METHOD FOR MANUFACTURING HYPEREUTECTIC Al-Si ALLOY PARTICLE, AND HYPEREUTECTIC Al-Si ALLOY PARTICLE

• Main Author: NAKAZAWA SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hypereutectic Al-Si alloy particle with a uniform composition by thermal diffusion of each elements between solid phases.SOLUTION: There is provided a method for manufacturing a hypereutectic Al-Si alloy particle by housing a mixture by uniformly mixing an Al powder and a Si powder as a reaction assistant together with halide of an alkali metal in a crucible, and heat treating them at a temperature of 660 to 750°C for 5 hr. or more after evacuation.SELECTED DRAWING: Figure 1 【課題】固相−固相間で互いの元素の熱拡散によって、均一な組成の過共晶Ａｌ−Ｓｉ合金粒子を製造する方法を提供する。【解決手段】Ａｌ粉末とＳｉ粉末とを均一に混合した混合物を反応助剤としてのアルカリ金属のハロゲン化物とともにるつぼ内に収納し、真空排気後に、６６０〜７５０℃の温度で５時間以上保持し熱処理して、過共晶Ａｌ−Ｓｉ合金粒子を製造する方法である。【選択図】 図１