Development of a Low Application Temperature FBE Coating

2008 ◽  
Author(s):  
Jennifer K. Pratt ◽  
Meghan L. Mallozzi
Keyword(s):  
Single Layer ◽  
High Strength Steels ◽  
High Strength ◽  
New Product ◽  
High Heat ◽  
Optimal Performance ◽  
Pipeline Construction ◽  
And Performance ◽  
New Generation ◽  
Over 40 Years

Fusion bonded epoxy (FBE) coatings have been used on pipelines as protection against corrosion for over 40 years. They have been used as a stand-alone product in single layer systems and as a primer in dual and three layer systems. To achieve optimal performance, current FBE products require application temperatures in excess of 230°C for single layer systems and 200°C for three layer systems. The introduction of high strength steels such as X80, X100 and X120 for use in pipeline construction has presented a challenge to the industry in terms of the availability of suitable coating systems. High strength steels (particularly grades X100 and greater) cannot withstand pre-heat temperatures in excess of 200°C. Exposure to the high heat required when coating with a typical FBE product results in the degradation of some of the key properties of these high strength steels. This paper will discuss the development and performance of a new generation FBE coating that can be applied at temperatures as low as 180°C for single layer systems and as low as 150°C for multi-layer systems. Performance of this new product will be compared to one of the best performing commercially available FBE products applied at 240°C.

Grain Coarsening Characteristics of Modern Nb Microalloyed Steels

2013 ◽  
Vol 753 ◽  
pp. 325-328 ◽  
Author(s):  
Zhi Xiong Zhu ◽  
Lenka Kuzmikova ◽  
Hui Jun Li ◽  
Liang Chen ◽  
Bob de Jong ◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Economic Benefits ◽  
Microalloyed Steels ◽  
Environmental Benefit ◽  
Grain Coarsening ◽  
Bearing Steels ◽  
Coarsening Behavior ◽  
New Generation ◽  
Modern Steelmaking

Modern steelmaking technologies utilizing microalloyed steel designs have been responsible for enormous economic benefits for both the steelmaker and fabricator. What has not been acknowledged is the environmental benefit that high strength steels have produced in terms of reduced steel usage in major infrastructure projects. The judicial use of microalloying has the potential to further reduce total tonnage requirements while delivering enhanced operational performance and service life. Various projects around the world have begun to recognize these recent microalloying developments. This paper will present the grain coarsening behavior of the new generation of Nb bearing steels, which have been used in major international steel fabrication projects.

New Generation TMCP Technology and its Application to 960 MPa High Strength Structural Steel Plates

2014 ◽  
Vol 922 ◽  
pp. 94-101
Author(s):  
Zhao Dong Wang ◽  
Jin Bao Zhu ◽  
Xiang Tao Deng ◽  
Bing Xing Wang ◽  
Yong Tian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Structural Steel ◽  
New Technology ◽  
High Strength Steels ◽  
High Strength ◽  
Steel Plates ◽  
Ultra Fast Cooling ◽  
Low Temperature Impact Toughness ◽  
New Generation

The new generation thermo-mechanical controlled processing (TMCP) technology based on advanced cooling technique and equipment is introduced here in the context of 960MPa grade high strength structural steel plates. This new technology accurately controls the cooling rate and temperature, with strong influence on phase transformation and precipitation including microstructure and mechanical properties of the steel. The application of the newly developed technology applied to the production of 960MPa grade high strength structural steel demonstrated its effectiveness, especially in improving low temperature impact toughness. The yield strength was 980~1000 MPa and tensile strength 1080~1200 MPa, with impact toughness approaching 150J at-40°C.Keywords: New generation TMCP technology; Ultra fast cooling process; high strength steels; mechanical properties

scholarly journals Low-Carbon Ti-Mo Microalloyed Hot Rolled Steels: Special Features of the Formation of the Structural State and Mechanical Properties

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1584
Author(s):  
Alexander Zaitsev ◽  
Nataliya Arutyunyan
Keyword(s):  
Mechanical Properties ◽  
High Strength Steels ◽  
High Strength ◽  
Ferrite Matrix ◽  
Microalloyed Steels ◽  
Low Carbon ◽  
Bulk System ◽  
Hot Rolled ◽  
New Generation ◽  
Technological Strength

Low-carbon Ti-Mo microalloyed steels represent a new generation of high strength steels for automobile sheet. Excellent indicators of difficult-to-combine technological, strength, and other service properties are achieved due to the superposition of a dispersed ferrite matrix and a bulk system of nanoscale carbide precipitates. Recently, developments are underway to optimize thermo-deformation processing for the most efficient use of phase precipitates. The review summarizes and analyzes the results of studies of mechanical properties depending on the chemical composition and parameters of hot deformation of low-carbon Ti-Mo microalloyed steels. Particular attention is paid to the features of the formation and the influence of various types of phase precipitates and the dispersion of the microstructure on mechanical properties. The advantages of Ti-Mo microalloying system and the tasks requiring further solution are shown.

