Norem02, an Fe-based alloy with a high carbon and chromium content, is elaborated by hot isostatic pressing (HIP). HIP is an attractive pressure-assisted sintering technique allowing for the elaboration of dense fine-grained materials from metal powder placed in a container. AISI 316L and 304L stainless steels were chosen as container materials. Two kinds of Norem02 powders of different particle-size distributions yet rather similar chemical compositions were tested. Detailed investigations of the interfacial zone between the Norem02 and stainless steel container were performed. In both HIPed samples, a microstructural transition band of approximately 500-700 µm was found within the Norem02 near the austenitic container. The presence inside Norem02 of coarse M₂₃C₆-type carbides, as well as ferrite, was highlighted. Silicon and manganese enrichment and nickel depletion were revealed in the 316L and 304L steels. χ-phase formation was confirmed at the Norem02 grain boundaries, depending on sintering temperature and on the composition of the initial powder. σ-phase was not detected, suggesting incomplete transformation of χ-phase. Finally, carbon diffusion inside the austenitic steel was noted and quantified and a diffusion coefficient was calculated. Despite the formation of carbides inside the 304L, experimental results suggest that the carbon diffused mainly in solid solution.

Norem02是一种具有高碳和铬含量的铁基合金，可通过热等静压（HIP）进行精加工。HIP是一种有吸引力的压力辅助烧结技术，允许从放置在容器中的金属粉末中加工出致密的细粒材料。选择AISI 316L和304L不锈钢作为容器材料。测试了两种具有不同粒径分布但化学成分相似的Norem02粉末。对Norem02和不锈钢容器之间的界面区域进行了详细研究。在两个HIP样品中，在奥氏体容器附近的Norem02中发现了大约500-700 µm的微结构过渡带。粗M ₂₃ C ₆在Norem02中的存在型碳化物以及铁素体被突出显示。在316L和304L钢中发现了硅和锰的富集和镍的消耗。取决于烧结温度和初始粉末的组成，在Norem02晶界确认了χ相的形成。未检测到σ相，表明χ相转化不完全。最后，记录并量化了奥氏体钢内部的碳扩散，并计算了扩散系数。尽管在304L内部形成了碳化物，但实验结果表明，碳主要在固溶体中扩散。