摘要
为了探测煤矿大型机械设备的主要承载部件在煤矿机械制造过程中,因制造工艺、耦合性或生产过程中机械强度、疲劳强度等原因,造成设备内部存在缩孔、夹杂、白点及裂纹等情况,确保机械设备在运行中的人机安全,介绍了超声检测技术中的缺陷定位、定量和定性方法,并着重分析了缺陷定性方法,提出了缺陷的定性需要凭借经验,分析工件的材料、加工工艺、缺陷的特征和缺陷波形以及底波情况等,逐步分析缺陷的性质,并对白点、缩孔、夹杂、疏松和裂纹等缺陷波形进行了直观、细致的描述。为了消除非缺陷波对正确判别缺陷波的影响,分析了迟到波、三角反射波、侧壁干扰波的产生原因、波形特点以及辨识方法。
During the manufacture process of main load-carrying components of the large colliery machinery, the flaws such as shrinkage, inclusion, white spot and crack form inside the components due to manufacture technology, coupling effects, mechanical strength and fatigue strength. In order to detect the flaws so as to ensure the safety of operators and machinery during operation, the paper introduced the ultrasonic testing technology about flaw positioning as well as qualitative and quantitative determination, and focused on the flaw qualitative determination. It also indicated the flaw qualitative determination relied on experience. The flaw qualitative determination was conducted according to the material, manufacture process as well as the features and waveform of the flaws, and the waveforms of the flaws such as white spot, shrinkage, inclusion, porosity and crack were described clearly and meticulously. In order to relieve the influence of the normal waveform on the flaw qualitative determination, the cause, features and determination approach of the delayed wave, triangle reflection wave and side-wall interference wave were analyzed.
出处
《矿山机械》
2017年第1期59-63,共5页
Mining & Processing Equipment
关键词
超声检测
缺陷定性
迟到波
三角反射波
ultrasonic testing
flaw qualitative determination
delayed wave
triangle reflection wave
