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大家知道,对于损壞的金属制品,最通用、最快、最经济而可靠的修理方法之一,是焊接法。但是,由于生铁的特性——很小的受范性(脆性)和焊接时发生的所谓‘硬化’的特性——生铁的焊接就感困难。生铁的受范性小,很难经得起焊接时所产生的张应力和弯曲应力。焊接时加热不均勻,在生铁内引起应热力,这种应力一般使焊接零件在裂缝以外的地方,大抵在与焊缝并列的地方发生破壞。生铁由于含炭量高而具有的另一性质,是使焊缝上
As we all know, one of the most versatile, fastest, most economical and reliable repairs to damaged metal products is the welding method. However, it is difficult to weld the pig iron due to the characteristics of the pig iron - very small bore (brittleness) and the so-called “hardening” characteristic occurring during welding. Pig iron by the small size, it is difficult to withstand the tensile stress generated when welding and bending stress. Uneven welding heating, causing heat in the pig iron, the stress of the general welding parts outside the cracks, probably in parallel with the weld damage occurred. Another property that pig iron has because of its high carbon content is to make welds on it