摘要
使用VIC-3D技术测量了航空用GH2036合金静态拉伸二维应变及应力场,研究了其拉伸性能。基于四因素三水平正交试验方案进行了热处理工艺优化,利用蔡司显微镜对金相组织进行了观察,并研究了热处理工艺对该合金冲击性能的影响。利用应变-时间云图分析了应变场的变化。结果表明,时效时间对合金冲击性能影响最大,其次是固溶温度、时效温度、固溶时间,优化的热处理方案为920℃/45 min+520℃/3 h,在该热处理制度下,GH2036合金的冲击吸收功(181 J)较未热处理试样(95 J)提高90.5%;该合金热处理后的金相组织基体为奥氏体,且晶内和晶界处存在第二相,热处理优化工艺能够使晶粒细化和第二相强化效果实现最佳匹配。
Two dimensional strain and stress field of GH2036 alloy static tension were measured by using VIC-3D technique. The tensile properties were studied. Heat treatment process optimization was carried out based on four factors and three levels orthogonal experiment. Metallographic microstructure was observed by means of the microscope. The influence of heat treatment process on the impact properties of the alloy was studied. The variation of the strain field was analyzed by using the strain-time cloud image. The results show that, the effect of aging time on the impact properties of the alloy is the biggest, followed by the solid solution temperature, aging temperature, and solid solution time. The optimized heat treatment scheme is 920 ℃/45 min＋520 ℃/3 h. Under the heat treatment system, the impact absorption energy （181 J） of GH2036 alloy is improved by 90.5% compared with that of the non-heat treatment sample （95 J）. After heat treatment, the microstructure of the alloy matrix is austenite, and the second phase exists in the grain and grain boundary. Heat treatment optimization technology can make the grain refine and the second phase strengthening effect achieves the best matching.
出处
《热加工工艺》
CSCD
北大核心
2017年第9期134-138,共5页
Hot Working Technology
基金
国家自然科学基金项目(11502285)
中央高校基本科研业务费专项项目(3122015Z002)
