| Al-Ti-B中间合金微观组织的形成与演变 | |
| 陈亚军 ; 许庆彦 ; 黄天佑 ; CHEN Yajun ; XU Qingyan ; HUANG Tianyou | |
| 2010-06-08 ; 2010-06-08 | |
| 关键词 | 中间合金 细化剂 微观组织 再结晶 第二相 master alloy refined grains microstructure recrystallization second-phase particles TG113.1 |
| 其他题名 | Microstructure evolution of Al-Ti-B master alloy during refining and extrusion |
| 中文摘要 | 为了优化中间合金细化剂的组织,进而提高细化性能,采用氟盐铝热反应法制取A l5T i1B中间合金。在化学反应热力学和动力学基础上,对中间合金典型的铸态微观组织进行了分析,并通过对比热挤压前后的微观组织,研究挤压工艺对组织的影响。结果表明,铸态条件下T iB2主要呈4种分布形态:附着在T iA l3上,分布在T iA l3之间,规则排列在晶界处,形成团聚。经热挤压之后T iA l3颗粒尺寸减小,表面趋于平滑,挤压过程中发生的再结晶现象使T iB2分布均匀弥散。要取得理想的中间合金组织,优化挤压工艺同控制化学反应和铸造凝固条件一样重要。; To obtain better microstructures,Al5Ti1B master alloy was prepared by reacting complex halide salts with molten aluminum at high temperatures.The as-cast microstructures were analyzed based on the thermodynamics and flow dynamics.The effect of the extrusion process on microstructure was studied by comparing the microstructure after squeezing with the as-cast microstructure.The results show that the TiB_2 particles are attached to the TiAl_3 grains,located between the TiAl_3 grains,arranged to the α-Al grain boundaries or integrated into congregated complexes.The TiAl_3 grains become smaller and smoother during extrusion with recrystallization during the squeezing,which results in a more homogeneous distribution of the TiB_2 particles.An optimized hot extrusion process is a key factor affecting the microstructure along with the chemical reactions and the casting.; 国家“九七三”重点基础研究项目(2005CB724105) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/48146]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 陈亚军,许庆彦,黄天佑,等. Al-Ti-B中间合金微观组织的形成与演变[J],2010, 2010. |
| APA | 陈亚军,许庆彦,黄天佑,CHEN Yajun,XU Qingyan,&HUANG Tianyou.(2010).Al-Ti-B中间合金微观组织的形成与演变.. |
| MLA | 陈亚军,et al."Al-Ti-B中间合金微观组织的形成与演变".(2010). |
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