等离子共渗W-Mo-Y工艺及渗层组织的研究  

Research on Plasma W-Mo-Y Co-diffusion Technique and Microstructure of Alloying Layer

作　　者：李冰[1] 高原[1] 陈选楠[1] 黄学锋[1] 赖涛[1] 陈文琦[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,桂林541004

出　　处：《表面技术》2011年第1期86-89,共4页Surface Technology

基　　金：国家自然科学基金(50764002);广西省基金重点项目(2010GXNSFD013008);信息材料广西重点实验室主任研究项目(桂科能0710908-06-Z)

摘　　要：采用辉光等离子渗金属技术对Q235钢进行W-Mo-Y三元共渗,探讨了极间距、气压、保温时间、温度对共渗层厚度的影响,并分析了共渗层的金相显微组织、合金元素分布及物相组成。结果表明:在试验涉及的条件下,以极间距25 mm,气压30 Pa,保温时间3 h,温度1 000℃为最佳工艺参数;共渗层主要由Fe3Mo,Fe(Mo,W,Y),Fe17Y2等组成,组织为柱状晶,W和Mo的含量由表及里逐渐减少,而Y元素由于在晶界处发生偏聚而分布不均匀。Q235 steel was conducted by W-Mo-Y multi-elements alloying using plasma alloying technique.The effects of inter-electrode distance,pressure,holding time and temperature on the thickness of alloying layer were studied.And the microstructure,the distribution of elements and the phase of alloying layer were analyzed.Results show that： the optimum technological parameters in this experiment are as follows： inter-electrode distance 25 mm,pressure 30 Pa,holding time 3 h,temperature 1 000 ℃;The phase of alloying layer are mainly Fe（W,Mo,Y）,Fe3Mo and Fe17Y2;The microstructure of alloying layer is columnar crystal;W,Mo contents decrease from the outside to the inside;Element Y is in uneven distribution.This is because the solid solubility of Y is very small,thus Y segregates at grain boundaries.

关 键 词：等离子渗金属 W-Mo-Y共渗 Q235钢 

分 类 号：TG174.445[金属学及工艺—金属表面处理]