直流电场增强粉末渗硼特性研究  

Characteristics of Pack Boriding Catalyzed by Direct Current Field

作　　者：孙力[1] 谢飞[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164

出　　处：《热处理》2012年第1期38-42,共5页Heat Treatment

摘　　要：将20钢和45钢试样置于渗罐中平行的板状正负电极上及靠近和远离电极的部位,并施加一直流电场,以研究800℃时直流电场在粉末渗硼中的作用。试验结果表明,直流电场对渗罐内不同位置试样及同一试样的不同部位的渗硼作用不同,远离电极的试样渗硼速度比常规渗硼的还要低;从正极到负极,直流电场的促渗作用逐渐增强,直流电场促进试样渗硼的作用主要表现于面向正极的试样面。这种结果是由直流电场对渗硼过程中渗剂的化学反应、含硼活性基团及硼的扩散的影响所决定的。Pack boriding catalyzed by direct current field（DCF） was carried out by placing 20 steel and 45 steel specimens at paralled plate-shaped anode and cathode,close to and far from them in a sealed metal container at 800 ℃ filled with boriding agent and by applying DCF to reveal the effect of DCF on the pack boriding.The experimental results indicate that effect of DCF on boriding varies with the locations of specimens in the container and the potions of the same specimen,and that boriding rate of specimens far from electrodes is even lower than that of conventional boriding.DCF catalyzing specimen borided intensifies progressively from anode to cathode,and is mainly effective for the specimen surface facing the anode.The above results can be explained by the influences of DCF on chemical reaction in the boriding agent and on diffusion of both active boron-containing substance and boron. KEY WRODS：pack boriding;direct current field;microstructure

关 键 词：粉末渗硼 直流电场 显微组织 

分 类 号：TG156.87[金属学及工艺—热处理]