热处理参数对GH2150A合金冲击韧性的影响  

Effects of Heat Treatment on Impact Toughness of Alloy GH2150A

作　　者：赵宇新[1] 袁英[2] 缪宏博[3] 

机构地区：[1]北京航空材料研究院先进高温结构材料国防科技重点实验室,北京100095 [2]钢铁研究总院高温材料研究所,北京100081 [3]北京航空材料研究院失效分析中心,北京100095

出　　处：《航空材料学报》2008年第2期9-13,共5页Journal of Aeronautical Materials

摘　　要：研究GH2150A合金经前期热处理与中间热处理后合金组织变化对室温冲击性能的影响。利用光学金相和扫描电镜对合金组织和冲击断口进行观察。结果表明,经过这种热处理可以显著提高合金的室温冲击韧性,比经标准热处理的Ak提高36%。主要原因是该处理改变合金中碳化物的析出数量、形态和分布,减小γ′相的尺寸,从而改变室温冲击的断裂机制。该处理可以使合金得到良好的综合性能。The effect of microstructure changes after pre-treatment and intermediate heat treatment on the impact properties of room temperature of GH2150A alloy was researched. Optical metallography and SEM were used to observe the microstructure and impact fracture of the alloy. The results showed that, after the treatment, the impact toughness at room temperature was significantly improved. Compared with the standard heat treatment, Ak increased by 36%. The main reason for the improvment was that, it changed precipitation volume, shape and distribution of the carbide and decreased the size of γ′,so it changed the fracture mechanism of impact at room temperature. The treatment could obtain good comprehensive properties.

关 键 词：GH2150A合金 热处理参数 冲击韧性 碳化物 

分 类 号：TG132.3[一般工业技术—材料科学与工程]