和織構(gòu)的影響
(1. 東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng) 110004；
2. 沈陽(yáng)理工大學(xué) 裝備工程學(xué)院，沈陽(yáng) 110168)
摘 要: 研究了擠壓比、擠壓溫度及電場(chǎng)退火對(duì)AZ31鎂合金組織和織構(gòu)的影響。結(jié)果表明：擠壓比達(dá)到16時(shí)動(dòng)態(tài)再結(jié)晶基本完成，擠壓比為25時(shí)形成平均晶粒尺寸為7.3 µm的均勻組織；隨著擠壓比由小到大，以{0110}
關(guān)鍵字: AZ31鎂合金；織構(gòu)；動(dòng)態(tài)再結(jié)晶；擠壓比；擠壓溫度；電場(chǎng)退火
microstructure and texture of
AZ31 magnesium alloy
WANG Fu1, ZUO Liang1
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
2. School of Equipment Engineering, Shenyang Ligong University, Shenyang 110168, China）
Abstract:The effect of extrusion ratio, temperature and electric field annealing on microstructure and texture of AZ31 magnesium alloy were investigated. The results show that the dynamic recrystallization is completed when the extrusion ratio reaches 16. When the extrusion ratio is 25, the microstructure of fine and even grains with average dimension of 7.3 μm can be obtained. With increasing extrusion ratio, the deformation textures represented by {0110} surface texture decrease, while the recrystallization textures of {0221} and {1231} increase. With increasing extrusion temperature, high temperature extrusion helps to diffuse alloy elements and produces dynamic recrystallization, which stops a discontinuous precipitation of Mg17A112 and MnA1 from being separated out. The microstructure tends to become even. The main texture components have changed from {0110} surface texture to {0661} ore. For AZ31 magnesium alloy, its annealing in electric field delays the process of recrystallization. As a result, it refrains the recrystallized grains from growing and increases the diffusion of annealing texture.
Key words: AZ31 magnesium alloy; texture; dynamic recrystallization; extrusion ratio; extrusion temperature; electric field annealing
