...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Evaluation of methods to predict safe welding conditions and maximum HAZ hardness in steel welding
【24h】

Evaluation of methods to predict safe welding conditions and maximum HAZ hardness in steel welding

机译：评价钢焊接中安全焊接条件和最大HAZ硬度的方法

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

During the last ten years new structural steels of improved weldability have been introduced. In particular, structural steels for the fabrication of offshore structures have been greatly improved in this respect throughout this period. These steels have lean chemical compositions which are generally outside the range for which the existing HAZ hardness criteria and the International Institute of Welding carbon equivalent (CEIIW) formula were originally developed. This paper presents the results from investigations of the weldability of three normalised (R{sub}e mm 350 MPa) and three quenched and tempered (R{sub}e mm 500 MPa) offshore structural steels. Weldability testing was conducted to study the relative performance of the different steels and to obtain a comparison between the capability of the different methods to predict safe welding conditions to avoid cold cracking in steel welding. It has become a widespread practice in welding high-strength steels to incorporate maximum HAZ hardness restrictions in fabrication specifications, particularly so in the offshore industry. Maximum HAZ hardness restrictions are often a point of contention between fabricators and their clients due to the difficulties often experienced in meeting these hardness requirements. Problems meeting maximum HAZ hardness requirements have been encountered for applications where maximum hardness HRC 22 or Vickers HV10 260 have been imposed for materials exposed to sour service in oil and gas production, processing and transportation. Many attempts have been made to develop empirical formulas for the estimation of maximum HAZ hardnesses. This paper presents some of the more successful approaches proposed to date and compares their performance.
机译：在过去的十年中，已经引入了可焊接性得到改善的新型结构钢。特别是，在此期间，用于海上结构制造的结构钢在这方面已得到了很大的改进。这些钢的贫化化学成分通常超出了现有HAZ硬度标准和国际焊接碳当量（CEIIW）公式最初制定的范围。本文介绍了三种正火（R {e} mm 350 MPa）和三种调质（R {e} mm 500 MPa）海上结构钢的焊接性能。进行可焊性测试以研究不同钢的相对性能，并比较不同方法预测安全焊接条件以避免钢焊接中冷裂纹的能力。在制造规格中纳入最大的HAZ硬度限制已成为焊接高强度钢的普遍做法，特别是在海上工业中。由于在满足这些硬度要求方面经常遇到困难，因此最大的HAZ硬度限制通常是制造商与其客户之间争执的一个问题。对于在石油和天然气生产，加工和运输中经受酸服务的材料施加最大硬度HRC 22或维氏HV10 260的应用中，遇到了满足最高HAZ硬度要求的问题。已经进行了许多尝试来开发用于估计最大HAZ硬度的经验公式。本文介绍了迄今为止提出的一些更成功的方法，并比较了它们的性能。

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