HY-industry:One company of Specialist for stellite (HY-Technology center)

HY-industry was founded in March 1990. It was founded by Ms. Grace and Mr. Ferguson with a registered capital of 50 million RMB. The product range of HY stellite series products involves military, aerospace, machinery manufacturing, petroleum and petrochemical, coal mining. Mining, metal addition, spraying and other industries.
In 1907, American Elwood Hayness, based on C, W, Cr, and Co, was able to rely on carbide strengthening to a large extent, and the structure was stabilized from room temperature to melting point temperature, creating a stellite. Especially on the sliding and contact valve sealing surfaces, it can show the characteristics of this material. However, in the case of high-stress abrasive wear, the wear resistance of Co, Cr, and W alloys with low C is not as good as that of low carbon steel.
The most commonly used ones are stellite1, stellite6, stellite12, and Stellite21. They are cast low-carbon, medium-carbon, high-carbon cobalt-chromium-tungsten alloy surfacing wire. The surfacing layer has good corrosion resistance, heat resistance and wear resistance. These properties can be maintained at 800 °C.

Stellite 1: contains the highest amount of C and W, so the hardness is the highest, the wear resistance is very good, but the impact resistance is poor, the plasticity is the worst, the whole heating is required during welding, the small current is fast welded, the weld bead is prevented from deforming, and the stress cracking is formed.
Stellite 6: contains C and W at the lowest and is the best toughness. Therefore, it can withstand the impact under cold and hot conditions, and the possibility of cracks is small.
Stellite 12: contains C, W centered, medium hardness, Kovar wear resistance is better than stellite6, but the plasticity is slightly worse. Both can be cut with a carbide tool, and the metallographic structure is a solid solution (austenite) containing W, Cr, Co and a chromium-tungsten composite carbide eutectic.
Stellite 21: contains up to 5.5% Mo. It is a low carbon cobalt-chromium alloy strengthened with Mo. It has low hardness at room temperature, but has improved hardness after cooling. It has good high temperature corrosion resistance, erosion resistance and excellent toughness. And comprehensive mechanical properties, suitable for surfacing welding of various hot stamping dies.