Abstract: 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 (6) is immersed in an oxalate treatment solution (4) 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 (4) during the chemical treatment and/or the oxalate treatment solution (4) after the chemical treatment.

Abstract: 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): where, each symbol in Formula (1) is as follows: V R - 0.294 ? 1.27 × 10 3 ? ? n = 1 N ( 1 - Rd n - 1 100 ) - 1 · exp ? ( - 2.89 × 10 4 T n + 273 ) · t n ( 1 ) VR: Solidification cooling rate (° C./min) of the liquid alloy, Tn: Holding temperature (° C.

Abstract: A robot arm and the like are provided which can be appropriately driven even by using a DC power supply having a lower output voltage than a general commercial power supply. The robot arm is provided with a housing and includes: an AC motor having a predetermined drive voltage; and a board having a drive circuit mounted thereon, the drive circuit driving the AC motor by converting a DC voltage into an AC voltage, the DC voltage being output from a power supply providing a predetermined DC voltage output. The board is arranged in surface contact with a predetermined surface of the housing.

Abstract: 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): where, each symbol in Formula (1) is as follows: V R - 0.294 ? 1.27 × 10 3 ? ? ? n = 1 N ? ? ( 1 - Rd n - 1 100 ) - 1 · exp ? ( - 2.89 × 10 4 T n + 273 ) · t n ( 1 ) VR: Solidification cooling rate (° C./min) of the liquid alloy, Tn: Holding temperature (° C.

Abstract: 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 (6) is immersed in an oxalate treatment solution (4) 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 (4) during the chemical treatment and/or the oxalate treatment solution (4) after the chemical treatment.

Abstract: There is provided an austenitic stainless steel material having a consistent high-strength across the overall length of the steel material, which has a chemical composition consisting of, in mass percent: C: 0.10% or less, Si: 1.0% or less, Mn: 3 to 8%, P: 0.05% or less, S: 0.03% or less, Ni: 10 to 20%, Cr: 15 to 30%, N: 0.20 to 0.70%, with the balance being Fe and impurities, the austenitic stainless steel material having a grain size number of 6.0 or greater, the grain size number conforming to ASTM E 112 tensile strength of the austenitic stainless steel material is 800 MPa or more, and the difference between the maximum value and the minimum value of the tensile strength is 50 MPa or smaller. The number of alloy carbo-nitrides having a circle equivalent diameter of larger than 1000 nm in the steel is 10/mm2 or more.

Abstract: An objective of the present invention is to provide a Ni—Fe—Cr alloy having an excellent intergranular corrosion resistance. A Ni—Fe—Cr alloy of the present embodiment has a chemical composition consisting of, in mass percent, C: 0.005 to 0.015%, Si: 0.05 to 0.50%, Mn: 0.05 to 1.5%, P: 0.030% or less, S: 0.020% or less, Cu: 1.0 to 5.0%, Ni: 30.0 to 45.0%, Cr: 18.0 to 30.0%, Mo: 2.0 to 4.5%, Ti: 0.5 to 2.0%, N: 0.001 to 0.015%, and Al: 0 to 0.50%, with the balance being Fe and impurities. An average grain size d (?m) satisfies Formula (1): d<4.386/(Crel+0.15)??(1) where, Crel in Formula (1) is defined by Formula (2): Crel=C?0.125Ti+0.8571N??(2) where, symbols of elements in Formula (1) and Formula (2) are to be substituted by contents of corresponding elements (mass %).

Abstract: A Ti—Ni—Nb alloy device is provided which is a shape memory device excellent in response characteristics. The Ti—Ni—Nb alloy device is made of a Ti—Ni—Nb alloy which finishes transformation at a temperature lower than 10° C. after start of reverse transformation.

Abstract: To provide a stent which holds various performances such as deliverability, prevention of restenosis, flexible shape conformability, and so on and is therefore adaptable not only to a bile duct but also to a blood vessel system such as a tortuous coronary artery substantially without causing restenosis. A stent with an autonomic function is made of a Ti—Ni based shape memory alloy and has a maximum expanding force at a center portion in its lengthwise direction.

Abstract: 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 portion 1 engaging with an implant fixture analog embedded in a gypsum model without rotation, a truncated conical portion 2, a building portion 4 provided directly on an inner peripheral edge of a ring-like first stepped portion 3, which is provided on an oral cavity inner side of the truncated conical portion 2, or through a cylindrical portion 4a having a low height to have a conical shape expanding toward the oral cavity inner side and have a cutoff portion 5 on an outer peripheral surface, a cylindrical portion 7 provided on an inner peripheral edge of a ring-like second stepped portion 6 provided on the building portion 4, and a screw hole 8 along a center axis of the base.

Abstract: A dental implant is made of a mono metal body from inside to outermost surface of the implant, and the implant surface has macro pores having an inner diameter with the level of several tens of ?m, micro pores having an inner diameter of 1 to 2 ?m, and nano discharge craters having an inner diameter with the level of several tens of nm. A surface treatment method of the implant includes steps of producing macro pores having an inner diameter with the level of several tens of ?m by blast processing, producing micro pores having an inner diameter of 1 to 2 ?m by acid treatment, and producing nano discharge craters having an inner diameter with the level of several tens of nm by anodic oxidation treatment.

Abstract: 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 portion 1 engaging with an implant fixture analog embedded in a gypsum model without rotation, a truncated conical portion 2, a building portion 4 provided directly on an inner peripheral edge of a ring-like first stepped portion 3, which is provided on an oral cavity inner side of the truncated conical portion 2, or through a cylindrical portion 4a having a low height to have a conical shape expanding toward the oral cavity inner side and have a cutoff portion 5 on an outer peripheral surface, a cylindrical portion 7 provided on an inner peripheral edge of a ring-like second stepped portion 6 provided on the building portion 4, and a screw hole 8 along a center axis of the base.

Abstract: To prevent bacterial infection, a dental implant fixture includes a female screw portion formed from the oral cavity inner side, an embedding male screw portion 1a formed to have an equal outer diameter D on a tapering truncated conical main body, a collar portion 1c at the oral cavity inner side of the embedding male screw portion 1a, and a sealing male screw portion 1b which has one or more threads, extends from the collar portion 1c in a length of ? to ? of a length L of the embedding male screw portion 1a, and has an outer diameter starting from that equal to the outer Diameter D and being on a truncated conical face less tapering than the truncated conical main body, where the threads gradually decrease in height and disappear at the side opposite to the oral cavity inner side.

Abstract: To provide a Ti—Ni—Nb alloy device which is a shape memory device excellent in response characteristics. The Ti—Ni—Nb alloy device is made of a Ti—Ni—Nb alloy which finishes transformation at a temperature lower than 10° C. after start of reverse transformation.

Abstract: To provide a stent which holds various performances such as deliverability, prevention of restenosis, flexible shape conformability, and so on and is therefore adaptable not only to a bile duct but also to a blood vessel system such as a tortuous coronary artery substantially without causing restenosis. A stent with an autonomic function is made of a Ti—Ni based shape memory alloy and has a maximum expanding force at a center portion in its lengthwise direction.