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我们在今年《铸工》第6期上对用底注包消除球墨铸铁中的黑点作了初步报导,其中曾提出几个初步看法,主要内容为:1.黑点夹渣是在铁水进入型腔以前就生成;2.底注包有可能澈底消除黑点夹渣,但要给铁水以一定的包内停留时间;3.不宜在处理后为争取较高温度而立刻浇注,守可牺牲一些浇注温度而停留一定时间,让黑点夹渣有充分时间在铁水中上浮,但不否认浇注漫度高是好的;4.建议采用茶壶包撇除黑点夹
In this year’s “Casting” No. 6 on the end note to eliminate the black spots in the ductile iron made a preliminary report, which made a few initial observations, the main contents are as follows: 1. Black spot slag is in the hot metal into the type 2. Cavity before the package may be completely eliminate the black spots of slag, but to give a certain amount of iron to stay within the package time; 3. Should not be treated immediately after the fight for higher temperatures pouring, keep sacrifice some Pouring temperature and stay for a certain period of time, so that the black spot slag residue has enough time to float in the hot metal, but does not deny the high degree of pouring is good; 4.