1. War in the Micro-World: Identification and Traceability of Endogenous vs. Exogenous Inclusions in Induction Melting
จุดสนใจ: Utilizing metallographic atlases and SEM/EDS analysis to distinguish between oxides and sulfides formed during the melting process (ภายนอก) and inclusions introduced by refractory spalling or contaminated charge materials (ภายนอก).
This section provides precision targeting for root-cause troubleshooting.
การรวมภายนอก: Products of internal chemical reactions (เช่น, deoxidation products like $Al2O3$ or sulfides like MnS). Usually small and uniformly distributed.
การรวมภายนอก: “Foreign invaders” such as slag entrapment or refractory grains (เช่น, MgAl2O4 spinel from liners). Usually larger with complex, irregular morphologies.
2. More Than Just a Cover: Selection and Timing of Covering Agents (Insulating & Refining Fluxes)
จุดสนใจ: An in-depth exploration of the chemical compositions and physical properties of various fluxes. We discuss the “when” และ “how much” of additions, and how to select functional agents—for insulation, atmospheric isolation, or inclusion adsorption—based on the specific alloy (เช่น, High Manganese Steel เทียบกับ. Tool Steel).
- Key Insight: Choosing the right basicity ($V$-ratio) and melting point to ensure the flux actively traps floating inclusions rather than just providing thermal insulation.
3. The Filtration Revolution: Application of Ceramic Foam Filters (CFF) in Induction Furnace Tapping Spouts
จุดสนใจ: Introducing the integration of filtration units directly into the tapping system to physically intercept microscopic inclusions. We analyze the suitability of different materials (เช่น, Zirconia, ซิลิคอนคาร์ไบด์) and pore densities (PPI) for various molten metals, as well as their impact on pouring fluidity.
- กลไก: Moving beyond simple physical screening to leverage “Deep Bed Filtration,” where fine inclusions are captured by inertial impaction and Cake Filtration.
