摘要
阐述解决精密铸件孤立热节及型壳散热性差而导致的缩孔、缩松缺陷的工艺方法,采用型壳局部激冷处理、保温+型壳局部水淬处理、保温+局部喷水激冷处理、增加补缩筋、设置冒口补贴、改变浇冒口设计方式,改善散热条件,避免局部过热等工艺方法,保证补缩通道畅通,使温度场分布均匀,营造铸件顺序凝固条件,使其顺序凝固,可解决熔模铸件的缩孔、缩松倾向。
Processing measures were described of solving shrinkage porosities（holes）which were formed as a result of over-thermal of isolated hot spot and poor heat dissipation of mold shell in investment castings.Some measures were adopted to ensure smooth feeding channel and uniform temperature distribution to realize sequential solidification of filling process,such as partial mold shell chilling,insulation＋partial mold shell water quenching,insulation＋partial spraying water treatment,adding feeding rib,setting riser subsidiary,modifying pouring-riser design,improving heat dissipation condition and avoiding localized over-heat,successfully eliminating shrinkage porosities（holes）tendency.
作者
谭培松
Tan Peisong(Hebei Anji Hongye Machinery Co.,I.td)
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2018年第7期744-747,共4页
Special Casting & Nonferrous Alloys
关键词
水淬激冷
热节
补缩通道
温度场
补缩筋
Water Quenching
Hot Spot
Feeding Channel
Temperature Field
Feeding Rib
