TiAl基合金排气阀金属型离心铸造过程内部缺陷分析

航空材料学报, 2000, 20(2): 40-45. doi: 10.3969/j.issn.1005-5053.2000.02.007

TiAl基合金排气阀金属型离心铸造过程内部缺陷分析

盛文斌 ^1, , 郭景杰 ^2, , 苏彦庆 ^3, , 丁宏升 ^4, , 贾均 ^5,

1.哈尔滨工业大学铸造教研室434#,哈尔滨,150001

2.哈尔滨工业大学铸造教研室434#,哈尔滨,150001

3.哈尔滨工业大学铸造教研室434#,哈尔滨,150001

4.哈尔滨工业大学铸造教研室434#,哈尔滨,150001

5.哈尔滨工业大学铸造教研室434#,哈尔滨,150001

关键词：金属型 , TiAl基合金 , 离心浇注 , 流态

Analysis on inner defects in TiAl based alloy exhaust valve during the centrifugal foundry process in permanent mold

在所建立的数学模型基础上总结了TiAl基合金熔体离心力场下的充型规律.结果表明,离心力场的施加对于充型过程有重要影响,熔体以变化的截面面积和倾角填充铸型.熔体截面面积随充型长度的增大而减小,而熔体截面倾角随充型长度的增大而增大,这种变化在型腔入口附近表现得更加明显.此外,针对金属型离心浇铸Ti-48Al-2Cr-2Nb (at%) 合金汽车排气阀内部的常见缺陷,探讨了离心力场下排气阀内部卷入性气孔和偏中心线缩松的产生机理.

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TiAl基合金排气阀金属型离心铸造过程内部缺陷分析

Analysis on inner defects in TiAl based alloy exhaust valve during the centrifugal foundry process in permanent mold

参考文献