电沉积Fe-P非晶镀层的受热转变  

Transformation of electrodeposited Fe-P amorphous coatings during process of heat-treatment

作　　者：范云鹰[1] 张英杰[1] 罗少林[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《材料热处理学报》2008年第4期140-142,共3页Transactions of Materials and Heat Treatment

基　　金：昆明理工大学科学研究启动基金(2006校引-7)

摘　　要：采用电沉积工艺制备了Fe-P非晶镀层,并研究了Fe-P非晶镀层在加热过程中镀层结构与硬度的变化趋势,结果表明:该镀层在300℃左右开始晶化,在330℃左右Fe-P合金开始转变为-αFe(P)固溶体,到370℃左右铁磷化合物FexP(x=1,2,3)从α-Fe(P)固溶体中脱溶析出,由于固溶强化和弥散强化的作用导致镀层硬度增大,并在370℃达到最大值,当热处理温度继续增高至460℃后,镀层中弥散相粒子逐渐长大,即发生Ostwald熟化现象,从而导致镀层硬度快速下降。Fe-P amorphous coatings were prepared by electrodeposition, and the transformation of structure and hardness of the coatings after heattreatment at different temperatures were investigated. The results show that Fe-P amorphous coating begins to crystallize when heated at 300℃, α- Fe（P） solid solution appears when heated at 330℃, and Fe, P（ x = 1,2,3） compound separates out from the solid solution when heat-treatment temperature is up to 370℃. During the process of heat-treatment, hardness of the Fe-P coatings increases due to strengthening of solid solution and dispersed phase in the coatings, and the hardness reaches the maximum at 370℃. When heat-treatment temperature is higher than 460℃, dispersed phase in the coatings grows up, which is called Ostwald coarsening phenomenon, and hardness of the coating decreases quickly.

关 键 词：Fe-P非晶镀层 转变 热处理 结构 硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TQ153.2[金属学及工艺—金属学]