The main reinforcement of niobium is solid solubility, precipitation and deformation heat treatmentThe main reinforcement of niobium is solid solubility, precipitation and deformation heat treatment.In niobium alloy, tungsten and molybdenum containing alloy elements can significantly improve the high temperature and low temperature intensity, but too much content will reduce the alloy technology.Tantalum is a medium reinforced element and can reduce the plasticity of the alloy and the temperature of brittle transition.Another way of strengthening the niobium alloy is to add titanium, zirconium and hafnium, and a certain proportion of carbon, forming a mass of carbon carbide, which is fortified by precipitation.In addition, these active elements can improve other properties, such as titanium, which can significantly improve the oxidation and technology of alloys. Hafnium and zirconium can improve the corrosion resistance of molten alkali metal. Hafnium can significantly improve the antioxidant properties and welding properties of the alloy.High strength niobium alloys generally contain a large amount of solid soluble elements (tungsten, molybdenum, tantalum and so on) to strengthen the solid solution, and also adopt the precipitation reinforcement to make the alloy high (see metal reinforcement). These alloy plastic machining is more difficult and requires strict control of deformation process parameters.In addition to nb-10w-1z-0.alloy, the other varieties are added to the medium content of solid soluble reinforcement to ensure that they have excellent comprehensive energy.Low strength alloys can be used to ensure that the alloy has excellent processing energy if it is added to the appropriate amount of titanium, zirconium and hafnium.The high temperature resistance of niobium is poor, and it begins to oxidize rapidly at around 600℃. Although it has developed a high strength niobium alloy with certain antioxidant properties such as wc-3015w-4ta-28hf-2zet, it is far from sufficient to meet the actual requirements, and it still needs to be protected by high temperature antioxidant coatings. The effect of protecting niobium alloy is the si-cr-fe series and the cr----------and al-cr-si coating.