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堆焊层厚度的精确测量对于堆焊材料的合理利用有重要意义。本文基于超声测厚原理,在超声波探伤仪和直探头校准的基础上,提出了等离子弧粉末堆焊层厚度测量的数学模型,实现了堆焊层厚度的精确测量。堆焊层厚度的测量分为三个步骤:首先测出母材的厚度;其次测出母材上方堆焊层的厚度;最后从堆焊层的金相照片中测出母材中熔焊层的厚度,从而根据提出的数学模型得到堆焊层的厚度。与游标卡尺测厚相比,该方法简便可行,检测速度快,可大大减轻检测人员的劳动强度。另外,难以采用游标卡尺测量的部位,也可采用本文提出的方法进行测量。
The accurate measurement of overlay thickness is of great significance to the rational utilization of overlay material. Based on the principle of ultrasonic thickness measurement, based on the ultrasonic flaw detector and the straight probe calibration, the mathematical model of the thickness measurement of the plasma arc surfacing layer was proposed, and the accurate measurement of the thickness of the surfacing layer was achieved. The measurement of overlay thickness is divided into three steps: first, the thickness of the base metal is measured; secondly, the thickness of the overlay layer above the base metal is measured; finally, the weld layer of the parent material is detected from the metallographic photograph of the overlay layer The thickness of the overlay layer is obtained according to the proposed mathematical model. Compared with the vernier caliper thickness measurement, this method is simple and feasible, fast detection, which can greatly reduce the labor intensity of the inspectors. In addition, it is difficult to use vernier caliper measurement of the site, the method proposed in this paper can also be measured.