• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Examination of Weld Hot Cracking in a Transition Joint Between HP 9-4-20 Steel and 21-6-9 Stainless Steel
【24h】

Examination of Weld Hot Cracking in a Transition Joint Between HP 9-4-20 Steel and 21-6-9 Stainless Steel

机译：Hp 9-4-20钢与21-6-9不锈钢过渡接头焊缝热裂纹的检测

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A statistically designed, full-scale, weldment test series has been employed to appraise the possible influence of weld production irregularities on the cracking tendency of a gas-tungsten arc/cold wire feed weld between HP 9-4-20 steel and 21-6-9 stainless steel. Optical light microscopy, scanning electron microscopy, and Auger electron spectroscopy were utilized to characterize the metallurgical nature of weld cracking. The HP 9-4-20 filler material was found to be the most important production variable. Weld cracking was contingent on a particular heat of weld wire. The 21-6-9 material is apparantly a prerequisite for the cracking process. Weld wire and weld metal chemical analysis affords no clarification of the cracking problem. Fractographic evidence suggests liquation as the most plausible cause of weld cracking. Enrichment of boron, nitrogen, and sulfur along weld cracks was detected by Auger electron spectroscopy. Data gained from an investigation of Auger free-surface segregation shows that the potential for boron and nitrogen enrichment is greater in the crack-susceptible weld metal. The full implications of the Auger observations with regards to weld cracking are presently unknown. (ERA citation 11:041316)

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