AerMet100钢的研究与发展

以AerMet100钢专利和AMS标准的变迁为基础,结合近年来国外AerMet100钢研究内容和材料院相关的研究工作,理出提高AerMet100钢断裂韧度研究的思路.不断提高纯洁度是AerMet100钢断裂韧度提高的重要条件之一;通过多元微量稀土元素改变杂质元素的状态和空间分布,可以有效减少杂质元素对断裂韧度的危害;热处理形成的稳定的逆转变奥氏体对断裂韧度起到积极作用.

Research and Development of AerMet100 Steel

Since the publication of U.S. Patent and AMS specifications of AerMet100 steel,A lot of changes have taken place about the criteria stipulated in these technical documents.Considering these changes,combining the achievements gained in our researches engaged in the BIAM and consulting the technical papers published abroad,we drew out some ideas about improving the fracture toughness of AerMet100 steel.Continuing increasing the purification and cleanliness would be one of the most important measures;adding multiple rare earth elements as trace constituents would change the composition and size of the inclusions as well as improve the distribution of these inclusions,so the inversion effect of the inclusions on fracture toughness would be reduced.The stable reverted austenite formed during heat treatment would be positive to the fracture toughness.