Scholarlink

<p>Investment casting technique, renowned for producing complex casting shapes accurately, involves primary coating of zircon sand over wax pattern followed by successive backup coatings of fused silica sand (FSS) for shell preparation. This study aims to access the suitability of blast furnace slag (BFS) as an alternative to FSS as a backup coating material in shell molding. To determine its suitability, shell molds were prepared using BFS as stucco for the backup coatings and compared to standard FSS-based shell molds, while keeping identical primary coating of zircon in both types of molds. The mold properties such as permeability, flexural strength, and hardness were evaluated and compared. The results reveal that BFS mold has low strength and hardness but possesses high permeability value than that of FSS-based molds. In addition to this, the aluminum alloy A356 was cast in both the molds. BFS mold castings revealed an average surface roughness of 1.267 µm, hardness of 93.13 BHN, and 1.09% porosity. The phase analysis and microstructure comparison of both casting suggest that BFS is feasible alternative to FSS in investment casting applications. Further research on an industrial scale is essential to fully understand its scalability and long-term sustainability.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Utilization of Blast Furnace Slag as Backup Coating Material in Investment Casting of A356 Alloy

  • 期刊论文

  • 发表日期：

    2026年3月10日

查看全文
  • Sourabh Jain,
  • Ramesh Kumar Nayak

摘要

Investment casting technique, renowned for producing complex casting shapes accurately, involves primary coating of zircon sand over wax pattern followed by successive backup coatings of fused silica sand (FSS) for shell preparation. This study aims to access the suitability of blast furnace slag (BFS) as an alternative to FSS as a backup coating material in shell molding. To determine its suitability, shell molds were prepared using BFS as stucco for the backup coatings and compared to standard FSS-based shell molds, while keeping identical primary coating of zircon in both types of molds. The mold properties such as permeability, flexural strength, and hardness were evaluated and compared. The results reveal that BFS mold has low strength and hardness but possesses high permeability value than that of FSS-based molds. In addition to this, the aluminum alloy A356 was cast in both the molds. BFS mold castings revealed an average surface roughness of 1.267 µm, hardness of 93.13 BHN, and 1.09% porosity. The phase analysis and microstructure comparison of both casting suggest that BFS is feasible alternative to FSS in investment casting applications. Further research on an industrial scale is essential to fully understand its scalability and long-term sustainability.