摘要
对硬质合金渗碳时碳原子在粘结相钴中的扩散系数进行了研究,假定C与O、N等非金属扩散原子在液态金属中的扩散具有相似之处,导出了一个求算碳原子在液态金属钴中的扩散系数方程式(DAB=D0(dB/dA)exp[-0.17Tm(16+K0)/T])。式中:D0为液态金属自扩散ARRHENIUS方程的频率因子,dB和dA分别为溶剂金属原子和扩散原子的直径,Tm为金属的熔点温度,K0为溶剂金属原子的价态,T为扩散温度。)该方程适用于碳及其它非金属扩散原子在液态金属中的扩散系数计算,经与实测结果对比,证明其计算结果与实测结果具有较好的一致性。
Diffusion coefficient of C in Co binder phase is investigated. Supposing C is similar to non-metallic atoms, for example O and N, a diffusion equation for calculating the diffusion coefficent of nonmetal atoms such as C in liquid metallic cobalt is derived as DAB=D0（dB/dA exp[-0.17Tm（16＋K0）/T], where, D0-Frequency factor, dB-Atomic diameter of solvent metal, dA-Diameter of diffused atom, Tin-Melting temperature, T-Diffusion temperature, K0-Atomic value of solvent metal. Comparison with experimental data identifies that the calculated data gained from the proposed equation are consistent with those determined by experiments rather good.
出处
《粉末冶金材料科学与工程》
EI
2007年第2期82-86,共5页
Materials Science and Engineering of Powder Metallurgy
关键词
硬质合金
碳
粘结相
扩散系数
cemented carbide
carbon
binder phase
diffusion coefficient
作者简介
通讯作者：羊建高，电话：0797-3819889；E-mail：zyyjg@zy-tungsten．com
