喷丸预处理对Ti6Al4V合金低温等离子体氮化的影响  

Effect of Shot Peening Pretreatment on Low Temperature Plasma Nitriding of Ti6Al4V Alloy

作　　者：刘珍 于首明 刘道新[1] 史海兰 何光宇[3] Liu Zhen;Yu Shouming;Liu Daoxin;Shi Hailan;He Guangyu(School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China;School of Material Science and Engineering,Xi'an University of Technology,Xi'an 710048,China;Aeronautic Engineering Institute,Air Force Engineering University,Xi'an 710038,China)

机构地区：[1]西北工业大学航空学院,陕西西安710072 [2]西安理工大学材料科学与工程学院,陕西西安710048 [3]中国人民解放军空军工程大学航空航天工程学院,陕西西安710038

出　　处：《稀有金属材料与工程》2021年第10期3462-3469,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51771155);National Science and Technology Major Project(2017-VII-0012-0107)。

摘　　要：为改善钛合金表面耐磨性能,同时达到防止薄壁零部件变形和节约能源的目的,以Ti6Al4V钛合金为对象,研究了喷丸强化预处理对钛合金低温渗氮层及耐磨性的改善作用。结果表明,喷丸强化预处理能够有效促进钛合金表面低温离子渗氮过程,在500℃低温渗氮试验条件下,随着喷丸预处理强度的增大,钛合金渗氮效率逐步提高,渗氮层的表面硬度、承载能力和表观韧性逐步增加,使得渗氮层的耐磨性能逐步提高。当喷丸预处理强度增加到0.25 mmA时,Ti6Al4V钛合金渗氮层的表面硬度比单纯渗氮处理试样提高32.7%,磨损率降低42.3%,使钛合金基体的磨损率降低705%,较好地实现了喷丸预处理促进钛合金低温离子渗氮的目标。In order to improve the wear resistance of titanium alloy,and to prevent the deformation of thin-walled components,taking Ti6 A14 V alloy as the object,the effect of shot peening pretreatment on the low-temperature nitriding of titanium alloy was studied.The results show that the pretreatment of shot peening(SP)can effectively promote the plasma nitriding process at low temperature.Under the test conditions of 500℃,with the increase of shot peening strength nitriding efficiency of pretreated samples increases gradually,and the surface hardness,load-bearing capacity and the wear resistance of nitrided layer increase gradually.Compared with unpretreated nitrided samples(Ti6 A14 V-PN),when the shot strength increases to 0.25 mmA,the surface hardness of the pretreated nitrided samples(SP(0.25)-PN)increases by 32.7%and the wear rate decreases by 42.3%.The goal of shot peening pretreatment to promote low-temperature plasma nitriding of Ti6 A14 V alloy is well achieved.

关 键 词：TI6AL4V钛合金 喷丸强化 低温氮化 摩擦磨损 

分 类 号：TG668[金属学及工艺—金属切削加工及机床] TG146.23[一般工业技术—材料科学与工程]