锻压技术

预拉伸5%处理对2219铝合金板材织构的影响

英文标题：Influence of prestretch 5% on texture of aluminum alloy 2219 plate

作者：房娃李继光李玉辰张下陆卢润卓

分类号：TG146.2

出版年,卷(期):页码：2018,43(6):147-150

摘要：

对2219铝合金板材进行预拉伸，预拉伸量为5%，将未预拉伸和预拉伸量为5%的板材在535 ℃保温30~35 min固溶，水冷，然后利用电子背散射衍射技术（EBSD）研究了预拉伸处理对板材晶粒尺寸和织构的影响。结果表明：经过5%预拉伸，材料晶粒发生了明显长大现象，晶粒由原来的57 μm长大到 462 μm。材料织构也发生了明显变化，原始板材分布有立方(001)［100］、旋转立方(001)［110］以及黄铜(011)［211］织构，但整体强度分布很低；经过5%预拉伸和固溶处理以后，板材的织构发生了明显变化，在板材中只有立方织构(001)［100］，同时强度显著增强，立方织构组分含量为13.2%。

In the process of preparation and processing of aluminum alloy sheet, texture exists widely, which have an adverse effect on obtaining the quality of aluminum alloy products. Therefore, firstly the sheet was prestretched and prestretch was 5%, and then the sheets without prestretch and 5% prestretch were conducted the solution treatment at 535 ℃ for 30-35 min and cooled by water. Furthermore, the influences of prestretch on grain size and texture of aluminum alloy 2219 sheet were investigated by electron backscatter diffraction (EBSD). The result shows that the grain size of the material grows obviously from 57 μm to 462 μm after prestretch 5%, and texture of the material is also changed obviously. The textures of the original sheet are distributed in cubic (001) ［100］, rotating cubic (001) ［110］, and brass (011) ［211］ texture, but the overall strength distribution is very low. However, after prestretch 5% and solution treatment，the texture of the sheet is changed greatly, and there is only cube texture (001) ［100］ in the prestretch sheet. Meanwhile, the strength of texture is strengthened obviously, and the content of the cube texture is 13.2%.

基金项目：

国家自然科学基金资助项目（51301121）

房娃（1979-），女，博士，讲师；Email： fangwa1@sina.com

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