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公开(公告)号:US20150107072A1
公开(公告)日:2015-04-23
申请号:US14059528
申请日:2013-10-22
CPC分类号: F16B33/06 , B23P9/02 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/02 , C21D7/08 , C21D9/0093 , C22C19/055 , C22C19/056 , F01D5/066 , Y10T29/47
摘要: A fatigue resistant turbine through bolt formed from a base material covered by a first surface modification and a second surface modification is disclosed. The first surface modification may be in contact with the base material and, in at least one embodiment, may be a low plasticity burnished layer that increases the residual compressive stresses on an outer surface of the turbine through bolt. The second surface modification may cover the first surface modification and, in at least one embodiment, may be a spinel oxide layer on the low plasticity burnished layer. The second surface modification may be positioned on the first surface modification or on the bare turbine through bolt contact surface without low plastiocity burnishing on the shaft of the turbine through bolt. The first and second surface modifications reduce the likelihood of fretting fatigue failures.
摘要翻译: 公开了一种由基材覆盖的第一表面改性和第二表面改性形成的耐疲劳涡轮机通过螺栓。 第一表面改性可以与基材接触,并且在至少一个实施方案中可以是低塑性抛光层,其通过螺栓增加涡轮机的外表面上的残余压应力。 第二表面改性可以覆盖第一表面改性,并且在至少一个实施方案中可以是低塑性抛光层上的尖晶石氧化物层。 第二表面改性可以通过螺栓接触表面定位在第一表面改性或裸露的涡轮机上,而不会通过螺栓在涡轮轴上的低塑性抛光。 第一和第二表面修改减少了疲劳疲劳失效的可能性。