@article{oai:ptu.repo.nii.ac.jp:00000107,
 author = {山浦 , 真一 and 矢野 , 友就 and 佐藤 , 樹 and 古屋 , 有務 and 奥屋 , 和彦 and Yamaura, Shin-ichi and Furuya, Amu and Okuya, Kazuhiko},
 issue = {2},
 journal = {技能科学研究　Vol37 no2 2020},
 month = {Sep},
 note = {In this work, tightening axial force, Vickers hardness and microstructure of torshear-type high strength bolts heattreated
in various conditions were studied. As a result, it was found that the bolts heated at up to 673K did not show
a significant decrease in tightening force and Vickers hardness and the bolts heat-treated at the temperature higher
than 673K did. This is because the tempering temperature for the bolts after quenching in manufacturing process is
close to 673K. However, the bolts heated at 1073K and subsequently water-quenched showed a significant increase
in Vickers hardness due to the formation of martensite phase by quenching from austenite phase. Moreover, the slip
factors of friction-type high strength bolted joints with pre-heated bolts were studied. As a result, it was found that
the slip factors almost kept constant when using the bolts heated at up to 673K, but the factors fell below 0.5 when
using the bolts heated at 773K and 873K.},
 pages = {11--17},
 title = {【論文】鋼構造用高力ボルトの金属微細組織および機械的強度に対する熱履歴の影響},
 volume = {37},
 year = {2020}
}