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1. (WO2017169056) Cr-BASED TWO-PHASE ALLOY AND PRODUCT THEREOF

Pub. No.:    WO/2017/169056    International Application No.:    PCT/JP2017/003081
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Tue Jan 31 00:59:59 CET 2017
IPC: C22C 27/06
B22D 21/02
B22F 1/00
C22C 30/02
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: KIMURA Tomonori
木村 友則
NOUJIMA Masafumi
能島 雅史
AONO Yasuhisa
青野 泰久
OGATA Makoto
緒方 真
TOKOO Naoya
床尾 尚也
Title: Cr-BASED TWO-PHASE ALLOY AND PRODUCT THEREOF
Abstract:
The purpose of the present invention is to provide a two-phase alloy having Cr, which is inexpensive, as the main component thereof and having excellent corrosion resistance, strength characteristics including toughness, and abrasion resistance that exceed those of conventional alloys, even in highly corrosive environments such as oil wells, etc. This Cr-based two-phase alloy has two phases, i.e. a ferrite phase and an austenite phase, mixed therein and is characterized by: the chemical composition of the Cr-based two-phase alloy comprising a main component, an auxiliary component, impurities, a first optional auxiliary component, and a second optional auxiliary component; and the main component comprising 33%-65% by mass Cr, 18%-40% by mass Ni; and 10%-33% by mass Fe.