摘要
为了研究快速凝固对Al-Ti-B中间合金细化效果的影响，对其进行了熔体快淬处理，在冷却速度为10^5～10^5℃／s时，得到了薄丝带状细化剂。通过SEM和TEM分析可知，快速凝固后细化剂中的TiAl3由纳米晶和少量非晶态合金组成，尺寸由30～35μm下降为50～100nm。分别用薄丝带状和杆状Al—Ti—B中间合金对ZL109进行细化处理时发现：薄丝带状细化剂比杆状细化剂的细化效果好，使ZLl09的力学性能有了进一步的提高，抗拉强度提高32．9％，断后伸长率提高15．6％，硬度提高5．69％。因此，快速凝固是提高Al-Ti-B中间合金细化效果的有效途径。
In order to study the influence of rapid solidification on refining effect,Al-Ti-B master alloy has been rapidly solidified with melt-spin method, and melt-spin ribbon is gained at 105- 106 ℃/s. SEM and TEM analysis shows that the TiAl3 in Al-Ti-B alloy is composed of nano-sized grains and amorphous zones, and its grain size decreased from 30-35 μm to 50-100 nm. The test of ZL109 refined respectively by ribbon and rod Al-Ti-B master alloy shows that： the refining effect of ribbon Al-Ti-B is better than rod ones, and mechanical performance of ZL109 alloy refined by ribbon Al-Ti-B master alloy is improved evidently, tensile-strength increased by 32.9%, elongation coefficient by 15.6% and hardness by 5.69%. Therefore, rapid solidification is a feasible method to improve the refining effect of Al-Ti-B master alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第1期29-32,共4页
Rare Metal Materials and Engineering
基金
河北省自然科学基金资助项目(E2006000025)
