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What are the ingredients of the spheroidizing agent?

2019-05-07

Everyone knows about the spheroidizing agent . Do you know what its ingredients are? Let Baotou Fangyuan Rare Earth Alloy Co., Ltd. give you a brief introduction, hope to help you!

In the industrial field, spheroidizing agent is one of the lighter structural metal materials, and it is favored in the market because of its advantages of high specific stiffness, good damping and machinability, and easy recycling. A spheroidizing agent is a metal or alloy that is added to the molten iron to obtain spheroidal graphite cast iron. Ferrosilicon rare earth magnesium spheroidizing agents are commonly used in China.

The main component of the agent is a spheroidizing element such as Mg, Ce, Ca, and the like. The spheroidal graphite in ductile iron is made by spheroidizing the cast iron liquid, which makes the strength much higher than that of gray cast iron, and its toughness is better than that of malleable cast iron. At the same time, it can maintain a series of advantages of gray cast iron. However, the spheroidizing agent used in the casting of ductile iron can increase the tendency of the weld to produce "white mouth" and harden the structure, so that the weld and the heat affected zone (especially the fusion zone) induce cracks. The weldability of ductile iron is worse than that of gray cast iron. Therefore, the spheroidizing agent commonly used in many regions is ferrosilicon rare earth magnesium alloy. Magnesium spheroidizing agent (pure magnesium and magnesium alloy) is mostly used in foreign countries. Spheroidizing agent.

The magnesium content of 4%, 5%, 5.5% is a low-magnesium spheroidizing agent, RE is between 1% and 2%, and is mostly used for smelting of medium-frequency furnace and spheroidal disposal of low-sulfur iron liquid. It has the spheroidal response to warmth and the spheroidal elements are easy to enrich and absorb the strengths. The content of magnesium containing 6% and 7% is a medium-magnesium series spheroidizing agent, which is mostly used in cupola furnace, electric furnace double smelting, or medium frequency furnace smelting pearlite type as-cast ductile iron casting. According to the wall thickness of the casting and the sulfur content of the original molten iron, it is determined that the amount of spheroidizing agent to be met is sufficient, the utility scope is wide, and the spheroidizing disposal punishment process is broad. High-magnesium series spheroidizing agent, which is suitable for smelting in a cupola furnace with a sulfur content of 0.06%-0.09%, and the participation amount is between 1.6% and 2.0%. The low-aluminum spheroidizing agent is used for castings that are susceptible to subcutaneous stomata defects and castings that require aluminum in the molten iron. The spheroidizing agent produced by pure Ce and pure La has less pure mixture of molten iron and rounded graphite balls after spheroid treatment. The spheroidizing agent produced by bismuth-based heavy rare earth is suitable for large-section castings, delaying spheroidization and preventing block graphite. Sb-containing spheroidizing agent is used for pearlitic ductile iron. Low-silicon spheroidizing agents are used in casting workshops that utilize large amounts of recycled materials; nickel-magnesium spheroidizing agents are used in high-nickel austenitic ductile irons.

The above is the composition of the spheroidizing agent introduced to you by Xiaobian. I hope that it will be helpful to everyone. If you want to know more information, please pay attention to our Baotou Fangyuan Rare Earth Alloy Co., Ltd. We will do our best to serve you!

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