| 史振学,王效光.耐热盐腐蚀单晶高温合金的组织稳定性研究[J].有色金属材料与工程,2025,46(2):88-92. |
| 耐热盐腐蚀单晶高温合金的组织稳定性研究 |
| Study on the microstructure stability of a heat-salt-corrosion resistant single crystal superalloy |
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| DOI：10.13258/j.cnki.nmme.20241112001 |
| 中文关键词: 单晶高温合金 耐热盐腐蚀 组织稳定性 |
| 英文关键词:single crystal superalloy heat-salt-corrosion resistant microstructure stability |
| 基金项目:装备预研技术项目(3020402080402) |
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| 摘要点击次数: 909 |
| 全文下载次数: 607 |
| 中文摘要: |
| 采用螺旋选晶法在单晶炉中完成一种耐热盐腐蚀单晶高温合金试棒的制备，试验合金经过完全热处理后在980 ℃时效1 000 h，每200 h取出试验合金分析试验合金显微组织、测试试验合金在980 ℃的高温拉伸性能，研究了时效时间对试验合金显微组织和拉伸性能的影响。研究结果显示，研制的耐热盐腐蚀单晶高温合金完全热处理后，获得良好的规则立方状沉淀强化γ′相组织，随时效时间的延长，该试验合金γ基体通道宽度增大，γ′相尺寸增加。时效1 000 h后，γ′相仍为立方状，未见析出拓扑密排(topologically close-packed, TCP)相，这表明该单晶高温合金组织稳定性优异。试验合金的抗拉强度和屈服强度随时效时间延长而减小，而试验合金的伸长率和断面收缩率随时效时间的延长而升高。 |
| 英文摘要: |
| A heat-salt-corrosion resistant single crystal superalloy was prepared in a single crystal furnace by spiral crystal selection method. After complete heat treatment, the experimental alloy was aged at 980 °C for 1 000 h. The experimental alloy was taken out for every 200 h to analyze the microstructures and test the high-temperature tensile properties of the experimental alloy at 980 °C. The effect of aging time on the microstructures and tensile properties of the experimental alloy was studied. The research results show that a good regular cubic precipitation strengthening γ′ phase structure is obtained in the developed heat-salt-corrosion resistant single crystal superalloy after complete heat treatment. With the extension of aging time, the γ-matrix channel width of the experimental alloy increases and the size of the γ' phase increases. After 1 000 h of aging, the γ' phase remained cubic and topologically close-packed (TCP) phase was hardly observed, indicating an excellent structural stability of the single crystal superalloy. The tensile strength and yield strength of the experimental alloy decrease with increasing aging time, while the elongation and cross-sectional shrinkage of the experimental alloy increase with increasing aging time. |
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