NDLI: Effect of Niobium on the Ferrite Continuous-Cooling-Transformation (CCT) Curve of Ultrahigh-Thickness Cr-Mo Steel

Content Provider	Springer Nature Link
Author	Lee, Sanghoon Na, Hyesung Kim, Byunghoon Kim, Dongjin Kang, Chungyun
Copyright Year	2013
Abstract	Pressure vessels made for petrochemical and power plants using Cr-Mo steel must be thick (≥400 mm) and have high tensile strength (≥600 MPa). However, the tensile strength in the middle portion of the vessel is very low as a result of ferrite formation. Therefore, research was performed to study the ferrite transformation that occurs in the middle portion of high-thickness Cr-Mo steel when Nb is added to it. The ferrite-formation start time of the continuous-cooling-transformation (CCT) curve decreased with an increase in Nb content until the latter reached 0.05 pct. On cooling from the austenitizing temperature, some of the NbC present at the austenitizing temperature of 1203 K (930 °C) goes into austenite solution in the temperature range of 1173 K to 1073 K (900 °C to 800 °C). However, the ferrite curve shifted to the left for the alloy containing 0.075 pct Nb. It is postulated that the surplus NbC could act as ferrite nucleation sites despite the lower cooling rate. As a result, the hardenability improved in the order of the following Nb content: 0.05 pct, 0.025 pct, 0 pct, and 0.075 pct.
Starting Page	2523
Ending Page	2532
Page Count	10
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	44
Issue Number	6
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2013-02-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Effects of Ultra-Fast Cooling Technology on Microstructure and Properties of Low Carbon Steel

Characteristics of Austenite Transformation During Post Forge Cooling of Large-Size High Strength Steel Ingots

Cooling Curve Analysis as an Alternative to Dilatometry in Continuous Cooling Transformations

Effects of Mo on Carbon Enrichment During Proeutectoid Ferrite Transformation in Hypoeutectoid Fe-C-Mn Alloys

Effects of Cooling on Bending Process of Heavy Rail Steel After Hot Rolling

Determination of Mo-Rich Laves-Phase in Weld Metals of a Creep-Resistant 9% Cr-Steel Using Light Optical Microscopy

Ultrahigh Ductility, High-Carbon Martensitic Steel

Precipitates in Biomedical Co-Cr-Mo-C-N-Si-Mn Alloys

Effect of Coiling Conditions on Microstructure and Mechanical Property Characteristic of a C–Mn–Si–Cr Steel

Effect of Niobium on the Ferrite Continuous-Cooling-Transformation (CCT) Curve of Ultrahigh-Thickness Cr-Mo Steel

Similar Documents

Effects of Ultra-Fast Cooling Technology on Microstructure and Properties of Low Carbon Steel

Characteristics of Austenite Transformation During Post Forge Cooling of Large-Size High Strength Steel Ingots

Cooling Curve Analysis as an Alternative to Dilatometry in Continuous Cooling Transformations

Effects of Mo on Carbon Enrichment During Proeutectoid Ferrite Transformation in Hypoeutectoid Fe-C-Mn Alloys

Effects of Cooling on Bending Process of Heavy Rail Steel After Hot Rolling

Determination of Mo-Rich Laves-Phase in Weld Metals of a Creep-Resistant 9% Cr-Steel Using Light Optical Microscopy

Ultrahigh Ductility, High-Carbon Martensitic Steel

Precipitates in Biomedical Co-Cr-Mo-C-N-Si-Mn Alloys

Effect of Coiling Conditions on Microstructure and Mechanical Property Characteristic of a C–Mn–Si–Cr Steel

Effect of Niobium on the Ferrite Continuous-Cooling-Transformation (CCT) Curve of Ultrahigh-Thickness Cr-Mo Steel