作　　者： ; ; ; (张忠铧）; (张春霞）;

机构地区： 西北工业大学材料学院凝固技术国家重点实验室

出　　处： 《铸造技术》 2012年第3期298-301,共4页

摘　　要： 在未变形、冷变形、热变形3种不同加工条件下,对UNS N08028镍基合金的微观组织及第二相的析出规律进行研究。结果表明:028镍基合金为单相奥氏体组织,第二相为颗粒状、杆状金属间化合物相,且在晶界析出。变形后合金中储存的塑性能对第二相析出起到促进作用。冷变形后第二相的析出抑制合金发生再结晶;热变形过程中发生动态再结晶,消耗部分塑性能;未变形合金中第二相析出量最少,呈颗粒状沿晶界离散分布;冷变形合金中第二相析出量最多,几乎覆盖整个晶界。 The microstructure and second phase precipitation of UNS N08028 nickel-based alloy was investigated by non-deformation, cold-deformation and thermal-deformation of three different processing conditions. The results show that the alloy is equiaxed austenite grains and granular and acicular o＂ phase distributed along grain boundaries. Plastic storage energy in deformation alloy plays a role in promoting precipitation of the second phase. The second phase precipitation in cold-deformation alloy restrains recrystallization of the alloy. During hot-deformation, dynamic recrystallization occurs in the alloy and consumes a part of plastic storage energy. The precipitation quantity of the second phase is least in non-deformation alloy and distributed discretely at grain boundaries, and is largest in cold-deformation alloy and distributed almost in overlay grain boundaries.

关 键 词： 镍基合金 第二相 再结晶 热模拟

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]