• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Fourth International Conference on Recrystallization and Related Phenomena, Jul 13-16, 1999, Tsukuba City, Japan >Thermal Stability of the Ultrafine Grain Structure in a Consolidated Product of Mechanically Milled Iron Powder
【24h】

Thermal Stability of the Ultrafine Grain Structure in a Consolidated Product of Mechanically Milled Iron Powder

机译：机械研磨铁粉固结产品中超细晶粒结构的热稳定性

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

Influence of fine iron oxide particles on thermal stability of a fine grain structure with 0.7 μm in ferrite grain size was examined. The round bar specimens which contained 0.2mass% oxygen as oxide particles were produced by consolidation of mechanically milled iron powders. Grain coarsening was not recognized at temperatures lower than 973K which was the consolidation temperature. The specimen maintained a very fine grain size of smaller than 1 μm after annealing at 1123K. After heating at 1473K (well above the A_3 temperature), the sample exhibited a transformed ferrite structure with a grain size of about 20 μm. A fine grain ferrite structure of about 30 μm was also obtained even after a HAZ simulated heat treatment with the highest temperature of 1673K. These results suggest that fine oxide particles are effective to retard grain growth in the austenite range as well as in the ferrite range.
机译：研究了氧化铁细颗粒对铁素体晶粒尺寸为0.7μm的细晶粒结构的热稳定性的影响。通过固结经过机械研磨的铁粉制成了含有0.2质量％的氧作为氧化物颗粒的圆棒试样。在低于固结温度973K的温度下未发现晶粒粗化。在1123K退火后，样品保持小于1μm的非常细的晶粒尺寸。在1473K（远高于A_3温度）下加热后，样品呈现出晶粒尺寸约为20μm的相变铁素体结构。即使经过最高温度1673K的HAZ模拟热处理，也可以获得约30μm的细晶粒铁素体结构。这些结果表明，在奥氏体范围以及铁素体范围内，氧化物微粒有效地阻碍了晶粒的生长。

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