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Heat treatment of low-alloyed steel up to grade Q125

Iyengar, S. LU ; Bogomolov, A. V. and Zhakupov, A. (2017) International Conference on Industrial Engineering, ICIE 2017 In Materials Engineering and Technologies for Production and Processing III - ICIE-2017 265 SSP. p.981-987
Abstract

This work investigates the problem of how to reduce the prime cost of Grade Q125 Group 4 casing and tubing according to API 5CT and proposes process solutions to resolve it, consisting in the enhancement of series of mechanical properties without chemical alloying of steel with expensive elements such as chromium, molybdenum, vanadium, niobium and boron. During the investigation the process parameters of 9MnSi5 low-alloy steel heat treatment were developed, which confirmed the efficiency of this technology providing high values of strength and yield strengths which are minimum 931 MPa and 862 MPa respectively; at the same time maintaining the required cold resistance and resistance to hydrogen cracking of pipe. The suggested process... (More)

This work investigates the problem of how to reduce the prime cost of Grade Q125 Group 4 casing and tubing according to API 5CT and proposes process solutions to resolve it, consisting in the enhancement of series of mechanical properties without chemical alloying of steel with expensive elements such as chromium, molybdenum, vanadium, niobium and boron. During the investigation the process parameters of 9MnSi5 low-alloy steel heat treatment were developed, which confirmed the efficiency of this technology providing high values of strength and yield strengths which are minimum 931 MPa and 862 MPa respectively; at the same time maintaining the required cold resistance and resistance to hydrogen cracking of pipe. The suggested process parameters were based on heat cycle quenching with heating in induction furnace up to 1050–1100°С, 880–900°С and 740–780°С accordingly at each cycle and cooling rate in each case equal to 50°С/sec, during which the uniform martensite grain size ranging from 5 to 10 micron was obtained.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Alloying, Corrosion resistance and martensite, Heat treatment, High-resistance steel, Seamless pipe, Strengthening
in
Materials Engineering and Technologies for Production and Processing III - ICIE-2017
volume
265 SSP
pages
7 pages
publisher
Trans Tech Publications Ltd
conference name
International Conference on Industrial Engineering, ICIE 2017
external identifiers
  • scopus:85031128148
ISSN
16629779
ISBN
9783035711523
DOI
10.4028/www.scientific.net/SSP.265.981
language
English
LU publication?
yes
id
2deeaee2-5ac7-4aab-82b1-678848a0445e
date added to LUP
2017-10-30 09:00:25
date last changed
2018-01-07 12:24:08
@inproceedings{2deeaee2-5ac7-4aab-82b1-678848a0445e,
  abstract     = {<p>This work investigates the problem of how to reduce the prime cost of Grade Q125 Group 4 casing and tubing according to API 5CT and proposes process solutions to resolve it, consisting in the enhancement of series of mechanical properties without chemical alloying of steel with expensive elements such as chromium, molybdenum, vanadium, niobium and boron. During the investigation the process parameters of 9MnSi5 low-alloy steel heat treatment were developed, which confirmed the efficiency of this technology providing high values of strength and yield strengths which are minimum 931 MPa and 862 MPa respectively; at the same time maintaining the required cold resistance and resistance to hydrogen cracking of pipe. The suggested process parameters were based on heat cycle quenching with heating in induction furnace up to 1050–1100°С, 880–900°С and 740–780°С accordingly at each cycle and cooling rate in each case equal to 50°С/sec, during which the uniform martensite grain size ranging from 5 to 10 micron was obtained.</p>},
  author       = {Iyengar, S. and Bogomolov, A. V. and Zhakupov, A.},
  booktitle    = {Materials Engineering and Technologies for Production and Processing III - ICIE-2017},
  isbn         = {9783035711523},
  issn         = {16629779},
  keyword      = {Alloying,Corrosion resistance and martensite,Heat treatment,High-resistance steel,Seamless pipe,Strengthening},
  language     = {eng},
  pages        = {981--987},
  publisher    = {Trans Tech Publications Ltd},
  title        = {Heat treatment of low-alloyed steel up to grade Q125},
  url          = {http://dx.doi.org/10.4028/www.scientific.net/SSP.265.981},
  volume       = {265 SSP},
  year         = {2017},
}