摘要
对高硅球墨铸铁的脆化现象及本质进行了实验研究．结果表明：随着含硅量的增加，脆性增加，并发现含硅４．４６％～５．０９％时，冲击韧性急剧下降，这一急剧转变点（即硅脆点）同时又是α固溶体晶格从无序到有序的转变点．指出合金有序化是导致硅脆现象根本原因。
Brittleness of high silicon nodular cast iron is studied to show that brittleness is increased with increase of content of silicon,and impact value is reduced at 4.46%￣ 5.09% Si and order disorder transformation of solid solution is produced at 4.46%￣5.09% Si,A new viewpoint according to which order disorder transformation is considerable to produce brittleness of high silicon cast iron is presented,and method by which brittleness may be eliminated is also presented
关键词
脆性
球墨铸铁
硅脆现象
消除法
Mechanical properties of materials
Cast iron
Brittleness
Order disorder transformation.
