Study on Ultrasonic Vermicular Rate Detection Method of Vermicular Graphite Cast Iron
Author of the article:MA Wenjin;YANG Long
Author's Workplace：Sichuan KOCEL Foundry Co.,Ltd.,Ziyang 641300,China
Key Words：vermicular graphite cast iron vermicular rate ultrasonic velocity
Abstract：
The vermicular rate was a critical factor to ensure the mechanical properties and serviceability of vermicular graphite cast iron.Aiming at the difficulty of controlling vermicular rate in mass production of vermicular cast iron,the variation and influence of graphite morphology on material properties parameters in cast iron were analyzed.The results show that the vermicular graphite content in vermicular cast iron is more than 50% when the ultrasonic wave velocity of cast iron is from 5000 to 5350 m/s,which can meet the material requirements of vermicular cast iron standard.The measurement of the wave velocity of the casting or the block connected with the casting can be used as a method to detect the vermiculation rate quickly.This detection method has low cost,good reliability and can effectively guarantee the quality of casting products.
