Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

Mechanical, Microstructural And Corrosion Characterization Of Low Binder Containing WC-Co Grades Using A Binderjet Process

Picture for Mechanical, Microstructural And Corrosion Characterization Of Low Binder Containing WC-Co Grades Using A Binderjet Process
Available for download

Cemented carbides have been widely used to make parts for wear applications due to the excellent combination of hardness and toughness. Cemented carbides represent a group of composite materials containing hard metal carbides, such as tungsten carbide (WC), bonded by ductile metallic binder agents, such as cobalt (Co), nickel (Ni), or iron (Fe).1 By varying WC grain size, weight fraction of metallic binder, and processing parameters, a wider range of microstructure and mechanical properties can be achieved.

Product Number: 51322-17583-SG
Author: Krutibas Panda, Ed Rusnica, Reece Goldsberry, Jerry Domingue, Paul Prichard, Zhuqing Wang
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
$0.00
$20.00
$20.00

Cemented Tungsten carbides (WC-X) have been a mainstay for wear components across many different industries including oil & gas. These ceramic-metal (cermet) systems can be widely tailored to optimize their wear resistance, corrosion resistance and toughness properties to suit their functional requirements. Conventional powder metallurgy has been the process of choice for these cermets whereby tungsten carbide powder along with a choice of metallic binder (cobalt, nickel, or alloyed binder) are pressed into a desired shape and subsequently sintered. There are manufacturing limitations to traditional powder metallurgy for parts containing high geometric complexity. In addition, secondary processing required to create complex features on press-sintered parts such as electro discharge machining (EDM) can sometime lead to micro cracking in the re-cast layer, which subsequently leads to part failure during operation. Additive manufacturing (AM) can produce cemented carbides with complex part geometry, significant weight reduction, and elimination of subsequent secondary processing to these parts. Although several AM methods have been investigated to additively manufacture cemented carbides, the present study utilized a binderjet process to manufacture two relatively low binder containing WC-Co grades; WC-17%Co and WC-13.5%(Co+Ni+Cr+Mo). The corrosion, wear, and mechanical properties of AM cemented carbides grades were characterized in the present study. Corrosion properties of the AM grades as well as their equivalent grades fabricated using conventional PM route were compared using linear polarization resistance and cyclic potentio-dynamic polarization following methods outlined in ASTM G59 and ASTM G61, respectively, in neutral 3.5% NaCl solutions. Mechanical characterization was performed using fracture toughness testing per ASTM B771 as well as transverse rupture toughness testing per ASTM B406 on these grades. Wear properties were examined according to ASTM G65 and B611. Optical and scanning electron microscopic techniques were further utilized to characterize and compare the microstructures of the samples manufactured using these two processing routes. The effect of microstructure on the resulting mechanical properties of the AM parts is also addressed in this study.

Cemented Tungsten carbides (WC-X) have been a mainstay for wear components across many different industries including oil & gas. These ceramic-metal (cermet) systems can be widely tailored to optimize their wear resistance, corrosion resistance and toughness properties to suit their functional requirements. Conventional powder metallurgy has been the process of choice for these cermets whereby tungsten carbide powder along with a choice of metallic binder (cobalt, nickel, or alloyed binder) are pressed into a desired shape and subsequently sintered. There are manufacturing limitations to traditional powder metallurgy for parts containing high geometric complexity. In addition, secondary processing required to create complex features on press-sintered parts such as electro discharge machining (EDM) can sometime lead to micro cracking in the re-cast layer, which subsequently leads to part failure during operation. Additive manufacturing (AM) can produce cemented carbides with complex part geometry, significant weight reduction, and elimination of subsequent secondary processing to these parts. Although several AM methods have been investigated to additively manufacture cemented carbides, the present study utilized a binderjet process to manufacture two relatively low binder containing WC-Co grades; WC-17%Co and WC-13.5%(Co+Ni+Cr+Mo). The corrosion, wear, and mechanical properties of AM cemented carbides grades were characterized in the present study. Corrosion properties of the AM grades as well as their equivalent grades fabricated using conventional PM route were compared using linear polarization resistance and cyclic potentio-dynamic polarization following methods outlined in ASTM G59 and ASTM G61, respectively, in neutral 3.5% NaCl solutions. Mechanical characterization was performed using fracture toughness testing per ASTM B771 as well as transverse rupture toughness testing per ASTM B406 on these grades. Wear properties were examined according to ASTM G65 and B611. Optical and scanning electron microscopic techniques were further utilized to characterize and compare the microstructures of the samples manufactured using these two processing routes. The effect of microstructure on the resulting mechanical properties of the AM parts is also addressed in this study.

Product tags
Also Purchased
Picture for Long-Term Cost Saving By Using High Alloyed Stainless Steel In Seawater Coolers
Available for download

Long-Term Cost Saving By Using High Alloyed Stainless Steel In Seawater Coolers

Product Number: 51322-17544-SG
Author: Jonas Höwing
Publication Date: 2022
$20.00

Copper alloys such as copper nickel (CuNi) and Admiralty Brass (CuZn) are often successful material selections for seawater coolers. The copper alloys successes in these highly corrosive environments can be attributes to the ability of copper to form a protective scale, thus stopping corrosion of the material. On copper alloys in seawater, the protective scale formed comprises a mix of cuprous oxide (Cu2O), copper oxide (CuO) and copper hydroxy chlorides.
Picture for Local Hard Zones On TMCP Large Diameter Line Pipes: What Do We Know?
Available for download

Local Hard Zones On TMCP Large Diameter Line Pipes: What Do We Know?

Product Number: 51322-17565-SG
Author: Hervé Marchebois, Bruce Cowe, Thierry Cassagne
Publication Date: 2022
$20.00

The current paper deals with a thorough analysis of these newly recognized LHZ with Scanning Electron Microscope (SEM) and Electron Back Scattering Diffraction (EBSD) investigations through the wall thickness of pipes. Internal diameter (ID) surface, intermediate zone and bulk metal microstructures showed an increase of a strong misorientation while approaching the ID. Thus, LHZ is characterized by the presence of lath and especially lower bainite type microstructures associated to high local hardness above the NACE MR 0175 / ISO 15156 limits for sour service applications.
Picture for Metal Dusting Resistance Of Nicrmocu Alloy And Its Weld Overlay Under High Pressure Condition
Available for download

Metal Dusting Resistance Of Nicrmocu Alloy And Its Weld Overlay Under High Pressure Condition

Product Number: 51322-17570-SG
Author: Bingtao Li, Vinay Deodeshmukh, Clara Schlereth, Anke S. Ulrich, Mathias C. Galetz
Publication Date: 2022
$20.00

Many industrial processes contain H2, CO, CO2, and H2O gas mixtures, such as syngas production and processing in hydrogen, ammonia, and methanol plants. These process environments have high carbon activity, i.e. ac > 1, and low oxygen partial pressure at their elevated operating temperatures, such as in the temperature range of 400-800 °C (752-1472 °F). The high carbon activity could result in a catastrophic material degradation, i.e. metal dusting. The resulting corrosion products consist of carbon or graphite and metal particles, along with possible carbides and oxides, and cause material disintegration.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support