论文部分内容阅读
利用荧光光谱、透射电镜、扫描电镜、光学显微镜及显微硬度计等研究固溶温度对J75钢显微组织及力学性能的影响。结果表明,固溶温度在900~980℃时,J75钢晶粒大小适中、尺寸均匀、没有明显混晶现象,随固溶温度升高晶粒粗化,强度及硬度降低,塑性及韧性升高,并有细小γ’-Ni3(Al,Ti)相均匀弥散析出;而当固溶处理温度从1000℃升高到1100℃时,晶粒继续粗化,组织中出现明显混晶及晶粒粗大现象,不适合工程应用。
The effects of solution temperature on the microstructure and mechanical properties of J75 steel were studied by fluorescence spectroscopy, transmission electron microscopy, scanning electron microscopy, optical microscopy and microhardness tester. The results show that the grain size of J75 steel is moderate and uniform in size at 900-980 ℃, and there is no obvious mixed crystal. With the increase of solution temperature, the grain coarsening, the strength and hardness decrease, and the plasticity and toughness increase , And fine γ’-Ni3 (Al, Ti) phases are uniformly dispersed and precipitated. When the solution treatment temperature is increased from 1000 ℃ to 1100 ℃, the grains continue to coarsen, and the obvious mixed crystals and coarse grains Phenomenon, not suitable for engineering applications.