چکیده مقاله
Compound casting enables the joining of similar or dissimilar metals by direct casting In this approach, bonding is established between a solid metallic insert and a molten alloy through interfacial diffusion across the solid liquid boundary In the present study, the bonding characteristics between AISI 1035 plain carbon steel solid insert and a high carbon, high chromium wear resistant cast iron molten alloy produced by compound casting were investigated Interfacial microstructure and joint properties were characterized using optical microscopy, SEM, EDX, XRD, tensile testing, and microhardness measurements Two preheating temperatures 25 and 350 °C and two insert surface conditions smooth and grooved were considered as variable parameters Compound casting was performed in sand molds: the steel insert was positioned inside the mold and molten cast iron at 1400 °C was poured to create a butt joint configuration Microstructural observations revealed four successive regions from the steel side toward the cast iron: interfacial, dendritic, diluted, and fine equiaxed zones This microstructural gradient became more pronounced in specimens preheated to 350 °C In the preheated, grooved samples, the interfacial zone narrowed and bonding quality improved, indicating enhanced mixing/alloying and diffusion of alloying elements from cast iron into steel In the dendritic zone, growth changed from planar to dendritic and γ dendrites advanced from the interface into the remaining melt opposite to the heat flow direction Preheating reduced dendrite length and increased the extent of the fine equiaxed zone In the diluted zone, solute rejection from dendrites promoted eutectic γ M23C6 constituent The fine equiaxed zone consisted of a γ solid solution matrix Fe C Cr Ni Mn Mo with hexagonal and rod like carbides The hardness profile increased from steel to cast iron, with a sharp drop in the diluted zone due to the eutectic The smooth, unheated insert exhibited the lowest fracture strength, whereas the grooved insert preheated to 350 °C showed the highest strength, reaching ~100 MPa
کلیدواژهها
نویسندگان
Reza Azizi Hamami
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Masoud Kasiri-Asgarani
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Alireza Alaei
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Mojtaba Naalchian
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
شیوه ارجاع
Azizi Hamami, Reza and Kasiri-Asgarani, Masoud and Alaei, Alireza and Naalchian, Mojtaba,1404,Investigation of the Microstructural and Mechanical Properties of a Dissimilar Joint between AISI 1035 Steel and High-Chromium White Cast Iron Produced by the Compound Casting Process,8th International Conference on Welding and Non Destructive Testing & 26th National Conference on Welding & Inspection & 15th National Conference on NDT & 4th National Conference on Additive Manufacturing,Tehran
ارائهشده در
مجموعه مقالات هشتمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب، بیست و ششمین کنفرانس ملی جوش و بازرسی، پانزدهمین کنفرانس ملی آزمایش های غیرمخرب و چهارمین کنفرانس ملی ساخت افزایشی20 بهمن 1404 · تهران