Patent number: 11453931
Abstract: The present invention relates to a medical Au—Pt—Pd alloy including Au, Pt, Pd, and inevitable impurities. The alloy has an alloy composition inside a polygon (A1-A2-A3-A4-A5-A6) surrounded by straight lines connected at point A1 (Au: 37.9 atom %, Pt: 0.1 atom %, and Pd: 62 atom %), point A2 (Au: 79.9 atom %, Pt: 0.1 atom %, and Pd: 20 atom %), point A3 (Au: 79.9 atom %, Pt: 20 atom %, and Pd: 0.1 atom %), point A4 (Au: 69.9 atom %, Pt: 30 atom %, and Pd: 0.1 atom %), point A5 (Au: 49 atom %, Pt: 30 atom %, and Pd: 21 atom %), and point A6 (Au: 39 atom %, Pt: 40 atom %, and Pd: 21 atom %) in a Au—Pt—Pd ternary state diagram. The metal structure of the alloy is optimized, and the metal structure is close to a single-phase structure, and has little precipitation of a Au-rich phase and a Pt-rich phase different in composition from a mother phase.
Type:
Grant
Filed:
September 24, 2020
Date of Patent:
September 27, 2022
Assignees:
TANAKA KIKINZOKU KOGYO K.K., TOKUSHIMA UNIVERSITY
Inventors:
Michimasa Okubo, Kenji Goto, Kunihiro Tanaka, Kojiro Shiraishi, Kunihiro Shima, Yuya Kato, Kenichi Hamada, Eiichi Honda, Emi Takegawa
Patent number: 11434541
Abstract: A cold-rolled and heat-treated steel sheet, having a composition including, by weight percent: 0.10%?C?0.40%, 3.5%?Mn?8.0%, 0.5%?Si?2.5%, 0.003%?Al?3.0%, with Si+Al?0.8%, 0.001%?Mo?0.5%, S?0.010%, P?0.020%, N?0.008%, and optionally one or more elements selected from a group comprising Cr, Ti, Nb, V and B, such that: 0.01%?Cr?2.0%, 0.010%?Ti?0.080%, 0.010%?Nb?0.080%, 0.010%?V?0.30%, 0.0005%?B?0.003%, the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The microstructure includes, in surface fraction, between 10% and 50% of retained austenite, at most 8% of fresh martensite, and tempered martensite. The retained austenite includes Mn-enriched austenite, having a Mn content higher than 1.3*Mn %, Mn % designating the Mn content of the steel sheet, a surface fraction of the Mn-enriched austenite with respect to the whole microstructure is between 2% and 12%, and Mn-poor austenite, having an Mn content between 0.5*Mn % and 1.3*Mn %.
Type:
Grant
Filed:
September 15, 2017
Date of Patent:
September 6, 2022
Assignee:
ARCELORMITTAL
Inventors:
Coralie Magar, Kangying Zhu, Astrid Perlade