1. What material is cobalt-based alloy?
Cobalt-based alloy is composed of Cobalt and chromium, tungsten, iron, nickel in one or several groups (Cobalt), the element symbol Co, silver-white ferromagnetic metal surface is silver-white, slightly pale pink, located in the fourth cycle of the periodic table and the first cycle group Ⅷ, atomic number 27.
The atomic weight is 58.9332, hexagonal crystals are densely arranged, and the common valence is 2. Cobalt is a shiny steel-gray metal, hard and brittle.
Ferromagnetic heating to 1150℃ When the magnetism is lost, it is not affected by water at room temperature and is also very stable in humid air. Cobalt-based alloy is a germplasm alloy that can withstand various wear, corrosion and high temperature oxidation.
That is commonly referred to as cobalt-chromium-tungsten (molybdenum) alloy or Stelli (cobalt-based alloy with cobalt as the main component, containing a considerable amount of nickel, chromium, tungsten and a small amount of molybdenum, niobium, tantalum, titanium, haze.
2, What is the most significant feature of cobalt chromium molybdenum alloy?
Cobalt-chromium-molybdenum alloy (CoCrMo) It is one of the cobalt-based alloys, often referred to as Stellite, an alloy that is wear-resistant and corrosion-resistant to cobalt. The initial cobalt-based alloy was a cobalt-chromium binary alloy, and then developed into a cobalt-chromium-tungsten ternary, and then developed into a cobalt-chromium-molybdenum alloy.
Cobalt-chromium-molybdenum alloy is a cobalt as the main component, containing a considerable amount of chromium, molybdenum and a small amount of nickel, carbon and other alloying elements, occasionally containing iron alloys. Depending on the different components in the alloy, they can be made into welding wires and hard-faced surfacing powders.
Casting and forging parts and powder metallurgy parts can also be made into casting and forging parts and powder metallurgy parts.
3, cobalt chromium alloy and titanium alloy which is good?
For example:
Cobalt chromium porcelain teeth: cobalt chromium alloy porcelain teeth – nickel chromium alloy porcelain teeth, mainly for nickel and beryllium toxicity, biocompatibility is better than nickel chromium alloy, not easy allergy, corrosion resistance.
Compared with nickel-chromium porcelain teeth, the problem of black gum line is significantly improved, but there are still a few people with black gum line problems, which can not be distinguished by the naked eye.
Titanium alloy porcelain teeth: the main components of nickel, chromium and a small amount of titanium, titanium content is very low.
At present, 4% of titanium alloys used in hospitals and clinics have undergone a variety of processes, and the titanium content of 6% is very low, which is almost no difference with nickel-chromium alloy. Therefore, this metal simply cannot play the excellent biocompatibility of titanium, and is only an excuse and means for clinics to raise fees.
