Cavitation erosion behavior of austempered ductile irons of increasing hardness

被引：12

作者：

Abreu, Marcio ^{[1
,2
]}

Elfsberg, Jessica ^{[2
]}

Jonsson, Stefan ^{[1
]}

机构：

[1] KTH Royal Inst Technol, Mat Sci & Engn, SE-10044 Stockholm, Sweden

[2] Scania CV AB, Mat Technol, SE-15187 Sodertalje, Sweden

来源：

WEAR | 2021年 / 484卷

关键词：

Cavitation erosion; Austempered ductile iron; Graphite nodule; GRAY CAST-IRON; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE; KINETICS;

D O I：

10.1016/j.wear.2021.204036

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The cavitation erosion mechanisms of three austempered ductile irons (ADIs) of 279, 333 and 469 Brinell hardness in a heavy-duty engine coolant at 82 degrees C were described. Sample weight was measured in 14 time steps up to 4 h and complemented by image sequences showing surface damage evolution in detail. A rapid mass loss during the first 1.5 min was attributed to surface graphite erosion, with complete nodule removal within 5 min in all ADIs. Matrix erosion became steady after 30 min, but differed in severity between ADIs, with relative mass loss rates of 4.3 : 1.5 : 1 for ADIs of low, medium and high hardness, respectively.

引用

页数：8