To meet the needs of laser cladding remanufacturing of key parts with both corrosion and wear resistance, the “material genetic” design method was used to deduce the composition of alloy powder with the microstructure of corrosion and wear-resistant key genetic phase from the target performance of materials. The research was conducted based on the typical phase theory of traditional Fe-based alloys such as martensitic and carbide wear-resistant microstructure and austenitic and Cr-rich passivated film corrosion-resistant microstructure. A material gene design database system based on the matching design of corrosion and wear-resistant phase key genes was successfully constructed by building an atheoretical prediction model and optimizing 10,935 sets of candidate Fe-based alloy compositions using computer algorithms and thermodynamic calculations. Finally, a new 50Cr12Ni3Mo2W6Co5BSiTi3CeO₂ Fe-based alloy composition with both good wear resistance and high corrosion resistance was obtained by optimizing the design. The laser cladding formability of the designed alloy was verified and the correspondence between the key genetic microstructure and the corrosion and wear resistance was characterized with optimized process parameters. The results show that the laser cladding has good formability. The microstructure of the cladding consists of martensite and Cr₂₃C₆ carbides with the characteristics of wear-resistant key genes and austenite and Cr-rich passivation film with the characteristics of corrosion-resistant key genes. The new laser cladding of Fe-based alloy shows better corrosion and wears resistance than the 50Cr6Ni2Y alloy prepared by traditional composition design methods. We hope that this research can provide a new approach to the design of alloy compositions for laser cladding remanufacturing of Fe-based parts with both corrosion and wear resistance.

为满足激光熔覆再制造兼具耐腐蚀性和耐磨性的关键零件的需求，采用“材料遗传”设计方法，从目标性能推导出具有腐蚀和耐磨关键遗传相显微组织的合金粉末的成分。的材料。研究基于传统铁基合金的典型相理论，如马氏体和碳化物耐磨组织和奥氏体和富铬钝化膜耐腐蚀组织。通过建立理论预测模型，利用计算机算法和热力学计算优化10935套候选铁基合金成分，成功构建了基于腐蚀和耐磨相关键基因匹配设计的材料基因设计数据库系统。₂通过优化设计获得了兼具良好耐磨性和高耐蚀性的铁基合金成分。验证了设计合金的激光熔覆成形性，并通过优化工艺参数表征了关键遗传微观结构与耐腐蚀耐磨性之间的对应关系。结果表明，激光熔覆具有良好的成型性。包层的显微组织由马氏体和Cr ₂₃ C _6组成具有耐磨关键基因特征的碳化物和具有耐腐蚀关键基因特征的奥氏体和富铬钝化膜。与传统成分设计方法制备的50Cr6Ni2Y合金相比，铁基合金的新型激光熔覆具有更好的耐腐蚀性和耐磨性。我们希望这项研究能够为激光熔覆再制造具有耐腐蚀性和耐磨性的铁基零件的合金成分设计提供一种新方法。