• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Tempering and Strain on Decomposition of Metastable Austenite in X210CrW12 Thixo-Cast Steel
【24h】

Effect of Tempering and Strain on Decomposition of Metastable Austenite in X210CrW12 Thixo-Cast Steel

机译：回火和应变对X210CrW12触变铸钢中亚稳奥氏体分解的影响

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

Thixoforming of hot rolled X210CrW12tool steel led to the formation of globular austenitic grains (82.4 vol.%) surrounded by eutectic mixture (alpha-Fe and M7C3 carbides). The thixo-cast steel reached compression strength 4.8 GPa at plastic strain 34%. The analysis of pole figures after deformation indicated distinct texturization of microstructure in comparison with undeformed steel. Main texture components for austenite were {101}, aOE (c) 010 >, while ferrite did not reveal clearly formed orientation. DSC analysis confirmed that austenitic structure in the X210CrW12 steel was metastable and temperature of decomposition depended on the strain applied at 634 A degrees C for the un-deformed sample and at 599 A degrees C for sample compressed up to 4.8 GPa. Discontinuous transformation of austenite into perlite, that started mainly at grain boundaries and proceeded to the center, was the predominant mechanism responsible for the decomposition of globular grains in thixoformed X210CrW12 steel. The decomposition caused by tempering of supersaturated and severely strained steel led to obtaining characteristic product of transformation of higher hardness in comparison with only tempered sample. In the deformed sample the reaction started on slip bands and twins which revealed high density of defects, promoting precipitation of carbides, followed by local depletion in carbon as a result of alpha'- Fe formation. In contrast to non-deformed state they covered the area of grains. Two fronts of reaction alpha-Fe plate +M3C -> mixture of alpha-Fe and M7C3 carbides were also observed.
机译：热轧X210CrW12工具钢的触变成形导致形成球状奥氏体晶粒（82.4体积％），并被共晶混合物（α-Fe和M7C3碳化物）包围。触变铸造钢在塑性应变为34％时达到抗压强度4.8 GPa。变形后的极图分析表明，与未变形的钢相比，显微组织明显不同。奥氏体的主要织构成分为{101}，aOE（c）010>，而铁素体未显示清晰形成的取向。 DSC分析证实，X210CrW12钢中的奥氏体组织是亚稳态的，分解温度取决于未变形样品在634 A的温度和压缩至4.8 GPa的样品在599 A的应变。奥氏体向珍珠岩的不连续转变主要发生在晶界处，然后一直延伸到中心，这是触变性X210CrW12钢中球状晶粒分解的主要机理。与仅回火的样品相比，过饱和和严重应变的钢的回火引起的分解导致获得更高硬度转变的特征产物。在变形的样品中，反应在滑移带和孪晶上开始，这表明缺陷的密度很高，从而促进了碳化物的沉淀，随后由于α'-Fe的形成而使碳局部耗尽。与未变形状态相反，它们覆盖了谷物区域。还观察到了反应α-Fe板+ M3C的两个前沿->α-Fe和M7C3碳化物的混合物。

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