本发明公开一种缺陷少、耐腐蚀性能好的耐事故FeCrAl包壳材料及其制备方法。通过适当控制的Cr、Al等主元素和优选Mo、Si、W、Y等微合金化元素的成分，采用小变形、多道次的加工方法或3D打印技术，制备具有优良抗腐蚀性能、抗高温氧化性能、抗辐照性能，且缺陷少、力学性能满足耐事故燃料要求的FeCrAl合金包壳。此种包壳管克服了现有FeCrAl合金包壳管存在的辐照脆化严重、加工困难的问题，且可实现其大规模工业化生产。

The invention discloses a preparation method for ATF FeCrAl cladding material with few defects and high corrosion resistance. Through proper control of the majority elements Cr,Al and the minority elements Si, W, Y in the FeCrAl alloys, meanwhile, small deformation,multi-channel time processing methods or 3D printing technology was applied, the preparation of excellent corrosion resistance,hihh temperature oxidation resistance,high radiation resisitance and mechanical preformance meet the requirements of FeCarAl cladding can be achieved.This kind of cladding overcomes the problems of severe irradiation embrittlement and processing difficulty , and can realize large-scale industrial production.