鑄鐵의 ARC熔接과 熔接龜裂에 關하여 = Report on the Arc Welding and the Welding Crack to the Cast Iron

다국어 초록 (Multilingual Abstract)

As it is hard to joint cast iron by the shielded metal are welding, many efforts are concentrated in developing its weldability.
The difficult point in the metal are welbing is to prevent the hardening and abnormal expansion of fusion metal by a rapid cooling rate.
The structure in welding point has been examined to prevent the crack after welding at the normal temperature.
The results are as follows :
1) Metal are electrodes and fluxes should be controled to contain the silicon which helps carbon to become graphite and decreases the shrinkage of molten metal.
2) The slow cooling in welding point should be performed without preheating and postheating as possible.