Aluminum castings often encounter air-oxidized welds. Most of this substance is dispersed on the surface of aluminum castings, and some are scattered around the corners where there is no ventilation. Most of its port numbers are Shows yellow or off-white. It can be seen in the case of machining and manufacturing, and it can also be found in the case of pickling passivation or acid treatment to produce such aluminum castings and steel molds. There are several aspects: the material in the furnace is not clean and tidy , The use of recycled waste is too large; the pouring system software of the design scheme is not very effective; the slag removal in the aluminum alloy liquid of aluminum castings is not clean; in the case of pouring, the slag is also removed due to insufficient standards in the actual operation. Take it; and it's not long to avoid quiet after the scouring and deterioration treatment.

Generally speaking, if this kind of problem is to be dealt with reasonably, everyone must grasp the effective standard pouring rate, and minimize the inclusion of steam as well; organic chemicals cannot be mixed in the core sand. To this end, the raw material gas supply is reduced; the exhaust pipe function of the core sand is improved to make it stronger; the high-quality cold iron is effectively used; the disadvantages of the design scheme of the gating system software are improved.