硅系耐热球铁的脆性研究  

RESEARCH OF BRITTLENESS OF SILICON BEARING HEAT-RESISTING NODULAR IRON

作　　者：古可成[1] 顾玉娜[1] 李义尧 毛晓禹 陈廉[3] 佟敏[3] 

机构地区：[1]沈阳工业大学 [2]辽宁理化分析研究测试中心 [3]中国科学院金属研究所

出　　处：《钢铁》2001年第1期56-59,共4页Iron and Steel

摘　　要：试验结果表明 ,铸态硅系耐热球铁固溶了一定数量的氢 ,它随硅原子溶入α- Fe而自发溶入 ,并在某些晶面形成偏析、导致氢脆。硅脆性与氢脆性的交互作用是硅系耐热球铁脆裂的实质。脆性裂纹多发生于石墨球 /金属基体界面 ,这里也有氢的富集。The experiment has proved that in silicon bearing heat resisting nodular iron some amount of hydrogen are spontaneously dissolved into α Fe with silicon,and the segregation of hydrogen on crystal plane causes brittleness.The interaction effect of silicon brittleness and hydrogen brittleness is the essence of brittle cracking of silicon bearing heat resisting nodular iron.Brittle cracking often occurs at interface between nodular graphite and matrix where hydrogen is enriched.

关 键 词：耐热铸铁 硅脆 氢脆 

分 类 号：TG14[一般工业技术—材料科学与工程]