Alloy Design of MARBN for Boiler and Turbine Applications at 650 oC
Abstract
Soluble boron stabilises fine distributions of M23C6 carbides near grain boundaries (GBs) in 9Cr steel during creep, enhancing GB precipitation hardening, and suppresses the Type IV fracture in welded joints at 650oC. Excess addition of boron and nitrogen produces BN inclusions at high temperature, degrading creep strength and rupture ductility. A 9Cr-3W-3Co-0.2V-0.05Nb steel with 130 ppm boron and 80 ppm nitrogen, designated martensitic 9Cr...
Paper Details
Title
Alloy Design of MARBN for Boiler and Turbine Applications at 650 oC
Published Date
Aug 21, 2021
Volume
38
Issue
5
Pages
306 - 321
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