Nippon Steel Corporation

Gc Corporation

Takamitsu Takagi

Jun Nakamura

Hirokazu Okada

Keishi Matsumoto

Fumiya Sato

Yoshihiro Sakaguchi

Kiyoko Takeda

Masaki Ueyama

Masaaki Terunuma

Ryosuke Ikeya

Hiromitsu Date

Makoto Miyajima

Yusuke Noguchi

Tsuyoshi Noguchi

Eri Hoshiba

Akira Tsuto

Sayuri Iwata

Toru Kanatani

A method for producing a chemically treated alloy material is provided that suppresses a decrease in chemical treatability even in a case where chemical treatment is repeatedly performed. The method for producing a chemically treated alloy material of the present disclosure includes a chemical treatment step and a treatment solution regeneration step. In the chemical treatment step, an alloy material () is immersed in an oxalate treatment solution () containing oxalate ions and fluorine ions to perform a chemical treatment. In the treatment solution regeneration step, light is radiated to the oxalate treatment solution () during the chemical treatment and/or the oxalate treatment solution () after the chemical treatment.

Method for producing chemically treated alloy material, and chemical treatment solution regeneration apparatus used in method for producing chemically treated alloy material

The production method of a Ni-based alloy according to the present embodiment includes: a casting step of casting a liquid alloy which is a raw material of the Ni-based alloy to produce a Ni-based alloy starting material; and a segregation reducing step of performing, on the Ni-based alloy starting material produced by the casting step, heat treatment, or the heat treatment and complex treatment including hot working and heat treatment after the hot working, to satisfy Formula (1):

Method for producing ni-based alloy and ni-based alloy

For proper fitness of a core portion of an abutment to a patient, a wax model base for an abutment of a dental implant includes an engagement portionengaging with an implant fixture analog embedded in a gypsum model without rotation, a truncated conical portion, a building portionprovided directly on an inner peripheral edge of a ring-like first stepped portion, which is provided on an oral cavity inner side of the truncated conical portion, or through a cylindrical portionhaving a low height to have a conical shape expanding toward the oral cavity inner side and have a cutoff portionon an outer peripheral surface, a cylindrical portionprovided on an inner peripheral edge of a ring-like second stepped portionprovided on the building portion, and a screw holealong a center axis of the base.

Wax model base for abutment of dental implant

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Tokyo, Japan

Takamitsu Takagi