• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Naval Architecture and Ocean Engineering >Development of low-temperature high-strength integral steel castings for offshore construction by casting process engineering
【24h】

Development of low-temperature high-strength integral steel castings for offshore construction by casting process engineering

机译：通过铸造工艺技术开发用于海上施工的低温高强度整体钢铸件

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

摘要

ABSTRACT In casting steels for offshore construction, manufacturing integral casted structures to prevent fatigue cracks in the stress raisers is superior to using welded structures. Here, mold design and casting analysis were conducted for integral casting steel. The laminar flow of molten metal was analyzed and distributions of hot spots and porosities were studied. A prototype was subsequently produced, and air vents were designed to improve the surface defects caused by the release of gas. A radiographic test revealed no internal defects inside the casted steel. Evaluating the chemical and mechanical properties of specimens sampled from the product revealed that target values were quantitatively satisfied. To assess weldability in consideration of repair welding, the product was machined with grooves and welded, after which the mechanical properties of hardness as well as tensile, impact, and bending strengths were evaluated. No substantive differences were found in the mechanical properties before and after welding.
机译：摘要在用于海上施工的铸钢中，制造整体铸造结构以防止应力产生器中的疲劳裂纹优于使用焊接结构。在此，对整体铸造钢进行了模具设计和铸造分析。分析了熔融金属的层流，并研究了热点和孔隙率的分布。随后生产了原型，并设计了通风孔以改善由气体释放引起的表面缺陷。射线照相测试表明铸钢内部没有内部缺陷。评价从产品中取样的样品的化学和机械性能表明，定量地满足了目标值。为了在考虑补焊的情况下评估可焊性，将产品加工成沟槽并进行焊接，然后评估硬度的机械性能以及拉伸，冲击和弯曲强度。焊接前后的机械性能没有发现实质性差异。

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