The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2018
Filed:
Mar. 23, 2015
Tanaka Kikinzoku Kogyo K.k., Chiyoda-ku, Tokyo, JP;
Akira Yoshikawa, Sendai, JP;
Yuui Yokota, Sendai, JP;
Muneki Nakamura, Hiratsuka, JP;
Kunihiro Tanaka, Hiratsuka, JP;
Tatsuya Nakazawa, Hiratsuka, JP;
Koichi Sakairi, Hiratsuka, JP;
TANAKA KIKINZOKU KOGYO K.K., Tokyo, JP;
Abstract
The present invention provides a metal wire rod composed of iridium or an iridium alloy, wherein the number of crystal grains on any cross-section in a longitudinal direction is 2 to 20 per 0.25 mm, and the Vickers hardness at any part is 200 Hv or more and less than 400 Hv. The iridium wire rod is a material which is produced by a μ-PD method, and has low residual stress and which has a small change in the number of crystal grains and hardness even when heated to a temperature equal to or higher than a recrystallization temperature (1200° C. to 1500° C.). The metal wire rod of the present invention is excellent in oxidative consumption resistance under a high-temperature atmosphere, and mechanical properties.