Viscosity measurements of molten stainless-steel containing boron-carbide

炭化ホウ素含有溶融ステンレス鋼の粘度測定

西 剛史*; 太田 弘道*; 小久保 宏紀*; 佐藤 理花*; 山野 秀将   

Nishi, Tsuyoshi*; Ota, Hiromichi*; Kokubo, Hiroki*; Sato, Rika*; Yamano, Hidemasa

本研究では、溶融SS(SUS316L)合金の粘度(2.5mass%BC-SS,5.0mass%BC-SS,7.0mass%BC-SS,10mass%BC-SS)をるつぼ回転振動法により、それぞれ1613-1793K, 1713-1793K, 1793-1823Kの温度範囲で粘度を測定した。その結果、粘度は0-7.0mass%の範囲でBC成分の増加につれて増加した。溶融BC-SS合金の粘度評価式は、1713-1793Kの温度範囲の2.5mass%, 5.0mass%, 7.0mass%の溶融BC-SS合金の実験データから、以下とした。y=Ax+B, A=0.0302, B=-9.88110T+2.546。ただし、xはBC成分、Tは温度である。本評価式の不確かさは2.5%である。

In this study, the viscosities of the molten SS (SUS316L), 2.5mass%BC-SS, 5.0mass%BC-SS, 7.0mass%BC-SS and 10mass%BC-SS alloys were measured by the oscillating crucible method. The viscosity measurements of the molten SS, 2.5mass%BC-SS and 5mass%BC-SS, 7mass%BC-SS and 10mass%BC-SS alloys were performed in the temperature range from 1613 to 1793 K, from 1713 to 1793 K, and from 1793 to 1823 K, respectively. In these results, the viscosity increased with BC components in the BC components range from 0 to 7.0mass%. The equation of viscosity of molten BC-SS alloys was estimated by using the experimental data of the molten 2.5mass%BC-SS and 5.0mass%BC-SS, and 7.0mass%BC-SS in the temperature range from 1713 to 1793 K. The equation of viscosity of molten SS+BC alloys was determined as follows. y=Ax+B, A=0.0302, B=-9.88110T+2.546, where x is the BC component and T is the temperature. The uncertainty of the equation is 2.5%.