Type of spherulizer
Release time:
2024-07-31
According to the principle of spheroidization and anti-spheroidization element configuration, a variety of spheroidizing agents have been developed at home and abroad, generally the following.
According to the principle of spheroidizing and anti-spheroidizing element configuration, a variety of spheroidizing agents have been developed at home and abroad, generally the following:
Pure magnesium: This is commonly used abroad, the domestic application is relatively small. Pressure plus magnesium to make ductile iron, the advantages and disadvantages are equally obvious.
Copper magnesium, nickel magnesium: China's early use of the alloy, but the high cost, back to the furnace in the accumulation of copper and nickel is difficult to control, resulting in a decline in toughness.
Silicon-magnesium-iron alloy: generally, the lowest magnesium content is 3.5-4.5, the highest is 10-15%, the commonly used alloy is magnesium 5-10%, silicon 42-47%, and the rest is paste. The lower the magnesium content, the more stable the spheroidization reaction and the higher the magnesium recovery rate (the recovery rate of 4% magnesium is 10% higher than that of 9% alloy magnesium), but the low magnesium spheroidizing agent increases the silicon content of molten iron. The spheroidizing agent is used to treat molten iron with low content of sulfur and anti-spheroidizing elements and to pour castings with medium section thickness. At present, in the country to be used in large quantities to manufacture ductile iron will have a certain contradiction with the production conditions and raw material procurement of China's casting enterprises.
Rare earth magnesium alloy: including rare earth magnesium silicon, rare earth calcium magnesium, rare earth copper magnesium and other alloys, is a series of rare earth magnesium alloy nodulizing agents developed by Chinese engineers and technicians based on the reality of our country in the early 1960 s. They combine the advantages and disadvantages of various spheroidizing elements, especially rare earth magnesium calcium alloy, which is the main nodulizing agent widely used in China at present.
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