发明名称 |
METALLIC GLASS FASTENING SCREW |
摘要 |
A metallic glass fastening screw that is not susceptible to loosening, and is capable of implementing fastening with high strength and reliability. In processing a screw thread and a screw groove of a screw, amorphous bulk metallic glass is form-rolled at glass transition temperature or less of the bulk metallic glass serving as a member to be processed. The bulk metallic glass has a plastic strain property introduced by plastic working such as form rolling, to improve ductility. A relationship of d>0.022×D is set so that a depth from a bottom of the screw groove in the region where the plastic strain is introduced is d and an outside diameter of the screw is D, to relax stress concentration of tensile stress generated in a region at the bottom of the screw groove due to tension (axial force) applied to the screw in fastening.
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申请公布号 |
US2013022427(A1) |
申请公布日期 |
2013.01.24 |
申请号 |
US201013574498 |
申请日期 |
2010.06.22 |
申请人 |
TOHOKU UNIVERSITY;MARUEMU WORKS CO., LTD.;YAMANAKA SHIGERU;CHATANI MASAHIRO;SAOTOME YASUNORI;AMIYA KENJI |
发明人 |
YAMANAKA SHIGERU;CHATANI MASAHIRO;SAOTOME YASUNORI;AMIYA KENJI |
分类号 |
F16B33/02;B21H3/02;F16B35/00 |
主分类号 |
F16B33/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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