渗硼过程的热力学分析  

Thermodynamic Analysis in Boronizing Process

作　　者：宋云京[1] 石文华[1] 冯承明[2] 

机构地区：[1]山东电力研究院,山东济南250002 [2]山东农业大学,山东泰安270018

出　　处：《山东电力技术》2003年第4期11-13,共3页Shandong Electric Power

摘　　要：通过对渗硼过程中的热力学分析 ,得出渗硼过程中硼进入钢表面形成渗层的主要反应机理 :渗剂中的Na2 B4 O7、Na2 SiF6 和Si-Ca -Fe通过高温反应形成BF3,BF3在还原剂的作用下变成亚稳态BF2 或BF ,BF2 或BF被钢表面吸附后与铁原子形成FeB或Fe2Boronizing mechanism is studied in this paper by thermodynamic calculations. The main processes are as followes: BF 3 is obtained through a series of reactions among Na 2SiF 6 、Na 2B 4O 7 and Si-Ca-Fe, then BF 3 turned into BF or BF 2 under the help of reducing agent. The boronizing layer is formed after the BF or BF 2 is absorbed by the steel surface.

关 键 词：金属表面保护工艺 渗硼过程 热力学分析 钢件表面 

分 类 号：TG156.87[金属学及工艺—热处理]