抽油杆表面缺陷及裂纹分析

Analysis of Surface Defects and Cracks on Sucker Rods.

根据抽油杆锻造表面缺陷检测和实物疲劳试验，分析了抽油杆各部位的表面缺陷形态及表面裂纹形态。为抽油杆锻造质量评定和疲劳寿命预测提供了裂纹模型。指出抽油杆表面缺陷主要是锻造皱褶所引起的微小裂纹，尽快改进锻造成型工艺，减少这种微小裂纹，是抽油杆生产厂应予重视和解决的问题。

According to the inspection of the surface forge-defects of a sucker rod and the fatigue test of the rod, the authors analyze the shapes of surface defects and cracks on each part of the rod, provide crack patterns for assessing the forging quality of the rod and predicting its fatigue life, and point out that the primary surface defect on the rod are the minicracks caused by forging creases, which should be avoided as far as possible by improving the forging technique.