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介绍了制造Ｄ级抽油杆的２０ＣｒＭｏ钢材料；叙述了用它来研制耐腐蚀Ｋ级抽油杆的选材依据、研制过程、适用范围及矿场应用。２０ＣｒＭｏ钢与２０Ｎｉ２Ｍｏ钢Ｋ级抽油杆对比表明，用２０ＣｒＭｏ钢代替２０Ｎｉ２Ｍｏ钢不仅降低了材料成本，而且具有优良的技术指标和使用性能
This paper introduces 20CrMo steel used to manufacture D-level sucker rod. The selection basis, development process, application range and mine application of the corrosion-resistant K-sucker rod are described. The comparison between 20CrMo steel and 20Ni2Mo steel K-class sucker rod shows that replacing 20Ni2Mo steel with 20CrMo steel not only reduces the material cost, but also has excellent technical index and performance