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对热轧态GH3535合金进行不同温度和时间的固溶处理,采用扫描电子显微镜(SEM)、电子背散射衍射技术(EBSD)和拉伸试验等手段研究了固溶热处理后的合金组织及其对力学性能的影响。经过1177℃,20 min固溶热处理后,合金发生再结晶与晶粒长大,一次M_6C碳化物发生部分溶解。在更高温度下(1220和1260℃)固溶热处理后,晶粒异常长大且一次M_6C碳化物数量明显减少。随着固溶温度的提高和固溶时间的延长,合金的抗拉强度随之降低,而延伸率提高。通过组织分析发现,不同固溶热处理后合金的拉伸性能的变化源于晶粒的长大和一次M_6C碳化物的溶解。
The hot-rolled GH3535 alloy was solution-treated at different temperatures and times. The effects of solution heat treatment on the microstructure and properties of GH3535 alloy were studied by scanning electron microscopy (SEM), electron backscatter diffraction (XRD) and tensile test Effect of mechanical properties. After 1177 ℃, 20 min solution heat treatment, the alloy recrystallization and grain growth, a M_6C carbides partially dissolved. After solution heat treatment at higher temperatures (1220 and 1260 ℃), the grains grow abnormally and the amount of M_6C carbides decreases obviously. With the increase of solution temperature and solution time, the tensile strength of the alloy decreases and the elongation increases. Tissue analysis shows that the tensile properties of the alloys after different solution heat treatment are due to the grain growth and the dissolution of a carbides M_6C.