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研究了低温硼－碳－氮－稀土（Ｂ－Ｃ－Ｎ－ＲＥ）共渗工艺及共渗层的组织性能，并与硼－碳－氮（Ｂ－Ｃ－Ｎ）共渗工艺及共渗层的组织性能进行了比较，结果表明，低温共渗的硼化物层由ＦｅＢ、Ｆｅ２Ｂ、Ｆｅ３（Ｃ，Ｂ）等相组成，硼化物层的前沿无过渡区，ＦｅＢ和Ｆｅ２Ｂ生长过程中排挤出来的碳没有发生远程扩散，而是就近形成Ｆｅ３（Ｃ，Ｂ）等形式的硼化物。稀土加入量适当时，具有明显的催渗作用；与Ｂ－Ｃ－Ｎ共渗相比，Ｂ－Ｃ－Ｎ－ＲＥ共渗层的耐磨性和耐蚀性明显提高。对Ｂ－Ｃ－Ｎ－ＲＥ共渗的机理及稀土元素的作用作了初步的探讨。
The microstructure and mechanical properties of B-C-N-RE co-infiltration process and co-infiltrated layer were studied. The microstructure and properties of B-C-N-RE co-infiltration process and co-infiltration were studied. The results show that the low temperature co-infiltration boride layer is composed of FeB, Fe2B, Fe3 (C, B) and other phases. The frontier of the boride layer has no transition zone and the FeB and Fe2B are squeezed out during growth Of the carbon does not occur remote diffusion, but the formation of Fe3 (C, B) and other forms of boride. When the amount of rare earth added is appropriate, it has obvious catalysis effect. Compared with B-C-N co-permeation, the wear resistance and corrosion resistance of B-C-N-RE co-permeation layer obviously increase. The mechanism of B-C-N-RE co-infiltration and the effect of rare earth elements were discussed.