In order to research the fatigue capability of the railroad wagon coupler yoke,the fatigue comparative tests of No.13（foundry）,No.13B（foundry）,No.16（foundry）,No.17（before-mend,foundry）,No.17（foundry）,No.13B（forging）,No.16（forging） and No.17（forging） were carried out.The research results show that the whole fatigue performance of the forging coupler yoke is superior to the foundry coupler yoke.%为研究铁路货车钩尾框的疲劳性能,对铁路货车13型、13B型、16型、17型（改进前）、17型铸造钩尾框及13B型、16型、17型锻造钩尾框进行了疲劳性能对比研究,初步研究结果表明锻造钩尾框的整体疲劳性能优于铸造钩尾框.
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