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1. (WO2016052445) TWO-PHASE ALLOY, PRODUCT OBTAINED USING SAID TWO-PHASE ALLOY, AND PROCESS FOR PRODUCING SAID PRODUCT

Pub. No.:    WO/2016/052445    International Application No.:    PCT/JP2015/077398
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Tue Sep 29 01:59:59 CEST 2015
IPC: C22C 27/06
C22C 30/00
C22F 1/11
C22F 1/00
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: NOUJIMA Masafumi
能島 雅史
AONO Yasuhisa
青野 泰久
OKIZAKI Naoya
沖崎 直也
MARUNO Yuusaku
丸野 祐策
KIMURA Tomonori
木村 友則
OGATA Makoto
緒方 真
Title: TWO-PHASE ALLOY, PRODUCT OBTAINED USING SAID TWO-PHASE ALLOY, AND PROCESS FOR PRODUCING SAID PRODUCT
Abstract:
The purpose of the present invention is to provide a two-phase alloy which is a metallic material suitable even for use in highly corrosive environments with a temperature range as in oil wells and which has high corrosive resistance equal or superior to that of conventional ones, has satisfactory mechanical properties, and is inexpensive; a product obtained from the alloy; and a process for producing the product. The two-phase alloy according to the invention is a two-phase alloy which includes Cr as a main component and in which two phases, i.e., an austenitic phase and a ferritic phase, are coexistent, and is characterized by having a chemical composition which comprises 34-70 mass% Cr, 17-45 mass% Ni, 10-35 mass% Fe, 0.1-2 mass% Mn, 0.1-1 mass% Si, and impurities as the remainder, the total content of the Ni and the Fe being 30-65 mass%.