Analysis of Factors Influencing Metallurigical Defects in Slender Grain-Fined Blades

Wang Yongming; Huang Aihua; Zhang Jianguo; Zhu Shizhe; Cui Shusen

doi:10.15980/j.tzzz.2014.02.030

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Analysis of Factors Influencing Metallurigical Defects in Slender Grain-Fined Blades
Vol. 34, Issue 2, Pages: 191-193(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.02.030

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[1]王永明,黄爱华,张建国,祝世哲,崔树森.薄细长细晶叶片冶金缺陷影响因素研究[J].特种铸造及有色合金,2014,34(02):191-193.

Wang Yongming, Huang Aihua, Zhang Jianguo, et al. Analysis of Factors Influencing Metallurigical Defects in Slender Grain-Fined Blades. [J]. Special Casting & Nonferrous Alloys 34(2):191-193(2014)
[1]王永明,黄爱华,张建国,祝世哲,崔树森.薄细长细晶叶片冶金缺陷影响因素研究[J].特种铸造及有色合金,2014,34(02):191-193. DOI： 10.15980/j.tzzz.2014.02.030.

Wang Yongming, Huang Aihua, Zhang Jianguo, et al. Analysis of Factors Influencing Metallurigical Defects in Slender Grain-Fined Blades. [J]. Special Casting & Nonferrous Alloys 34(2):191-193(2014) DOI： 10.15980/j.tzzz.2014.02.030.

摘要

通过对薄细长细晶低压涡轮工作叶片浇冒系统、型壳预热温度、型壳保温方式和浇注温度的调整

研究了铸造工艺参数及浇冒系统对铸件浇不足、冷隔、晶粒度及缩松缺陷的影响。结果表明

采用填砂或保温毡包裹进行型壳保温

对叶片晶粒粗大、浇不足、冷隔和缩松等缺陷的影响相同。当型壳预热温度高于1 150℃时

导致细长叶片晶粒粗大;而当型壳预热温度为1 100℃

浇注温度为1 450℃时

容易出现浇不足和冷隔。当型壳预热温度为1 100℃

浇注温度为1 500℃时

能够有效避免冷隔、浇不足、晶粒粗大等缺陷

同时

通过浇冒系统改进

能够解决薄壁细长叶片缩松问题。

Abstract

Through adjusting gating-riser system

pre-heating temperature of mold shell

holding ways of mold shell and pouring temperature of thinned-slender grain-fined blade for low pressure turbine

effects of processing parameters and gating-riser system on cold-shut

misrun

grain size and shrinkage porosity in the alloy blades were analzyed.The results reveal that with pre-heating temperature of mold shell more than 1 150 ℃

gain size in the blades becomes coarse

while pre-heating temperature of 1100℃and pouring temperature of 1 450 ℃

misrun and cold shut defects in the blades can be often observed.With pre-heating temperature of 1 100 ℃and pouring temperature of 1 500 ℃

misrun

cold shut and grain coarseness in the blades can be eliminated effectively.In addiiton

through modifying gating-riser system

shrinkage porosity in the blades can be avoided.