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采用X射线四环衍射技术对比分析了通过冷轧和轧制中间热处理制备的2种Ni-9.3at%W(Ni9W)合金基带的轧制织构和再结晶织构,研究了不同Ni9W合金基带在热处理过程中轧制织构向再结晶织构的演变。其次,采用背散射电子衍射(EBSD)技术对以上2种Ni9W合金基带的微观组织和立方织构进行了表征。结果表明,与传统冷轧Ni9W合金基带的轧制织构相比,经轧制中间热处理后其轧制织构中S取向和Copper取向的含量增加、Brass取向的含量减少,使其轧制织构的类型介于Brass型轧制织构与Copper型轧制织构之间。2种Ni9W合金基带经低温回复后,其轧制织构含量均有一定的增加;另外,再结晶过程中轧制织构的含量均迅速降低,但立方取向的含量并没有明显增加,而是出现大量的随机取向,Ni9W的再结晶具有了连续再结晶的特征,这也是导致Ni9W合金基带较难形成立方织构的一个主要原因。虽然经过轧制中间热处理后Ni9W合金基带在初始再结晶完成后并没有形成一定强度的立方织构,但其立方取向的含量仍然能在进一步热处理过程中通过立方取向晶粒的长大而得到加强。最后,采用轧制中间热处理制备的Ni9W合金基带经两步高温热处理后其立方织构的含量达到84.5%(<15°)。
The texture and recrystallization texture of two kinds of Ni-9.3at% W (Ni9W) alloy ribbons prepared by cold rolling and intermediate heat treatment were analyzed by X-ray four-ring diffraction. The effects of different Ni9W alloy ribbons The Evolution of Rolled Texture to Recrystallized Texture during Heat Treatment. Secondly, the microstructure and cubic texture of the two Ni9W alloy ribbons were characterized by backscattered electron diffraction (EBSD). The results show that compared with the conventional cold-rolled Ni9W alloy substrate, the content of S orientation and copper orientation increase and the content of Brass orientation decreases after the rolling intermediate heat treatment, so that the rolling texture The type of structure is between Brass type and Copper type. The textures of the two kinds of Ni9W alloy base annealed at low temperature all increased to a certain degree. In addition, the content of the rolled texture decreased rapidly during recrystallization, but the content of cubic orientation did not increase significantly A large number of random orientations appeared. The recrystallization of Ni9W possessed the characteristics of continuous recrystallization, which was also a major reason for the cubic texture of Ni9W alloy matrix. Although the Ni9W alloy matrix does not form a cubic texture with a certain strength after the initial recrystallization after the intermediate heat treatment, the content of cubic orientation can still be strengthened by the growth of cubic oriented grains during further heat treatment . Finally, the cubic texture of Ni9W alloy prepared by the intermediate heat treatment of rolling was 84.5% (<15 °) after two-stage heat treatment.