.结果表明,两种不同粒度匹配的混合粉末经真空预处理后SPS烧结得到的试样较直接SPS烧结试样的硬度稍有降低,但断裂韧性得到提高,尤其是抗拉强度得到显著提高.对试样显微组织和性能分析表明,混合粉末的真空预处理工艺对SPS烧结WC-Co硬质合金具有重要作用:去除混合粉末吸附气体,消除Co池,同时保证WC晶粒不发生明显长大.

参考文献

[1]	El-Eskandarany M S;Mahday A A;Ahmed H A et al.[J].Journal of Alloys and Compounds,2000,312:315.
[2]	Parasiris A.;Hartwig K.T. .Consolidation of advanced WC-Co powders[J].International Journal of Refractory Metals & Hard Materials,2000(1):23-31.
[3]	Sanchez J M;Ordonez A;Gonzalez R .[J].International Journal of Refractory Metals and Hard Materials,2005,23:193.
[4]	Kim H C;Oh D Y;Shon I J .[J].International Journal of Refractory Metals and Hard Materials,2004,22:197.
[5]	Shi X L;Shao G Q;Duan X L et al.[J].Materials Characterization,2006,57:358.
[6]	Breval E;Cheng JP;Agrawal DK;Gigl P;Dennis A;Roy R;Papworth AJ .Comparison between microwave and conventional sintering of WC/Co composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):285-295.
[7]	Michalski A;Siemiaszko D .[J].International Journal of Refractory Metals and Hard Materials,2007,25:153.
[8]	Huang S G;Li L;Vanmeensel K et al.[J].International Journal of Refractory Metals and Hard Materials,2007,25:417.
[9]	Huang B;Chen L D;Bai S Q .[J].Scripta Materialia,2006,54:441.
[10]	Kangwantrakool S;Shinohara K .[J].International Journal of Refractory Metals and Hard Materials,2003,21:171.
[11]	Zhang F M;Shen J;Sun J F .[J].Journal of Alloys and Compounds,2004,385:96.
[12]	Cha SI.;Hong SH.;Kim BK. .Spark plasma sintering behavior of nanocrystalline WC-10Co cemented carbide powders[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):31-38.
[13]	Sivaprahasam D;Chandrasekar S B;Sundaresan R .[J].International Journal of Refractory Metals and Hard Materials,2007,25:144.
[14]	Jia C C;Tang H;Mei X Z et al.[J].Materials Letters,2005,59:2566.
[15]	Shi XL;Shao GQ;Duan XL;Yuan RZ;Lin HH .Mechanical properties, phases and microstructure of ultrafine hardmetals prepared by WC-6.29Co nanocrystalline composite powder[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):335-339.
[16]	Zhao SX;Song XY;Zhang JX;Liu XM .Effects of scale combination and contact condition of raw powders on SPS sintered near-nanocrystalline WC-Co alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):323-329.
[17]	Fang Z;Maheshwari P;Wang X et al.[J].International Journal of Refractory Metals and Hard Materials,2005,23:249.

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