在整个机械行业中,铸铁件以其抗震性好及价格低廉而被广泛地应用。铸铁件有塑性和韧性差的缺点,受拉力时容易折断或产生裂缝,该裂缝若采用焊接来修复,焊接接头易产生白口铁或有的裂缝焊不透,因此铸铁件裂缝用焊接法修复是不可靠的。我们用金属扣合法——冷态修理法修复立车横梁裂缝(图1)介绍如下: Throughout the machinery industry, cast iron parts are widely used for their good shock resistance and low cost. Cast iron parts have poor plasticity and toughness, easy to break or produce cracks under tensile force. If the cracks are repaired by welding, the welded joints are easy to produce white iron or some cracks can not weld, so the cracks of the cast iron are repaired by welding Is not reliable. We use the metal buckle law - cold repair repair vertical car beam cracks (Figure 1) are described below: