surface blowhole

No surface blowhole formed in cast pipe when the amount of gas evolution from the coating of pipe model for water-cooled centrifugal cast was less than 5.5mL/g.

当水冷法管模涂料发气量≤55mL/g时，铸管表面不产生气孔缺陷。

Study on Making Use of Graphitizing Expansion to Eliminate Surface Blowhole of Ductile Cast Iron

利用石墨化膨胀消除球铁皮下气孔的研究

Study of Influence Factors on Surface Blowhole in Ductile Iron Casting

球铁件皮下气孔影响因素的研究

Discussing various influence factors of ductile iron's surface blowhole defects indicates that bringing various gases in the molten metal or on the interface with the sand mould is inevitable.

对影响球墨铸铁件皮下气孔的各种因素分析表明，铁液中气体的产生有其必然性，通过减少气体的发生量以防止皮下气孔的方法并不是都能奏效。

Due to the special structure and strict technical requirements of the front shock absorber sleeve of motorcycle, which leads to casting defects, such as shrinkage porosity, surface blowhole, are very easy to occur in production.

铝合金摩托车液压式前减震器筒体特殊的结构、严格的技术要求，导致生产中铸件很容易出现缩松、皮下气孔等缺陷。

The test shows that no surface blowhole formed when the amount of gas evolution was less than 5ml/ g.

试验表明，只要涂料发气量小于5ml/g，铸管不会产生表面气孔。