[1]张聪)张伟彬)彭英彪)陈伟民)周鹏)李娜)程开明)陈利)张利军)刘树红)杜勇)王社权)温光华)谢文).硬质合金相图热力学和扩散动力学数据库及其应用[J].中国材料进展,2015,(1):011-15.[doi:10.7502/j.issn.1674-3962.2015.01.01]
　ZHANG Cong,ZHANG Weibin,PENG Yingbiao,et al.Thermodynamic and diffusion databases for multicomponent cemented carbides and their applications[J].MATERIALS CHINA,2015,(1):011-15.[doi:10.7502/j.issn.1674-3962.2015.01.01]
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硬质合金相图热力学和扩散动力学数据库及其应用()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2015年第1期
页码:
011-15
栏目:
特约研究论文
出版日期:
2015-01-31

文章信息/Info

Title:
Thermodynamic and diffusion databases for multicomponent cemented carbides and their applications
作者:
张聪1; 2)张伟彬1; 2)彭英彪1; 2)陈伟民1; 2)周鹏1; 2)李娜1; 2)程开明1; 2)陈利1; 2)张利军1; 2)刘树红1; 2)杜勇1; 2)王社权3)温光华3)谢文3)

1中南大学粉末冶金国家重点实验室，湖南长沙410083

2中德微结构联合实验室，湖南长沙410083

3株洲钻石切削刀具股份有限公司，湖南株洲412007
Author(s):
ZHANG Cong1; 2;  ZHANG Weibin1; 2;  PENG Yingbiao1; 2;  CHEN Weimin1; 2; ZHOUPeng1; 2;  LI Na1; 2; CHENG Kaiming1; 2; CHEN Li1; 2;  ZHANG Lijun1; 2; LIU Shuhong1; 2;  DU Yong1; 2;  WANG Shequan3;  WEN Guanghua3;  XIE Wen3

1 State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

2 Sino-German Cooperation Group “Microstructure”, Central South University, Changsha 410083, China

3 Zhuzhou Cemented Carbide Cutting Tools Limited Company, Zhuzhou, Hunan 412007, PR China

关键词:
硬质合金; 热力学; 动力学; 数据库; 计算模拟; 应用
DOI:
10.7502/j.issn.1674-3962.2015.01.01
文献标志码:
A
摘要:
硬质合金是由难熔金属化合物和粘结相通过粉末冶金工艺制成的材料，它具有硬度高、耐磨、强度和韧性好、耐热、耐腐蚀等一系列优良性能。本文介绍了包含C?Co?Cr?W?Ta?Ti?Nb?N等元素的硬质合金热力学和动力学数据库。简述了热力学数据库中的热力学模型和优化计算，并以C?Cr?Ta三元系为例介绍了热力学优化计算的方法和步骤。所建立的硬质合金动力学数据库包含液相和fcc相不同元素的原子迁移参数。利用修正的Sutherland方程对液相的原子迁移参数进行了评估，而fcc相原子迁移参数是基于对实验测定数据和文献数据的评估获得的。利用建立的硬质合金热力学和动力学数据库，可以计算多元系的相平衡、获取不同相的热力学性质和溶解度信息、模拟合金中元素和相的分布等。该数据库可用于设计合金成分和烧结温度、预测元素含量及烧结气氛等对梯度硬质合金形成的影响、优化合金烧结工艺等。本文最后指出相图热力学和扩散动力学数据库及热物性数据库结合相场、有限元方法，定量描述硬质合金结构?性能的关系是今后的发展趋势。
Abstract:
Cemented carbides, whichconsist of refractory compounds and binder phase, are produced through powder metallurgy process.They show high hardness, wear resistance, strength with good toughness, heat resistance, corrosion resistance and a series of excellent performance. This paper presents developed thermodynamic and diffusion databases for multicomponent cemented carbides.The databases cover the system C?Co?Cr?W?Ta?Ti?Nb?N.The thermodynamic models and assessments are briefly introduced. The C?Cr?Ta ternary system is shown as an example to describethe procedure of thermodynamic assessment. The diffusion database contains atomic mobility parameters for different diffusing elements in liquid and fcc phases. The atomic mobility parameters in liquid phase are theoretically calculated by the modified Sutherland equation, and atomic mobility parameters in fcc phase are optimized according tothe presently measured diffusivities and the literature data. The developed thermodynamic and diffusion databasescan be used to calculate phase equilibria in multicomponent alloys, simulate the distribution of elements and phases in alloys.Consequently, the databasesare suitable for realizing applications as controlling the alloy composition and sintering temperature, predicting the effect of elements content and sintering atmosphere on the formation of graded cemented carbides, designing and optimizing sintering process for cemented carbides.It is expected that a quantitative description of the relationship between the structure and performancethrougha combination of thermodynamic, diffusion and thermophysical databases with phase field model and finite element method is the main focus for the future development of cemented carbides.
更新日期/Last Update: 2014-12-31