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对２０ＣＲｒＮｉ２Ｍｏ、１５ＣｒＮｉ６及２０ＣｒＭｎＭｏ渗碳淬火齿轮及１５ＣｒＮｉ６渗碳淬火＋喷丸处理齿轮进行了弯曲疲劳试验，介绍了齿轮试件的设计与加工、试验装置与夹具、试验方法及试验数据的统计处理，试验结果表明，２０ＣｒＮｉ２Ｍｏ和１５ＣｒＮｉ６渗碳淬火齿轮在Ｒ＝０．９９时的σＦｌｉｍ分别为５３０ＭＰａ和３７５ＭＰａ，与２０ＣｒＭｎＭｏ渗碳淬火齿轮相比，弯曲疲劳强度分别提高８０％和２７％。１５ＣｒＮｉ６经渗碳淬火＋喷丸处理齿轮在Ｒ＝０．９９时的σＦｌｉｍ为４９０ＭＰａ，比未喷丸处理者提高３０％。
The bending fatigue tests of 20CRrNi2Mo, 15CrNi6 and 20CrMnMo carburized quenched gears and 15CrNi6 carburized quenched + shot peening gears were introduced. The design and processing of gear samples, the experimental device and fixture, the test methods and the statistical processing of test data were introduced. The experimental results show that the σFlim of 20CrNi2Mo and 15CrNi6 carburized quenched gears are 530MPa and 375MPa at R = 0.99, respectively. Compared with 20CrMnMo carburized and quenched gear, the bending fatigue strength increases by 80% and 27% respectively. The σFlim of 15CrNi6 carburized + shot peening gears at R = 0.99 was 490 MPa, an increase of 30% over the non-shot peening.