Improvements to the wear performance of CD4MCu (a cast Fe-Cr-Ni-Cu-Mo duplex stainless steel grade) would be of great benefit in pump applications. This study demonstrates that CD4MCu stainless steels reinforced with (Nb_0.75,Ti_0.25)C particles can be fabricated by simply melting the elements required for the CD4MCu stainless steel together with the amounts of Nb, Ti and C required to achieve a specific volume fraction of (Nb_0.75,Ti_0.25)C particles in a miniature laboratory argon arc furnace. Their potential as erosion resistant materials was evaluated through microstructural characterization, hardness testing, and sliding wear tests. The formation of (Nb_0.75,Ti_0.25)C particles was found to improve the bulk hardness of the CD4MCu stainless steels without significantly altering its duplex microstructure, which then led to better wear performance. The results indicate that large-scale casting of the proposed materials should be possible and that they have potential as erosion resistant materials.

CD4MCu（铸造的Fe-Cr-Ni-Cu-Mo双相不锈钢牌号）的磨损性能的改善将在泵应用中大有裨益。这项研究表明，可以通过简单地熔化CD4MCu不锈钢所需的元素以及达到特定体积分数的Nb，Ti和C的量，即可合成用（Nb _0.75，Ti _0.25）C颗粒增强的CD4MCu不锈钢。 （Nb _0.75，Ti _0.25）C颗粒在小型实验室氩弧炉中。通过微观结构表征，硬度测试和滑动磨损测试，评估了它们作为耐腐蚀材料的潜力。（Nb _0.75，Ti _0.25的形成发现C颗粒可改善CD4MCu不锈钢的整体硬度，而不会显着改变其双相组织，从而提高耐磨性能。结果表明，应有可能对建议的材料进行大规模铸造，并且它们具有作为耐腐蚀材料的潜力。