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针对现行0.4%Mo含量的ZG70Cr3NiMo材质半自磨机衬板淬硬层偏浅的问题,在不改变冷却方式的基础上,利用计算机模拟技术探讨通过成分调整增加淬硬层深度的可行性。针对ZG70Cr3NiMo半自磨衬板用钢,该研究采用正交试验的方法,分析Mo、Si、Cu、Mn等不同合金元素及其含量对材料淬透性的影响,探讨了各合金元素配比和合金力学性能的关系,最终确定最佳Mo含量以及其他合金元素的种类及含量。研究结果表明,C0.7Si0.8Mn0.9Mo0.7Ni0.5Cr3.2Cu0.6合金成分为最优配比,性价比最高,其马氏体转变温度Ms为147℃,淬火硬度为59.4~59.5 HRC;对比现行成分,优化成分的淬透性得到极大的提升,同时获得优良的力学性能。
Aiming at the problem that the existing hardened layer of ZG70Cr3NiMo semi-autogenous mill lining with 0.4% Mo content is too shallow, the feasibility of increasing the hardened layer depth through composition adjustment is discussed by using computer simulation technology without changing the cooling mode. ZG70Cr3NiMo for ZG70Cr3NiMo semi-self-abrasion liner steel, the study orthogonal method was used to analyze Mo, Si, Cu, Mn and other different alloying elements and their influence on the material’s hardenability, discussed the ratio of alloying elements and Alloy mechanical properties of the relationship between the final determination of the best Mo content and other types of alloy elements and content. The results show that the composition of C0.7Si0.8Mn0.9Mo0.7Ni0.5Cr3.2Cu0.6 alloy is the best ratio, the highest cost performance, the martensitic transformation temperature Ms 147 ℃, quenching hardness 59.4 ~ 59.5 HRC; contrast The existing components, the optimization of the hardenability of the ingredients have been greatly improved, while access to excellent mechanical properties.