scholarly journals Effect of microstructure factors on abrasion resistance of high-strength steels

2014 ◽  
Vol 60 (No. 3) ◽  
pp. 115-120 ◽  
Author(s):  
E. ZDRAVECKÁ ◽  
J. TKÁČOVÁ ◽  
M. ONDÁČ
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Abrasion Resistance ◽  
High Strength Steels ◽  
Wear Test ◽  
High Hardness ◽  
High Strength ◽  
Abrasive Wear Resistance ◽  
And Performance ◽  
Three Body

Current development of high strength abrasion resistant steels is mostly oriented on high hardness, martensitic concept following the hypothesis that the abrasion resistance holds a proportional tendency with hardness. The various experimental observations have suggested that the high hardness of martenzite does not guarantee a high abrasion resistance because the brittle nature of martensite can lead to decrease their abrasive wear. The aim of this work was to analyse the influence of microstructure on abrasion resistance of selected high-strength low-alloyed steels used in the industry. The abrasive wear resistance of selected steels was obtained using an ASTM-G65 three-body abrasive wear test, microstructure and wear resistance determination. It was observed that grain refinement is an effective way of enhancing the abrasion resistance. In this context, micro alloyed steels offer an attractive combination of price and performance.

Welding of Ultra High Strength Steels

2013 ◽  
Vol 849 ◽  
pp. 357-365 ◽  
Author(s):  
Paul Kah ◽  
Markku Pirinen ◽  
Raimo Suoranta ◽  
Jukka Martikainen
Keyword(s):  
Electron Beam Welding ◽  
Research Work ◽  
High Strength Steels ◽  
High Strength ◽  
Welding Parameters ◽  
Heavy Equipment ◽  
High Strength Level ◽  
Ultra High Strength Steels ◽  
New Generation ◽  
Welding Processes

The ongoing need to reduce the weight of products while increasing strength has resulted in new generation steel manufacturing using special heat treatments to produce High Strength Steels (HSS) and Ultra High Strength Steels (UHSS) with up to 1700 MPa tensile strength. The high strength level of these steels makes it possible to produce structures with a considerable weight and cost reduction, and such steels have been adopted in the automotive industry and for mobile heavy equipment. Welding of UHSS is, however, not without its complications and welding processes for these steels need careful attention. For instance, their high susceptibility to cracking and Heat Affected Zone (HAZ) softening are risks that need to be borne in mind when choosing welding parameters. This research work discusses the difficulties and challenges of successful welding of UHSS. Common welding methods used in welding of UHSS are briefly reviewed to gain a better understanding of the effects of different welding parameters and methods. The paper finds that UHSS can be satisfactorily welded with laser welding, electron beam welding, resistance welding, and conventional arc welding methods, but the quality of the weld is dependent on appropriate control of several parameters and variables of the welding processes.

scholarly journals Modern high strength steels under high strain-rate regimes

2021 ◽  
Vol 250 ◽  
pp. 05013
Author(s):  
Ezio Cadoni ◽  
Matteo Dotta ◽  
Daniele Forni
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Single Layer ◽  
High Strength Steels ◽  
High Strength ◽  
Critical Infrastructures ◽  
Mechanical Resistance ◽  
Large Specimen ◽  
High Rise

In order to properly design critical infrastructures and buildings in steel (bridges, high-rise building, off-shore, cranes, etc.), certain requirements concerning to mechanical resistance and robustness under exceptional actions have to be carefully fulfilled. An acceptable level of safety must be assured to avoid human loss, environmental pollution and material damage. These structures can be subjected to severe accidental loading such as blast or impact. In this context it is fundamental to adequately know the behaviour of structural steel under high strain rate. Modern high strength steels are quenched and selftempered steels. These steels have several layers with differentiated microstructures (martensitic in the cortical part and ferritic in the core). The behaviour of the single layer at high strain rate regimes have to be accurately studied. The paper collects and discusses the tensile results at high strain rate obtained on samples of homogeneous layers of S690QL and S960QL steels. Finally, the characterisation of the single layers has been used in order to analyse the results obtained in large specimen obtained from slabs 12mm thick.

scholarly journals Formability Characterization of a New Generation High Strength Steels

2003 ◽  
Author(s):  
Sriram Sadagopan ◽  
Dennis Urban ◽  
Chris Wong ◽  
Mai Huang ◽  
Benda Yan
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
New Generation
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