气孔(俗称气眼、气泡、呛火)是常见的铸造缺陷之一。据统计,湿型铸铁件,因气孔而造成的废品约占总废品量的一半。就其产生原因来说,可分为侵入性气孔,析出性气孔和反应性气孔三类,其大致形状见图1。一、侵入性气孔气体从金属外部侵入液体金属而形成的气孔称为侵入性气孔。它的特征是出现在铸件个别地方,体积较大,多呈 Stomata (commonly known as the eye, bubble, choke fire) is one of the common casting defects. According to statistics, wet cast iron parts, due to stomatal waste accounted for about half of the total amount of waste. For its causes, can be divided into invasive stomatal, precipitated pores and reactive stomatal three categories, the general shape shown in Figure 1. First, the invasive stomatal gas Invasion of liquid metal from the metal outside the formation of stomata called invasive stomatal. It is characterized by the presence of individual parts of the casting, larger and more often