| 铸态T800合金及其焊层的组织和高温耐磨性能 |
| |
| 引用本文： | 李尚平,骆合力,曹 栩,张喜娥.铸态T800合金及其焊层的组织和高温耐磨性能[J].稀有金属材料与工程,2013,42(3):603-606. |
| |
| 作者姓名： | 李尚平 骆合力 曹 栩 张喜娥 |
| |
| 作者单位： | 钢铁研究总院,北京,100081 |
| |
| 基金项目： | "十一五"军品配套项目 |
| |
| 摘 要： | T800合金是一种优异的高温耐磨材料,广泛应用于涡轮叶冠表面强化。为了考察T800合金应用于涡轮叶冠时的最佳服役状态,对比研究了T800合金铸态及其堆焊层的微观组织、硬度和高温耐微动磨损性能,结果表明,铸态T800合金中Laves相的体积分数高、尺寸大,其硬度和高温耐微动磨损性更加优异。分析认为,在堆焊T800合金铸造焊丝的过程中,焊接基材中的合金元素混合进入了焊接溶池中,对焊层起到稀释作用,Laves相会发生溶解再析出反应,结果导致T800合金焊层中的Laves相体积分数大幅降低、尺寸变小,其硬度和耐磨性明显低于铸态T800合金。
|
| 关 键 词： | T800合金 微观组织 高温耐磨性 铸态 堆焊层 |
| 收稿时间： | 2012/2/15 0:00:00 |
Microstructure and High-Temperature Fretting Wear Behavior of T800 Alloy in Casting and Cladding State |
| |
| Li Shangping
,
Luo Heli
,
Cao Xu
,
Zhang Xi'e.Microstructure and High-Temperature Fretting Wear Behavior of T800 Alloy in Casting and Cladding State[J].Rare Metal Materials and Engineering,2013,42(3):603-606. |
| |
| Authors: | Li Shangping Luo Heli Cao Xu Zhang Xi'e |
| |
| Affiliation: | Central Iron & Steel Research Institute, Beijing 100081, China |
| |
| Abstract: | T800 alloy is a good wear-resistant coating material for tip shrouds of turbine blades operated at high temperature. In order to make clear the best serving state of T800 alloy, microstructure and high-temperature fretting wear behavior of T800 alloy in casting and cladding state were studied. During welding, alloying elements of K417G alloy substrate diffused into welding melting pool, which resulted in that there was a decrease in the alloying elements of the T800 clad. Laves phases were dissolved completely and then precipitated to form fine Laves phases in matrix during solidification. As a result, as-cast T800 possessed larger volume fraction and size of Laves phases, higher hardness and high-temperature fretting wear resistance than T800 cladding |
| |
| Keywords: | T800 alloy microstructure high-temperature fretting wear casting cladding |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
