低温气体五元共渗质疑——兼与吴成国等同志商榷  

Quering the Validity of "Multi—elements Co—impregnation for HSS W18Cr4V"—— A Discussion with Comrade Wu Chengguo As Well

作　　者：胡以正[1] 单人琨[2] 

机构地区：[1]机电部武汉材料保护研究所 [2]江西大学化学系

出　　处：《材料保护》1989年第8期31-33,3,共3页Materials Protection

摘　　要：B_2O_3的形成自由能远比Fe_2B、FeB的形成自由能低。在氧化性气氛中不可能存在硼原子,不具备渗硼的热力学条件。粘附的硼酸铁并非CBOCeLa“五元”共渗或NCSBO“五元”共渗层的相组成物。对“W18Cr4V低温气体快速CBOR共渗研究”一文的若干原则问题提出了质询。The free energy of formation for B_2O_3 is much lower than those for Fe_2B and FeB. In the oxidizing atmosphere, therefor, there is no thermodynamic condition of forming active boron atoms which is essential for boronizing. The atteched ferric borate can not be any part of the phases of the diffusion layer formed by so called 'CBOR' or 'NCSBO' co—impregnation. Quering the validity of 'Multielements Co—impregnation for HSS W 18Cr4V' has been also made on several importment problems.

关 键 词：形成自由能 氧化性气氛 渗硼 五元共渗 活性硼原子 硼酸铁 相组成物 共渗剂 

分 类 号：TG156.87[金属学及工艺—热处理]