The production base of SAMC’s alloy powders possesses 20 years of experiences in German alloys design and welding processes. Alloy powders are fabricated by international high-grade gas and water atomization with uniform powder compositions, low oxygen content, good spherical shapes, good flexibility, and complete range of specifications. Therefore, during the applications of powders, SAMC’s powders can be fed smoothly without congestion and adhesion. SAMC’s advantages include precise compositions, excellent particle sizes control, fast delivery, customized compositions, etc. All powder products are thoroughly inspected by SAMC’s materials R&D center, and we offer great customer service to help our clients with their problems regarding the production and manufacturing process.
Iron-Based Alloy Powders
Iron-based alloy powders are self-fluxing powders, mainly composed of iron, chromium, boron, silicon, etc. These powders are mainly used for “wear-resistant mechanical parts” working at temperatures as high as 500°C. Compared to nickel- and chromium-based alloy powders, iron-based powders are more advantageous in terms of costs, and have more application fields.
Cobalt-Based Alloy Powders
Cobalt-based alloy powders mainly consist of cobalt alloy matrices and the addition of tungsten carbide. The reaction between tungsten and cobalt alloy matrices leads to solution strengthening, while tungsten carbide particles can provide precipitation strengthening effect. The double strengthening effects make the alloy materials remain excellent strength and hardness even at high-temperature environments. Cobalt-based alloy materials great high-temperature wear resistance and oxidation resistance, so they are suitable for applications in high-temperature environments.
(Reminder: The crystal structure of cobalt transforms from hexagonal closed packed into face-center cubic when the temperature increases to beyond 417°C, which causes internal stress. To avoid the rupture of the welding layer, workpieces should be pre-heated to around 500 – 600°C before cladding or spraying.)
Nickel-Based Alloy Powders
Nickel-based alloy powders are mainly composed of nickel, chromium, boron, silicon, etc. Copper, molybdenum, and other elements may also be included under certain circumstances. Nickel-based alloy powders can be applied to various manufacturing processes, such as plasma spraying, HVOF, plasma welding, casting, additive manufacturing, etc. Nickel-based alloy powders have good corrosion resistance, oxidation resistance, and wear resistance. Therefore, they are often used as surface strengthening coatings of stop logs, globe valves, screw rods, cylinders, wind turbines, etc.
Alloy Welding Rods
SAMC provides continuously casted alloy welding rods with quality at the international level, including “cobalt-based“ and “nickel-based” rods with diameters of 2.8 – 8.0 mm. The alloy welding rods products have complete size specifications, uniform compositions, no segregation, low impurity, good flowability, small size tolerance, and customized rod lengths. The alloy welding rods are suitable for gas and arc welding.
Hardfacing Welding Rods
SAMC provides “iron-based hardfacing welding rods” with diameters of 1.2 – 5.0 mm and alloying content higher than 15%. Based on the microstructure, our products can be divided into “martensitic alloy steels”, “martensitic stainless steels”, “high-chromium cast iron”, and “tungsten carbide” series. The welding rods can serve as uniform fillers with small diameter tolerance and can be applied to different manufacturing process, such as arc welding, submerged-arc welding, atmospheric plasma spraying, oxy-acetylene spraying, etc. The hardfacing welding rods are suitable for strengthening of wear/corrosion/high temperature resistant mechanical parts in fields like metallurgy, mining, and energy industries.
New Type Copper Alloys
New type copper alloys have great mechanical properties, wear resistance, corrosion resistance, and exceptional electric/thermal conductivity.
The “non-sparking alloys” designed by SAMC do not contain the highly toxic element beryllium and have more competitive prices. The hardness of the alloys can reach as high as HRC 38 after optimal heat treatment procedure. The non-sparking property makes the alloys excellent candidates for equipment parts or hand tools used in flammable environments such as factories with fine dust. The high hardness, wear resistance, and excellent electric/thermal conductivity also make the non-sparking alloys suitable for semiconductor probes to replace the traditionally used, expensive, and toxic beryllium copper alloys.
The “self-lubricating alloys” developed by SAMC can reach the hardness value of HRC 30 after optimal heat treatment process, and they can serve as the worm screws and wheels in the fourth axis of machine tools. Compared to conventional copper alloys, the great wear resistance of our self-lubricating alloys can effectively extend the service life of machine parts.
High-entropy alloys break away from the traditional concept that alloys can only consist of one major element, and help explore many innovative properties of metallic materials, which also implies the huge market potential for high-entropy alloys.
SAMC closely collaborates with the High-Entropy Materials Research Center (HEMRC) at the National Tsing Hua University. The HEMRC provides innovative concepts and advanced research technologies, while SAMC transforms innovative ideas into great products that fit well in specific markets. Through combining the latest technologies in the world and the real demand of the industry, SAMC is about to implement disruptive innovations to the industry and bring enormous value addition to our customers.