Zhang Z.,Metrode Products Ltd |
Holloway G.,Metrode Products Ltd |
Marshall A.,Metrode Products Ltd
International Journal of Microstructure and Materials Properties | Year: 2011
The introduction of new power generation technologies, such as ultra super critical (USC) plant, has resulted in the development and application of a series of advanced Cr-Mo creep resistant steels. Among these new alloys, T/P92 steel has creep strength 25%-30% higher than the currently widely used T/P91 steel and it has become one of the major alloys for the construction of USC plant. In order to obtain a good understanding of the microstructural characteristics and properties of the T/P92 weld metals, investigation was conducted to welds from SMAW, SAW and FCAW processes using matching filler metals. The important phase transformation temperatures, Ac1, Ms and Mf, were measured. The mechanical properties at ambient temperature and creep properties of the weld metals were evaluated. Procedural factors that influence the performance of T/P92 weld metals were discussed and recommendations for suitable practical welding and post-weld heat treatment procedures were presented. Copyright © 2011 Inderscience Enterprises Ltd.
Valiente Bermejo M.A.,University College West |
Zhang Z.,Metrode Products Ltd
International Journal of Cast Metals Research | Year: 2015
The arc furnace melting technique is widely used for positive material identification in the industry of welding consumable manufacturing. It is also a convenient method for sample preparations of various pre-design chemical compositions for investigations on solidification, phase transformation and microstructure of different alloys. However, up to now, welding research works using the arc furnace melting technique did not report to follow any international standard. This is the first time that an international standard involving arc furnace casting is discussed and evaluated to be applied in the welding research field. In this paper, the specimens obtained with the ASTM E1306-94 standard are assessed, and some suggestions are proposed for modification and improvement of the standard, like adding some intermediate steps including the turning over of the specimen and an extra melting. By adopting those proposals in the procedure, cast samples with complete melting and chemical composition homogeneity were achieved. © 2015 W. S. Maney & Son Ltd.
Kotecki D.J.,Metrode Products Ltd. |
Zhang Z.,Metrode Products Ltd.
Welding Journal | Year: 2013
A major source of variation in ferrite prediction is the variability in chemical analysis. This factor is much more important than the variability in measuring the Ferrite Number or the accuracy of constitution diagrams, mathematical equations, or neural network approaches to prediction of Ferrite Number or ferrite percent. This has been amply demonstrated by a not-well-known round robin of chemical analysis in stainless steel weld metals conducted within the International Institute of Welding Commission II nearly ten years ago. The results of this round robin are examined along with the various predicting approaches.
Agency: GTR | Branch: Innovate UK | Program: | Phase: Collaborative Research & Development | Award Amount: 425.44K | Year: 2011
Full title Verified approaches to life management & improved design of high temperature steels for advanced steam plants - VALID Summary of the VALID project The project explores the link between welding process and cross-weld creep strength for CSEF steel P92 and also the relationship between specimen geometry and weld width. Five different welding processes are being used to fabricate joints in P92 to allow acquisition of data over a wide range of process parameters and demonstrate the available welding technologies to industry. This will include the development of welding equipment and consumables. A demonstration of the creep performance of welds in new experimental steels will also be carried out. Consortium The consortium consists of seven official partners (see below, plus TSB Grant details) and six associates that have a strong involvement in the project Official Project partners: TWI Ltd – Grant £157,560 Air Liquide UK Ltd – Grant £147,390 Scottish & Southern Energy plc – Grant £12,750 Centrica Energy plc– Grant £12,000 Metrode Products Ltd – Grant £43,465 E.ON New Build & Technology Ltd - £26,117 Doosan Power Systems Ltd – Grant £26,268 Total Grant = £425,550 Associates: Polysoude SAS (Sub-Contractor) TenarisDalmine (Material Supplier) The Open University The University of Nottingham TU Chemnitz Industry Sector Power (primary) Secondary - ECM, Oil and gas, construction and engineering.