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针对我国各抽油杆生产厂在Ｄ级抽油杆喷丸工艺中多注重除锈效果，而较少关注喷丸强化对提高疲劳极限作用的现状，研究了Ｄ级抽油杆喷丸强化的最佳工艺。结果表明，在其他喷丸参数相近时，表下残余压应力的深度主要取决于丸粒大小；在丸粒尺寸相同时，表下最大残余压应力的最大值取决于Ａｌｍｅｎ试片的弧高度。新的喷丸强化工艺可使现有Ｄ级抽油杆杆身的疲劳极限由４３５ＭＰａ提高到５３５－５６５ＭＰａ，大大超过美国Ｄ级抽油杆的疲劳极限４５０ＭＰａ。
In view of the fact that the sucker rod manufacturers in our country pay more attention to the derusting effect in the D-level sucker rod shot peening process and pay less attention to the effect of the shot peening on the fatigue limit, the effects of the D grade sucker rod shot peening The best technology. The results show that the depth of residual compressive stress is mainly determined by the size of pellet when the other parameters of shot peening are similar. The maximum residual compressive stress under the same pellet size depends on the arc height of Almen specimen. The new shot peening process allows the fatigue limit of the existing D-class sucker rod to be increased from 435 MPa to 535-565 MPa, significantly exceeding the fatigue limit of 450 MPa for U.S. Class D sucker rods.