摘要
用光学金相、透射电镜和Ｘ射线衍射技术对３００４铝合金铸轧板均匀化后的组织和织构进行了分析。发现随均匀化温度的升高，ＭｎＡ１＿６析出相尺寸变大，颗粒尺寸在１～３μｍ之间；用ＯＤＦ（ＳｐａｃｅｏｒｉｅｎｔａｔｆｏｎＤｉｓｔｒｉｂｕｔｉｏｎＦｕｎＣｔｉｏｎ）分析技术测算了该板材的织构。可明显看出５８０℃均匀化处理后，保持原有织构，且有向再结晶织构（即｛１００｝＜００１＞织构）转变的趋势；６２０℃均匀化处理后，部分原有织构得以保留，存在有｛１００｝＜００１＞织构，同时有｛ｌ１２｝＜１１１＞向｛１００｝＜００１＞的织构转变。还发现析出相颗粒的形成对织构的转变有一定的抑制作用。
The microstructure and the texture of melt rolling 3004 aluminum alloy slabsubjected to hofnosenization were studied by the use of optical micrcacopo, TEM and X-raydiffractometer. It is found that the size of MnA1_6 precipitates in matrix increases with thehomosenization temperature incrcase and is ranging from 1 to 3pm. The tex ture of the slabwas also determined by means of the space orientation distribution function analysis method.The results show that after homosenization at the temporature of 580℃ the initial texniremaintains and exhibits a tendency to chanse into the recrytallization texture, ie. the {100}<001>. After homogenization at the temperature of 620℃ , there exist the initial textureand recrytallization texture; At the sanie time the {112}<111> texture changes into{100}<001> one. The existence of the precipitates edsbits a retardation effee't on thetexture change.
关键词
铝合金
均匀化
热处理
织构
组织
aluminum alloy, homogeneous treatment, texture, space orientationdistribution function
