Sulzer Metco Material Product Data Sheet Pure Chromium Carbide Powder for Thermal Spray Thermal Spray Powder Products: Metco 70C-NS 1 Introduction Metco 70C-NS is coarse chromium carbide powder with 99.0%+ Cr3C2 phase and an orthorhombic crys- talline structure. The remaining constituents consist of hexagonal phases of chromium and carbon (as Cr7C3 and Cr23C6). The powder has been designed for coating application using atmospheric plasma spray. Sprayed coatings of Metco 70C-NS can withstand tem- peratures above 535 °C (995 °F). The carbide coatings have a high percentage of porosity when sprayed with- out any binder as a result of poor interparticle cohesion. These factors lower the high temperature and erosion resistance that would otherwise allow coatings of this material to perform well at temperatures up to 1100 °C (2010 °F). The benefits of the chromium carbide can be maximized by spraying it with a metal matrix that can act as a binder and increase the stability of the coating as well as form a uniform bond with the substrate. Typically, chromium carbide coating technology is of great interest because of its high hardness, thermal sta- bility, wear and oxidation resistance. As the coatings SEM Photomicrograph of Metco 70C-NS. Top: Morphology, have a thermal coefficient of expansion similar to that of bottom: cross-section. steel, residual coating stresses at the coating-substrate interface are reduced on steel substrates. It is also used Quick Facts as an excellent grain growth inhibitor during sintering of Classification Carbide, chromium-based WC-Co cutting tools. Chemistry Cr3C2 Dense sintered / fused and 1.1 Typical Uses and Applications: Manufacture crushed Morphology Angular / blocky • Piston rings Melting point 1930 °C (3506 °F) • High friction coatings (brake pads) • Rod mandrels Service Temperature ≤ 900 °C (1650 °F) • Hot forming dies 3 Apparent Density 2.7 – 3.0 g/cm • Machine parts High temperature wear, oxidation Purpose • Hydraulic valves and corrosion resistance • Wear protection on aluminum parts Process Atmospheric plasma spray • Grain refinement in carbide cutting tools Pure Chromium Carbide Powder 1/3 DSMTS-0087.1 • © 2012 Sulzer Metco Sulzer Metco 2 Material Information 2.1 Chemical Composition Nominal Chemical Composition (wt. %) Phase (wt. %) Product Cr C Cfree Fe Cr3C2 Metco 70C-NS 86 13 ≤ 0.3 ≤ 0.7 99 2.2 Particle Size Distribution Product Nominal Particle Size Distribution (µm) D90 (µm) D50 (µm) D10 (µm) Metco 70C-NS -106 +45 105 – 110 70 – 75 45 – 50 Upper particle size determined by sieve analysis, lower particle size analysis by laser diffraction (Microtrac). 2.3 Key Selection Criteria • Metco 70C-NS is often blended by customers with • Choose Metco 70C-NS when coatings are required that have: various types of nickel-chromium powders. These nickel-chromium materials are also available from Sul- • High microhardness (1200 HV) zer Metco. Please contact your account representative • High wear resistance at high temperatures for information on these products to meet your specific • High temperature corrosion and oxidation resistance requirements. • High friction surfaces 2.4 Related Products resistance as Metco 70C-NS at temperatures as high • Amdry 5843, Diamalloy 5849 and Sulzer Metco 5842 as 870 °C (1600 °F). are resistant to erosion and abrasion and can also be used in contact with water-based solutions. These • Diamalloy 3006 and Diamalloy 3007 are chemically materials are recommended for service temperatures clad chromium carbides that are used for very dense up to 500 °C (930 °F). coatings that are good for high temperature corrosion and wear resistance. • WOKA 36XX series materials are best chosen for appli- cations where both corrosion and erosion protection are • WOKA 71XX series products are agglomerated and required at service temperatures up to 500 °C (930 °F). sintered chromium carbide particles embedded in a nickel-chromium matrix. These products pro- • Metco 81NS, Metco 81VF-NS and Diamalloy 3004 are duce extremely hard coatings with excellent resis- chromium carbide - nickel chromium blends that have tance to wear and corrosion, especially in alkaline better deposition efficiency with less decarburiza- environments. tion. These materials exhibit similar wear and abrasion Pure Chromium Carbide Powder 2/3 DSMTS-0087.1 • © 2012 Sulzer Metco Sulzer Metco 3 Coating Information 3.1 Key Thermal Spray Coating Information Specification Typical Data Recommended Spray Process Atmospheric Plasma Spray Maximum Service Temperature 900 °C 1650 °F Finishing Method Wet grind using 60 grit silicon carbide wheels 3.2 Available Coating Parameter Sheets: For specific application requirements, the services of Sul- zer Metco Coating Solution Centers are available. Please contact your local Sulzer Metco Account Representative. 4 Commercial Information 4.1 Ordering Information and Availability Product Order No. Package Size Availability Distribution Metco 70C-NS 1000588 12.5 lb (approx. 5.7 kg) Stock Global 4.2 Handling Recommendations • Store in the original container in a dry location. • Open containers should be stored in a drying oven to • Tumble contents gently prior to use to prevent prevent moisture pickup. segregation. 4.3 Safety Recommendations See MSDS 50-127 (Materials Safety Data Sheet) in the material will be used. MSDS are available from the Sulzer localized version applicable to the country where the web site at www.sulzer.com (Resources – Online Tools). www.sulzer.com • info@sulzermetco.com Sulzer Metco (US) Inc. Sulzer Metco (Japan) Ltd. Sulzer Metco Europe GmbH Sulzer Metco AG (Switzerland) Sulzer Metco (Singapore) Pte. Ltd. 1101 Prospect Avenue 4-2 Hikawadai 3-Chome, Spreestrasse 2 Rigackerstrasse 16 2 Loyang Lane Westbury NY 11590 Nerima-ku, Tokyo 179-0084 65451 Kelsterbach 5610 Wohlen # 06-02 USA Japan Germany Switzerland Singapore 508913 Tel. +1 516 334 1300 Tel. +81 359 203 302 Tel. +49 6142 6033 0 Tel. +41 56 618 81 81 Tel. +65 6545 0870 Fax +1 516 338 2414 Fax +81 359 203 512 Fax +49 6142 6033 400 Fax +41 56 618 81 01 Fax +65 6545 0816 Information is subject to change without prior notice Pure Chromium Carbide Powder 3/3 DSMTS-0087.1 • © 2012 Sulzer Metco