ULTRASONIC-DETECTION OF MICROSTRUCTURE CHANGES IN CAST-IRON

被引:8
|
作者
ORLOWICZ, W
OPIEKUN, Z
机构
[1] Institute of Mechanical Engineering, Rzeszów University of Technology, 35-395 Rzeszow
关键词
Cast iron;
D O I
10.1016/0167-8442(94)00043-Z
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Ultrasonic waves are monitored to detect the microstructure changes in cast iron. Specimens are made from nonalloyed spheroidal graphite cast iron (before and after heat treatment), eutectoid carbon steel (0.8% C), and ingot iron. The ultrasonic longitudinal wave speed increased with increase in the graphite shape factor, pearlite volume fraction, specific length of grain boundaries and cementite-ferrite interface boundaries. Decrease in the wave speed corresponds to increase in the graphite volume fraction, graphite precipitates and austenitizing temperature and time.
引用
收藏
页码:9 / 16
页数:8
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