Preliminary communication

The effect of austenitizing conditions in the ductile iron hardening process on longitudinal ultrasonic wave velocity

A. W. Orłowicz ; Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland
M. Tupaj ; Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

Abstract

The paper presents results of a research on the effect of austenitizing temperature and time adopted in the hardening operation on the ultrasonic wave velocity in ductile iron. It has been found that with increasing austenitizing temperature and with the passage of the austenitizing time, a monotonic decrease of the ultrasonic longitudinal wave velocity value occurred. Implementation of ultrasonic testing of results obtained in the course of the cast iron hardening process both in production and as-cast conditions, requires development of a test methodology that must take into account the influence of base material structure (degree of nodularization, graphite precipitation count) on the ultrasound wave velocity.

Keywords

ductile cast iron; austenitizing temperature; austenitizing time; hardening; ultrasonic testing

Hrčak ID:

110073

URI

https://hrcak.srce.hr/110073

Publication date:

1.4.2014.

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