变形对Al-Ti-C-B晶种合金晶粒细化行为的影响机理

王芳; 陆峰华; 王奥; 聂金凤; 刘相法

doi:10.15980/j.tzzz.2018.08.028

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变形对Al-Ti-C-B晶种合金晶粒细化行为的影响机理
Effects of Deformation on Grain Refinement Behavior of Al-Ti-C-B Seed Crystal Alloy
2018年38卷第8期页码：916-919
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.08.028

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[1]王芳,陆峰华,王奥,聂金凤,刘相法.变形对Al-Ti-C-B晶种合金晶粒细化行为的影响机理[J].特种铸造及有色合金,2018,38(08):916-919.

Wang Fang, Lu Fenghua, Wang Ao, et al. Effects of Deformation on Grain Refinement Behavior of Al-Ti-C-B Seed Crystal Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(8):916-919.
[1]王芳,陆峰华,王奥,聂金凤,刘相法.变形对Al-Ti-C-B晶种合金晶粒细化行为的影响机理[J].特种铸造及有色合金,2018,38(08):916-919. DOI： 10.15980/j.tzzz.2018.08.028.

Wang Fang, Lu Fenghua, Wang Ao, et al. Effects of Deformation on Grain Refinement Behavior of Al-Ti-C-B Seed Crystal Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(8):916-919. DOI： 10.15980/j.tzzz.2018.08.028.

摘要

采用了室温冷轧对Al-Ti-C-B晶种合金进行了变形处理

并探究了变形量对其组织及其对工业纯铝晶粒细化和抗衰退性的影响。结果表明

变形使铸态组织中粗大的TiAl3相发生明显的破碎细化

并在一定程度上改善了TiCxBy的弥散分布。在工业纯铝中添加0.2%的铸态Al-5Ti-0.3C-0.2B晶种合金

纯铝的平均晶粒尺寸由1 500μm细化到240μm。当添加变形量为60%的晶种合金时

α-Al的平均晶粒尺寸可进一步细化至165μm

变形后细化效果提高了约1.5倍

并且在保温75min后无明显衰退。但随变形量进一步增加至90%以上时

晶种合金的细化效果略有下降

但其晶粒细化效果仍优于铸态晶种合金。

Abstract

The effects of deformation on the microstructure and the grain refinement performance of AlTi-C-B seed crystal alloys deformed by cold rolling were investigated.It is found that the coarse TiAl3 phases are broken and the TiCxBy particles in the matrix are more dispersive.The average grain size ofα-Al can be refined from 1 500μm to 240μm with adding 0.2%as-cast Al-5 Ti-0.3 C-0.2 Bseed crystal alloy.It is found that the grain size is further decreased to 165μm by adding the seed alloy with 60% deformation rate at the same addition and the good refinement performance can be stayed within 75 min without obvious fading.However

with the further increase of deformation to 90%

the grain refinement effect of the seed crystal alloy is decreased slightly

which is still better than that of the as-cast ones.