ホウ化物の少量複合添加によるTiB<sub>2</sub>添加低合金焼結鋼の高密度・高ヤング率化

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  • Improvement of Density and Young’s Modulus of TiB<sub>2</sub> Reinforced Low-alloyed Sintered Steel by Small Amount Addition of Boride Powder
  • ホウ化物の少量複合添加によるTiB₂添加低合金焼結鋼の高密度・高ヤング率化
  • ホウカブツ ノ ショウリョウ フクゴウ テンカ ニ ヨル TiB ₂ テンカ テイゴウキン ショウケツコウ ノ コウミツド ・ コウヤングリツカ

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<p>To obtain a significantly higher Young’s modulus than conventional wrought steels, the improvement of the sintered density was necessary for low-alloyed sintered steels containing 15 vol% or more TiB2. In this study, the effect of boride powders as the small amount additives on the sintered density and the Young’s modulus of TiB2 reinforced low-alloyed sintered steels was investigated.</p><p>A small amount addition of ZrB2 powder was suitable to increase the sintered density of low-alloyed sintered steels containing 15 vol% or more TiB2, because of promoting the infiltration of the liquid phase formed during sintering into the agglomerates of TiB2 particles. As a result, the high sintered density equivalent to 97% of pore free density and the high Young’s modulus of 300 GPa equivalent to 1.5 times that of conventional wrought steels were achieved when the content of TiB2 was 40 vol%.</p>

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