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Thermophysical properties of molten stainless steel containing 5mass%B$$_{4}$$C

5mass%B$$_{4}$$C含有ステンレス鋼溶融物の熱物性

福山 博之*; 東 英生*; 山野 秀将

Fukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa

316Lステンレス鋼溶融物(SS316L)及び5mass%B$$_{4}$$C含有SS316Lの密度,表面張力,輻射率,熱容量及び熱伝導率を測定するために、静磁場印加電磁浮遊法を用いた。5mass%B$$_{4}$$CをSS316Lに加えることで、液相温度,密度,輻射率及び熱伝導率において、SS316Lの液相温度で、それぞれ111K, 6%, 19%, 6%減少した。熱容量は、この追加により5%まで増加した。表面張力に関して、5mass%B$$_{4}$$Cの追加による影響は明確には認められなかったが、SS316Lに溶解した硫黄により表面張力が大幅に減少した。

An electromagnetic-levitation technique performed in a static magnetic field was used to measure the density, surface tension, normal spectral emissivity, heat capacity, and thermal conductivity of molten 316L stainless steel (SS316L) and SS316L that contained 5mass%B$$_{4}$$C. The addition of 5mass%B$$_{4}$$C to SS316L yielded reductions of 111 K, 6%, 19%, and 6% in the liquidus temperature, density, normal spectral emissivity, and thermal conductivity at the liquidus temperature of SS316L, respectively. The heat capacity increased by 5% with this addition. Although the 5mass%B$$_{4}$$C addition had no clear effect on the surface tension, sulfur dissolved in the SS316L resulted in a significant decrease in the surface tension.

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