...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Improvement of Rigidity of Super Invar Cast Steel via Austenite Recrystallization Induced by Martensitic Reversion
【24h】

Improvement of Rigidity of Super Invar Cast Steel via Austenite Recrystallization Induced by Martensitic Reversion

机译：通过马氏体回归诱导的奥氏体重结晶超强铸钢刚性的改善

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

Super invar cast steel, 32mass%Ni-5mass%Co, with an excellent low thermal expansion coefficient exhibits very low Young's modulus due to a course solidified columnar structure with < 100> austenite texture. For the improvement of the low Young's modulus, a novel heat treatment consisted of subzero treatment and subsequent annealing was applied to stimulate microstructure evolution accompanied with texture variation. Lenticular martensite preferentially formed along a dendrite structure with lower Ni concentration after subzero treatment at liquid nitrogen temperature and then reversed into austenite again by the subsequent annealing above 873 K via diffusionless shear mechanism, that is, martensitic reversion took place. Since the martensitic reversion realizes a crystallographic reversibility, the course columnar structure at initial state was reconstructed after the completion of reversion. Furthermore, the course structure formed via martensitic reversion recrystallized to equiaxed fine-grained structure when the annealing temperature became higher, because high density dislocations in martensitic reversed austenite caused by the invariant lattice deformation on two directional martensitic transformations drives the austenite recrystallization. The recrystallization leads to the formation of fine-grained austenitic structure with random orientation, and as a result, Young's modulus of super invar cast steel was improved to be as high as the forged one without any plastic deformation process.
机译：超强铸钢，32mas％Ni-5mass％Co，具有优异的低热膨胀系数，由于具有<100奥氏体纹理的静态凝固柱结构，具有极低的杨氏模量。为了改善较小的杨氏模量，采用亚单处理和随后的退火组成的新型热处理以刺激伴有质地变异的微观结构演进。透镜状马氏体在液氮温度零下处理后沿具有较低的Ni浓度的枝晶组织优先形成，然后通过随后的退火以上873K下通过无扩散剪切机理，即反转为奥氏体再次，马氏体反转发生。由于马氏体逆向实现了晶体可逆性，因此在完成逆转后重建初始状态下的课程柱状结构。此外，当退火温度变得更高时，通过马氏体逆转形成的路径结构被重结晶至等轴细粒结构，因为在两个定向马氏体转化上由不变的晶格变形引起的马氏体反转奥氏体中的高密度脱位驱动奥氏体重结晶。重结晶导致形成具有随机取向的细粒奥氏体结构，结果，改善了超强铸钢的杨氏模量，而没有任何塑性变形过程的锻造。

著录项

  • 来源
    《ISIJ international》 |2020年第11期|2609-2614|共6页
  • 作者

    Naoki SAKAGUCHI; Kotaro ONA; Rui BAO; Nobuo NAKADA;

  • 作者单位

    Shinhoukoku Steel Corporation 5-13-1 Arajuku-machi Kawagoe Saitama 350-1124 Japan Department of Materials Science and Engineering Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama Kanagawa 226-8503 Japan;

    Shinhoukoku Steel Corporation 5-13-1 Arajuku-machi Kawagoe Saitama 350-1124 Japan;

    Department of Materials Science and Engineering Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama Kanagawa 226-8503 Japan;

    Department of Materials Science and Engineering Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama Kanagawa 226-8503 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    super invar; cast steel; austenite; martensitic reversion; recrystallization; Young's modulus;

    机译：超级Invar;铸钢;奥氏体;马氏体回归;重结晶;年轻的模量;

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