理化检验-物理分册2023，Vol.59Issue(12)：34-36,43,4.DOI:10.11973/lhjy-wl202312008
4130钢锻件超声检测不合格原因
Causes of unqualified ultrasonic testing of 4130 steel forgings
黄鑫 1马苏 1卞继杨1
作者信息
- 1. 张家港中环海陆高端装备股份有限公司, 张家港 215600
- 折叠
摘要
Abstract
The ultrasonic testing results of a batch of 4130 steel forgings did not meet the requirements of JB/T 5000.15-2007 standard.There were dense and single excessive defects in the center of the forging steel.The chemical composition analysis,macroscopic test,metallographic examination,scanning electron microscopy and energy spectrum analysis were used to analyze the location of the defects.The results show that there were a large number of MnS and NbC inclusions in the raw materials of 4130 steel forgings.These inclusions divided the matrix continuity of the steel itself,and cracks were formed during the forging process,resulting in unqualified ultrasonic testing results.Finally,the source and harmfulness of MnS and NbC inclusions were analyzed,and the corresponding process improvement measures were found out.The qualified rate of ultrasonic testing of 4130 steel forgings after improvement was 100%.关键词
4130钢锻件/夹杂物/超声波检测/低倍检验/金相检验Key words
4130 steel forging/inclusion/ultrasonic testing/macroscopic test/metallographic examination分类
通用工业技术引用本文复制引用
黄鑫,马苏,卞继杨..4130钢锻件超声检测不合格原因[J].理化检验-物理分册,2023,59(12):34-36,43,4.
