TY - JOUR
T1 - Improving the Surface Properties of an API 5L Grade B Pipeline Steel by Applying the Boriding Process—Part II
T2 - On the Changes in the Mechanical Properties
AU - Alcantar-Martínez, Laura Montserrat
AU - Ruiz-Trabolsi, Pablo Alfredo
AU - Tadeo-Rosas, Raúl
AU - Miranda-Hernández, José Guadalupe
AU - Cabrera-Sierra, Román
AU - Velázquez, Julio César
AU - Hernández-Sánchez, Enrique
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/2
Y1 - 2023/2
N2 - The mechanical performance of API 5L grade B steel, after undergoing a thermochemical boriding process, was assessed. We quantified the boride layer microhardness over cross-section specimens, with the aim of characterizing the mechanical resistance under different conditions. The pipeline steel was analyzed because of the changes in yield strength, ultimate tensile strength, and ductility after treatment with boron. These oil and gas pipelines must work in aggressive environments, so borided pipeline steel specimens were tested to assess their erosion–corrosion resistance. Another important characteristic to evaluate was the wearing resistance, because the pipelines tend to suffer scratches when they are under construction. We also present a discussion of the results of the total research work (Part I and Part II), including the results of the boride layer characterization as well as the changes in the substrate, with the goal of selecting the best conditions under which to treat pipeline steel. More extreme treatment conditions can help to form more stable and resistant boride layers, but they can considerably modify some mechanical characteristics of the API 5L grade B steel. For this reason, the boriding treatment conditions must be chosen in a synergistic way.
AB - The mechanical performance of API 5L grade B steel, after undergoing a thermochemical boriding process, was assessed. We quantified the boride layer microhardness over cross-section specimens, with the aim of characterizing the mechanical resistance under different conditions. The pipeline steel was analyzed because of the changes in yield strength, ultimate tensile strength, and ductility after treatment with boron. These oil and gas pipelines must work in aggressive environments, so borided pipeline steel specimens were tested to assess their erosion–corrosion resistance. Another important characteristic to evaluate was the wearing resistance, because the pipelines tend to suffer scratches when they are under construction. We also present a discussion of the results of the total research work (Part I and Part II), including the results of the boride layer characterization as well as the changes in the substrate, with the goal of selecting the best conditions under which to treat pipeline steel. More extreme treatment conditions can help to form more stable and resistant boride layers, but they can considerably modify some mechanical characteristics of the API 5L grade B steel. For this reason, the boriding treatment conditions must be chosen in a synergistic way.
KW - boride layers
KW - ductility
KW - erosion–corrosion
KW - hardness
KW - pipeline steel
KW - wear resistance
UR - http://www.scopus.com/inward/record.url?scp=85149072805&partnerID=8YFLogxK
U2 - 10.3390/coatings13020470
DO - 10.3390/coatings13020470
M3 - Artículo
AN - SCOPUS:85149072805
SN - 2079-6412
VL - 13
JO - Coatings
JF - Coatings
IS - 2
M1 - 470
ER -