ANR_Graded hybrid composite steel sheet for packaging applications

从食品和饮料容器到封口和器皿，包装钢被用于无数的日常产品。这种钢的应用越来越需要高成形性和高强度的组合。对于日益复杂的形状要求成形性，而改进的强度允许减少板材厚度，从而节省重量。与这些设计约束相结合的是成本、可回收性和表面特性。这样的性能组合很难实现，因此传统上对包装钢的强度和厚度施加限制。在这项建议中，我们试图通过使用一种新的工艺路线来克服传统强化机制在超低碳包装钢中施加的限制，该工艺路线涉及在薄钢板表面蒸气沉积一层高度过饱和的碳铁。随后将进行控制退火，以生成成分梯度的混杂复合材料。这条路线将允许产品强度的大幅提高，而不会显著降低与用于包装钢的传统强化方法相关的延展性。此外，这种加工路线与包装钢材的流动相兼容(包括后续的涂层技术)，而且由于它只涉及向薄板中添加碳，因此不会降低材料的可回收性。该项目属于NSERC战略拨款优先领域的竞争性制造，分主题为混杂复合材料。此外，该项目是根据NSERC-ANR同时呼吁联合研究提案提交的。加拿大团队在材料制造和机械测试方面的专业知识与法国人建立了一个高度合作的研究项目

Packaging steels are used in a myriad of everyday products from food and beverage containers to closures and utensils. This application of steel increasingly requires a combination of high formability with high strength. Formability is demanded for increasingly complex shapes while improved strength allows for reduced sheet thickness resulting in weight savings. Coupled to these design constraints are cost, recyclability and surface characteristics. Such combinations of properties are difficult to achieve and thus limits are traditionally placed on the strength and thickness of packaging steels. We seek in this proposal to overcome the limitations imposed by traditional strengthening mechanisms in ultra-low carbon packaging steels through the use of a novel processing route involving the vapour deposition of a thin layer of iron highly supersaturated in carbon to the surface of thin steel sheet. This will be followed by controlled annealing to generate a compositionally graded hybrid composite. This route will allow for substantial increases in strength of the product without the significant decrease in ductility associated with conventional strengthening methods used for packaging steels. Moreover, this processing route is compatible with the flow of packaging steels (including subsequent coating technologies) and as it only involves the addition of carbon to the sheet, it does not degrade the material's recyclability. This project falls under the NSERC strategic Grants priority area of Competitive Manufacturing in the sub-topic of hybrid composite materials. Moreover, this project is being submitted under the NSERC-ANR Concurrent Call for Joint Research Proposals. A strongly collaborative research project has been built combining the expertise of the Canadian team in materials fabrication and mechanical testing with the French