The kinetics and mechanism of multi-component diffusion on AISI 1045 steel
The kinetics and mechanism of multi-component diffusion on AISI 1045 steel
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DOI：
10.1016/s0257-8972(99)00179-6
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发表时间：
1999-07
影响因子：
5.4
通讯作者：
Fan-Shiong Chen;Kuo-liang Wang
中科院分区：
文献类型：
--
作者：
Fan-Shiong Chen;Kuo-liang Wang
采用包埋法研究了硼、铬、铝和硅在AISI 1045钢基体上的多元扩散。工业渗硼粉（Ekabor-3）和Fe-Cr合金粉加NH_4Cl活化剂占30wt%，70wt%的Al_2 O_3作为惰性稀释剂和铝原子的供应源。在1000°C下研究了不同填料组成对涂层结构和成分的变化以及涂层厚度和硬度的影响。反应的动力学，K= K 0 exp（-Q/RT），也已经在这项工作中通过改变NH 4Cl的添加量来确定。结果表明，在900°C ~ 1000°C范围内，Q和K 0随NH 4Cl添加量的增加而降低。
A multi-component diffusion study of boron, chromium, aluminum and silicon on an AISI 1045 steel substrate has been carried out by pack cementation. A commercial boriding powder (Ekabor-3) and an Fe–Cr alloy powder plus NH4Cl activator make up 30wt% of the pack, and 70wt% of Al2O3serves as an inert diluent and supply source of aluminum atoms. The structure and constituent changes of the coated layers and their thickness and hardness, as influenced by different pack compositions, have been investigated at 1000°C. The kinetics of the reaction, K=K0exp(−Q/RT), have also been determined in this work by varying the NH4Cl additions. The results show that Q and K0decrease with increasing amount of NH4Cl addition at temperatures between 900°C and 1000°C.