Abstract Effects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steels
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steels
【24h】

Effects of preheating and carbon dilution on material characteristics of laser-cladded hypereutectoid rail steels

机译：预热和碳稀释对激光熔覆超共析钢轨钢材料性能的影响

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

AbstractThe impacts of preheating conditions and carbon dilution on the microstructural and mechanical properties of laser cladded rails using single and double cladding layers have been investigated for a hypereutectoid steel grades typically used under heavy haul conditions. The microstructures in the HAZ showed that formation of martensite, which has a detrimental effect on behaviour in wheel-rail contact, was successfully inhibited by increasing the length of the preheated region using a preheating temperature of 350°C. Dilution of carbon from the hypereutectoid substrate was observed and its effect on the microstructures of the 410L ferritic stainless-steel deposits was investigated. The formation of ferrite in the 410L cladding layers was attributed to the very low carbon content, and no carbide formation was observed on boundaries of the ferritic grains. The thickness of dilution band was determined to be approximately equal to the thickness of the first cladding layer. Texture measurement obtained by EBSD showed a random trend owing to the formation of martensite in diluted bands. Strong solidification fibre texture was developed for double deposition, particularly in the second deposit. Mechanical characterization of the 410L deposits undertaken in terms of Vickers microhardness, shear and tensile yield strengths, and ultimate tensile and shear strengths were correlated with the observed microstructural morphologies.
机译： 摘要 对于采用单层和双层熔覆层的超共析钢，已经研究了预热条件和碳稀释对激光熔覆钢轨的显微组织和机械性能的影响。重载条件。热影响区的微观结构表明，通过使用350°C的预热温度增加预热区域的长度，可以成功地抑制马氏体的形成，这对轮-轨接触行为有不利影响。观察到碳从超共析基质中被稀释，并研究了其对410L铁素体不锈钢沉积物微观结构的影响。 410L覆层中铁素体的形成归因于极低的碳含量，并且在铁素体晶粒的边界上未观察到碳化物的形成。稀释带的厚度被确定为大约等于第一包层的厚度。通过EBSD获得的织构测量结果显示出随机趋势，这是由于在稀释带中形成了马氏体。开发了强大的固化纤维质地，可用于两次沉积，特别是在第二次沉积中。根据维氏显微硬度，剪切和拉伸屈服强度以及极限拉伸和剪切强度对410L沉积物进行机械表征与观察到的微观结构相关。 < / ce：抽象>

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