大锻件超声波检测中草状波缺陷的形成原因  

CAUSES OF GRASS WAVE DEFECTS IN ULTRASONIC TESTING OF LARGE FORGINGS

作　　者：王宣 王倩[2] 梅帅飞 陈嘉惠 刘静静 苏孺 Wang Xuan;Wang Qian;Mei Shuaifei;Chen Jiahui;Liu Jingjing;Su Ru(School of Science and Technology, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei;School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei;Heye Technology Co., Ltd., Shijiazhuang 052165, Hebei)

机构地区：[1]河北科技大学理工学院,河北石家庄050018 [2]河北科技大学材料科学与工程学院,河北石家庄050018 [3]河冶科技股份有限公司,河北石家庄052165

出　　处：《河北冶金》2021年第11期42-46,共5页Hebei Metallurgy

基　　金：2020年河北省重点研究项目(JMRH2020-27);河北省省级科技计划资助(20311007D);河北省高等学校科学技术研究项目青年基金(QN2020175);河北科技大学理工学院大学生创新创业训练计划项目(S202013409006)。

摘　　要：利用EBSD金相显微镜对正火后的HYRH12试样进行了组织观察,分析了超声波检测过程中草状波缺陷产生的原因。认为,HYRH12中的草状波缺陷是由粗晶产生的,粗大晶粒的边界可以成为超声波的反射体,进而产生草状波缺陷;二次正火处理后,草状波缺陷的合格率明显高于一次正火之后。研究结果证明,可以通过多次正火获得细小的晶粒从而消除草状波缺陷。The microstructure of normalized HYRH12 sample was observed by EBSD metallographic microscope,and the causes of grass wave defects in ultrasonic testing were analyzed.It is considered that the grass wave defect in HYRH12 is produced by coarse grains,and the boundary of coarse grains can become a reflector of ultrasonic wave,resulting in grass wave defect;the qualified rate of grass wave defect after secondary normalizing is significantly higher than that after primary normalizing.The results show that fine grains can be obtained by multiple normalizing,so as to eliminate grass wave defects.

关 键 词：大型锻件 草状波缺陷 粗晶 超声波探伤 正火 

分 类 号：TG142.1[一般工业技术—材料科学与工程]