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一目的钢铸件的废品中,因氣孔和裂纹而報废的最多。在有的工场中,因裂纹而報废的铸件,竟佔全部废品的40%以上。發生裂紋的原因和防止方法,研究者頗多,已有不少文可供查考。在實際工作中,大都根據各种經验,而後採用種種預防措施。以铸件而論,研究發生裂纹的原因時,自不能忽視铸模的情况;但材料的品質,也很重要,不能轻视。以從事煉鋼工作者的立场而論,如能查明鋼的成份和發生裂紋現像的关係,对铸造工作,必有极
Among the scraps of a target steel casting, the most scrapped due to air holes and cracks. In some workshops, castings scrapped due to cracks accounted for more than 40% of all scrap. There are many researchers and reasons for the occurrence of cracks and prevention methods. There are many documents available for examination. In practical work, most of them are based on various experiences and then adopt various preventive measures. In terms of castings, when studying the causes of cracks, the mold cannot be neglected. However, the quality of materials is also very important and cannot be ignored. From the standpoint of steel-making workers, if it is possible to identify the relationship between the composition of steel and the appearance of cracks, it will be necessary for casting work.