Hard Chrome Replacement and Other Thermal Spray Applications in the Chilean Navy

2000 ◽  
Author(s):  
J. Streeter ◽  
E.R. Sampson
Keyword(s):  
Thermal Spray ◽  
Thermal Spray Technology ◽  
Thermal Spraying ◽  
Operating Conditions ◽  
Cooperative Program ◽  
Maintenance Work ◽  
Hard Chrome ◽  
Training Exercises ◽  
Hard Chrome Replacement ◽  
Spray Applications

Abstract Naval ship components are subject to extreme operating conditions while at sea, either during regular sailing periods and/or during training exercises. The Chilean Navy has employed thermal spray technology since the early 1960 decade. By setting up a joint cooperative program between the Chilean Navy industry and suppliers, it has been possible to start regaining confidence in thermal spraying and positioning the same as a "must" technology in regular naval maintenance work. This article presents a description of the Naval Components Reclamation Program and discusses the processes involved in hard chrome plating replacement in naval components. It provides a review of characteristic thermal spray applications developed by the Joint Naval Components Reclamation Program.

General Problems of Tribology of Thermal Sprayed Composite Coatings

2005 ◽  
Author(s):  
Y. A. Kharlamov ◽  
Fazli Rahman ◽  
J. A. Chattha ◽  
A. V. Shevchenko ◽  
M. Y. Kharlamov
Keyword(s):  
Surface Layer ◽  
Thermal Spray ◽  
Thermal Spray Technology ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Tribological Application ◽  
Composition And Structure ◽  
Or Methodology ◽  
Surface Layer Composition ◽  
Layer Composition

Many different methods of thermal spraying are used for deposition of coatings. The use of thermal spray technology in tribological applications is growing and will continue to grow. There is a need for a strategy or methodology for selecting a surface layer composition and structure and methods of their obtaining for a given tribological application. In this paper such a strategy is proposed and its elements are discussed.

Tribological evaluation of HVOF thermal-spray coatings as a hard chrome replacement

2010 ◽  
Vol 43 (10) ◽  
pp. 1346-1353 ◽  
Author(s):  
Josep A. Picas ◽  
Miquel Punset ◽  
M. Teresa Baile ◽  
Enric Martín ◽  
Antonio Forn
Keyword(s):  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
Hvof Thermal Spray ◽  
Hard Chrome ◽  
Hard Chrome Replacement

scholarly journals Characterization of 410NiMo Coatings Deposited By Thermal Spray And Re- Cast With TIG On CA6NM Martensitic Stainless Steel Against Cavitation Erosion

2021 ◽  
Author(s):  
Émillyn Ferreira Trevisani Olivio ◽  
Paulo Sergio Olivio Filho ◽  
Janaina Fracaro de Souza ◽  
Paulo Victor Prestes Marcondes ◽  
João Roberto Sartori Moreno
Keyword(s):  
Stainless Steel ◽  
Thermal Spray ◽  
Stainless Steels ◽  
Cavitation Erosion ◽  
Martensitic Stainless Steel ◽  
Steel Substrate ◽  
Thermal Spraying ◽  
Welding Process ◽  
Operating Conditions ◽  
Martensitic Stainless Steels

Abstract In most applications, martensitic stainless steels are subjected to operating conditions in which good mechanical properties and wear resistance are required. CA6NM is a soft martensitic stainless steel that has high shear stress and toughness, good resistance to corrosion and cavitation, and better weldability than conventional martensitic stainless steels. These steels are susceptible to cavitation erosion which is the process of removing material due to the progressive action of erosive wear caused by the implosion of bubbles close to the surface of the mechanical element. Welding and thermal spraying are normally used to produce coatings when there is a need to increase the useful life of systems and parts, or in some cases for refurbishing. In this work 410NiMo martensitic stainless steel, in the form of wire and rod, were deposited by electric arc and flame thermal spraying processes respectively over a CA6NM martensitic stainless steel substrate. In order to improve the layer performance the sprayed coatings were remelted by the TIG welding process. The specimens were evaluated by accelerated cavitation according to ASTM G32-1 0 standard, Vickers microhardness, optical microscopy, X-ray diffraction, SEM and EDS. The tests showed coatings with low porosity and resistant to erosion by cavitation comparable with welded coatings. Making thermal spray with reflow by the TIG process an alternative in the application of this type of coating.

Thermal Spraying of Cylinder Bores With the PTWA Internal Coating System

2007 ◽  
Author(s):  
K. Bobzin ◽  
F. Ernst ◽  
J. Zwick ◽  
T. Schlaefer ◽  
D. Cook ◽  
...  
Keyword(s):  
Cast Iron ◽  
Co2 Emissions ◽  
Thermal Spray ◽  
Thermal Spray Technology ◽  
Thermal Spraying ◽  
Friction Reduction ◽  
New Production ◽  
Automotive Production ◽  
Engine Blocks ◽  
Engine Components

A major goal for the automotive industry over the next years is the reduction in CO2 emissions. This can be accomplished by reducing fuel consumption for new production vehicles and by increased remanufacturing of old worn engines. Both of these objectives can be addressed with the use of PTWA (Plasma Transferred Wire Arc) thermal spray of cylinder bores. Key factors in this development relating to new production engines focus on the reduction in overall vehicle weight and also the improvement of engine efficiency by reducing the internal friction losses. Substantial weight savings can be achieved with the use of aluminum engines. However, most aluminum engines require cast iron liners to be used as the wear surface. Additional weight savings and potential friction reduction can be achieved by replacing these heavy cast iron liners with a low friction, wear resistant PTWA coatings on the cylinder bores. In addition to being applied to new engines for automotive production, this same process can also be used to repair worn cylinder bores in both aluminum and cast iron engine blocks. This technology makes it possible to salvage engine blocks that would otherwise be scrapped. In addition, PTWA thermal spray can be used to reduce costs for engines that are already remanufactured using expensive over-sized pistons. With reduced costs and salvaging previously scrapped components, the use of the thermal spray technology can increase the amount of remanufacturing for critical engine components. The reduced CO2 emissions results from remanufactured components requiring 50% to 80% less energy to produce than the new production manufactured equivalents [1].

Thermal Spray Technology for Carbon Roller and Applications for Paper Mills

2011 ◽  
Vol 65 (11) ◽  
pp. 1142-1146
Author(s):  
Masaya Nagai ◽  
Sadato Shigemura ◽  
Akihiko Yoshiya ◽  
Masanobu Yamanaka
Keyword(s):  
Thermal Spray ◽  
Thermal Spray Technology ◽  
Paper Mills

Comprehensive Methods for Studying Microinhomogeneity in Thermal Spray Coatings with Amorphous-Crystalline Structure

1998 ◽  
Author(s):  
G. Grigorenko ◽  
A. Borisova
Keyword(s):  
Thermal Spray ◽  
Crystalline Structure ◽  
Structural Phase ◽  
Thermal Spraying ◽  
Integrated Approach ◽  
Thermal Spray Coatings ◽  
Chemical Heterogeneity ◽  
New Approach ◽  
X Ray ◽  
Spray Coatings

Abstract An integrated approach was developed for investigation of thermal spray coatings with the amorphous-crystalline structure. The new approach combines methods of metallography, differential thermal and X-ray phase analysis, scanning electron microscopy and X-ray microanalysis. This makes it possible to reveal structural, phase and chemical heterogeneity, determine the degree of amorphization of coatings, temperature and heat of crystallization of the amorphous phase during heating. The new integrated approach was used to study amorphous-crystalline coatings of the Ni-P, Fe-Ni-B and Fe-B systems produced by thermal spraying.

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