摘要
采用数控等离子束专用机床与自制的电流调控装置，对汽缸套工作面进行等耐磨硬化处理试验研究。工作电流60～90A，随着扫描行程与电流的增大，硬化层的深度、宽度以及硬度均呈直线上升，奥氏体化程度更为充分，马氏体含量逐渐增加，残余奥氏体含量逐渐减少。结果表明：汽缸套内表面经等离子束扫描后，实现自淬火，获得了高硬度的隐针马氏体组织；装机测试试验表明，原硼铸铁汽缸套上下部磨损量相差较大，磨损量也大；双层网格等离子束硬化的硼铸铁汽缸套各部位的磨损量几乎相等，其磨损量是原硼铸铁汽缸套磨损量的1／3。
Using CNC machine tools and home made ion beam current control device processing experiment of the same hardening wear of cylinder liner＇s working face. We found that when working current between 60 and 90 A, with the scanning schedule and current increases, the hardened layer depth, width and hardness botn showed a linear in- crease, degree of austenitizing being more sufficient. Content of martensite gradually increased, content of retained aus tenite gradually decreased. The results show that after plasma beam scan, the inner surface of cylinder liner realizes since quenching and acquires high hardness of hidden needle martensite organization. Installed capacity test shows that the wear of original cast iron cylinder liners＂ top and bottom quite differentlly, the wear is also enlarge; However, the wear of double layer grid plasma beam hardening cast iron cylinder liners＂ different part almost eaqully, whrich only 1/3 of the original cast iron cylinder liners.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2011年第4期104-107,共4页
Surface Technology
关键词
汽缸套
等离子束
电流
深度
宽度
硬度
残余奥氏体
cylinder liner
plasma beam
current
depth
width
hardness
retained austenite
