论文部分内容阅读
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 precipitation regularity of the second phase of UNS N08028 nickel base alloy were studied under three different processing conditions, ie no deformation, cold deformation and thermal deformation. The results show that the 028 Ni-based alloy is single-phase austenite and the second phase is a granular, rod-like intermetallic compound phase precipitated at grain boundaries. The plastic properties stored in the alloy after deformation can promote the precipitation of the second phase. The precipitation of the second phase after cold deformation inhibits the recrystallization of the alloy, the dynamic recrystallization takes place during the hot deformation and consumes some of the plastic properties. The second phase precipitates are the least in the undeformed alloy and disperse along the grain boundaries. The precipitation of the second phase in the alloy is the largest, covering almost the entire grain boundary.