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一、序铸铁件是脆弱的这一概念,近年来正逐渐得以纠正。特别是球墨铸铁的出现,显著地改善了韧性,说它达到了可与钢媲美的韧性也不过份。但由于强韧性钢的研制进展很快,故两者之间仍有差距。如将超高强度钢等材料称为“高强度脆性材料”,则铸铁仍应列为低强度脆性材料。最近,由于低温工业的发展,要求使用的材料在低温脆性方面具
First, the concept of sequential cast iron is fragile, in recent years is gradually being corrected. In particular, the advent of ductile cast iron has significantly improved its toughness, saying that it achieves comparable toughness to steel. However, there is still a gap between the two due to the rapid development of tough steel. Such as the ultra-high-strength steel and other materials known as “high-strength brittle materials,” the cast iron should be classified as low-intensity brittle material. Recently, due to the development of the low-temperature industry, the materials required to be used are low-temperature brittleness