白銑の第1段黒鉛化に対する試料直径の影響

抄録

  First stage graphitization study was carried out by preparing different sizes of white iron specimen and examining the influence of casting size, slendering of specimen and reducing pressure of heating atmosphere on graphitization of white iron. It was clarified that graphitization was accelerated when casting size became small or when the specimen was slendered and heated under reduced atmospheric pressure. It was considered that graphitization originates from nucleating graphite at a void constructed during graphitization heating.