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采用不同厚度的板块模拟喷嘴环叶片不同截面部位,以此研究壁厚效应对铸造2Cr13合金在各工艺状态下的组织和室温、高温力学性能的影响。结果表明,铸造薄板试样内部因有较多显微疏松,其综合力学性能显著低于厚板试样;经退火处理,试样成份偏析得到消除,性能有所改善,但退火态与淬火十回火态试样在组织和性能上基本无大的区别。
The effects of wall thickness on the microstructure and mechanical properties at room temperature and elevated temperature of 2Cr13 alloy were studied by simulating the different cross sections of nozzle ring blades with different thickness plates. The results show that the internal mechanical properties of the as-cast thin-plate specimens are obviously less than that of the slab samples because of the more microscopic looseness. After annealing, the segregation of the sample components is eliminated and the properties are improved. However, Back to the fire specimen in the organization and performance is no major difference.