蠕墨铸铁超声波蠕化率检测方法研究  

Study on Ultrasonic Vermicular Rate Detection Method of Vermicular Graphite Cast Iron

作　　者：马文进 阳龙 MA Wenjin;YANG Long(Sichuan KOCEL Foundry Co.,Ltd.,Ziyang 641300,China)

机构地区：[1]四川共享铸造有限公司,四川资阳641300

出　　处：《铸造技术》2020年第8期771-772,共2页Foundry Technology

摘　　要：蠕化率是保证蠕墨铸铁力学性能和使用性能的关键因素。针对蠕墨铸铁铸件批量生产中蠕化率的控制难点,分析了铸铁中石墨形态对材料性能参数的变化和影响。结果表明,当铸铁材质的超声波纵波速度在5 000~5 350 m/s时,蠕墨铸铁中蠕虫状的石墨含量≥50%,能够满足蠕墨铸铁标准的材质要求;利用测量铸件本体或与铸件连体试块的波速,作为蠕化率快速检测的一种方法,可以对蠕化率快速检测。这种检测方法成本低,可靠性好,能够有效保证铸件产品的质量。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.

关 键 词：蠕墨铸铁 蠕化率 超声波波速 

分 类 号：TG251[金属学及工艺—铸造]