(太原理工大学表面工程研究所，太原 030024)
摘 要: 利用双层辉光离子渗金属技术在工业纯铁表面形成高钴的Fe-Co-W-Mo型表面时效硬化合金。研究表明，这种表面合金具有时效硬化迅速、硬化能力强和抗回火软化能力强的特点。合金经1240℃固溶处理后于540℃时效5min，硬度就从固溶态的500HV0.2左 右上升到750HV0.2；时效40min，硬度上升到1200 HV0.2左右；于700℃回火2h，表层硬度仍保持720HV0.2以上。
关键字: 双辉技术；表面合金；时效硬化
（Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, P.R.China）
Abstract:A surface age-hardening alloy of Fe-Co-W-Mo was formed on the surface of ingot iron by the double glow plasma surface alloying technique (DGPSA). The experimental results showed that the surface age-hardening alloy possesses a very high rate of age-hardening, a very strong ability of age-hardening and a very strong ability against temper softening. The hardness of the surface age-hardening alloy is increased from 500 HV0.2 to 750HV0.2 after solution treatment followed by ageing for 5min at 540℃, increased to 1200HV0.2 after ageing for 40min in case of holding on the other heat treatment states above. And also the hardness of the surface age-hardening alloy exceeds 720HV0.2 after tempering for 2 h at 700℃.
Key words: double glow plasma surface alloying; surface ageing-alloy; age hardening
