...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Fatigue >Effect of electroless nickel interlayer on the fatigue strength of chromium electroplated AISI 4340 steel
【24h】

Effect of electroless nickel interlayer on the fatigue strength of chromium electroplated AISI 4340 steel

机译：化学镀镍中间层对镀铬AISI 4340钢疲劳强度的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Deposition of wear-resistant hard chromium plating leads to a decrease in the fatigue strength of the base material. Despite the effective protection against wear and corrosion, fatigue life and environmental requirements result in pressure to identify alternatives or to improve conventional chromium electroplating mechanical characteristics. An interesting, environmentally safer and cleaner alternative for the replacement of hard chrome plating is tungsten carbide thermal spray coating, applied by high velocity oxyfuel (HVOF) process.rnTo improve the fatigue strength of aeronautical steel chromium electroplated, shot peening is a successfully used method. Multiple layer systems of coatings are considered to have larger resistance to crack propagation in comparison with simple layer.rnThe aim of this study was to analyze the effect of nickel underplate on the fatigue strength of hard chromium plated AISI 4340 steel in two mechanical conditions: HRc 39 and HRc 52.rnRotating bending fatigue tests results indicate that the electroless nickel plating underlayer is responsible for the increase in fatigue strength of AISI 4340 steel chromium electroplated. This behavior may be attributed to the largest toughness/ductility and compressive residual stresses which, probably, arrested or delayed the microcrack propagation from the hard chromium external layer. The compressive residual stress field (CRSF) induced by the electroplating process was determined by X-ray diffraction method. The evolution of fatigue strength compressive residual stress field CRSF and crack sources are discussed and analyzed by SEM.
机译：耐磨硬铬镀层的沉积导致基材的疲劳强度降低。尽管有效地防止了磨损和腐蚀，但是疲劳寿命和环境要求导致需要寻找替代品或改善常规铬电镀机械性能的压力。替代硬铬镀层的一种有趣，对环境更安全，更清洁的替代方法是碳化钨热喷涂涂层，该涂层采用高速氧燃料（HVOF）工艺施涂。为了提高电镀航空铬钢的疲劳强度，喷丸处理是一种成功使用的方法。 。与简单层相比，多层涂层系统被认为具有更大的抗裂纹扩展能力。本研究的目的是分析镍底板对两种机械条件下硬质镀铬AISI 4340钢疲劳强度的影响： 39和HRc 52.旋转弯曲疲劳试验结果表明，化学镀镍底层是电镀AISI 4340钢铬的疲劳强度增加的原因。此行为可归因于最大的韧性/延展性和压缩残余应力，这些应力可能会阻止或延迟微裂纹从硬铬外层的扩散。用X射线衍射法测定了电镀过程中产生的压缩残余应力场（CRSF）。用SEM讨论并分析了疲劳强度压缩残余应力场CRSF和裂纹源的演变。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号