Cr5改进型支承辊探伤无底波原因分析  

Why No Bottom Wave Appear during Ultrasonic Test of Improved Cr5 Backup Roll

作　　者：何少龙 曹明[1] 朱明 He Shaolong;Cao Ming;Zhu Ming

机构地区：[1]天津重型装备工程研究有限公司,天津300457 [2]鞍钢集团朝阳钢铁有限公司,辽宁朝阳市122000

出　　处：《一重技术》2021年第5期56-60,共5页CFHI Technology

摘　　要：针对我公司研制的一支Cr5改进型支承辊在锻造热处理后探伤时辊身无底波现象,将无底波范围的辊身解剖,采取金相显微镜观察、扫描电镜观察、能谱检测等手段进行分析,结合该支承辊生产过程,最终确定缺陷为疏松孔隙,为后续工艺改进提供实验数据。In order to find out why no bottom wave is observed during ultrasonic test of an improved Cr5 backup roll forging after heat treatment,the questioned section is cut from the forging and analyzed by means of metallography,SEM and EDS.The analysis also takes the forging process into consideration and confirms it is the porosity defect in the questioned section that causes no bottom wave to appear.This result provides experimental data for subsequent process improvement.

关 键 词：支承辊 无底波 疏松孔隙 

分 类 号：TG115[金属学及工艺—物理冶金]