Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of graphitized carburizer 0-0.2mm in China. With a professional production team, we are able to meet the needs of the majority of our customers. If you're going to wholesale bulk graphitized carburizer 0-0.2mm made in China, welcome to get pricelist from our factory.
This 0-0.2mm ultra-fine graphitized carburizer is processed via ultra-fine grinding and air classification with rigorous control over powder fineness. Thanks to its extremely small particle size, it disperses rapidly and evenly throughout the molten bath without insoluble residues of coarse particles. In addition to fine carbon adjustment for molten iron in precision casting, this powdered carbon material is also suitable for pre-mixed batching, enabling customers to achieve precise fine-tuning of carbon content in high-end castings.
This 0-0.2mm powdered graphitized carburizer undergoes prolonged ultra-high-temperature graphitization followed by ultra-fine grinding and air classification, forming fully developed flaky graphite crystals. It features a relatively large specific surface area and dissolves rapidly upon contact with molten iron. Nevertheless, the powder imposes certain requirements on feeding methods to minimize oxidative burnout on the surface. Apart from precision casting of gray cast iron and nodular cast iron, it can also be applied to powder metallurgy batching and resin-bonded refractory materials. It promotes uniform carbon distribution within the matrix and stabilizes the mechanical properties of castings and refractory products.
This 0-0.2mm graphitized carburizer adopts low-nitrogen calcined petroleum coke as raw material. It is subjected to ultra-high-temperature graphitization, ultra-fine grinding, air classification and magnetic iron removal to obtain powder with consistent and stable fineness. Owing to its large specific surface area, the powder dissolves quickly in molten iron. It is suitable for fine carbon adjustment in precision casting and can also be used for batching in powder metallurgy and resin-bonded refractory materials to ensure uniform carbon dispersion inside the material matrix. Supported by the ISO quality management system, each batch is tested for fixed carbon, nitrogen, sulfur and particle size distribution, supplying premium powdered carbon raw materials for high-end foundries and refractory manufacturers.
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FAQ
What process risks are brought by the large specific surface area of the 0 0.2mm powdered carburizer?
A large specific surface area accelerates oxidation of the powder when passing through the high-temperature atmosphere inside the furnace. Improper feeding leads to severe burnout, low carbon recovery and significant fluctuations.
Why is the air classification process mandatory for this ultra-fine grade product?
Air classification can effectively remove a small number of oversize coarse particles generated during grinding. It ensures particle size is basically controlled within the 0 0.2mm range and prevents sporadic coarse particles from impairing the quality of precision castings.
Can the 0 0.2mm graphitized carburizer be dry pre-mixed with other alloy powders in advance?
Dry pre-mixing is permissible. However, high-intensity mechanical stirring shall be avoided. Violent friction generates extra ultra-fine dust and increases the risk of dust explosion in the workshop.
What positive effects can this fine powder deliver when used for the production of resin-bonded refractory materials?
The powder disperses uniformly inside the resin matrix and forms a continuous carbon network. It improves the thermal shock resistance of refractory bricks and reduces cracking tendency under fluctuating temperature conditions.
What feeding method is recommended for the 0 0.2mm powdered carburizer in medium-frequency induction furnaces?
Injection of the powder beneath the molten iron surface using inert carrier gas is preferred. Manual sprinkling from above the furnace mouth is not recommended, as direct exposure to furnace flame will cause severe oxidative loss.
What special precautions should be taken for warehousing of this ultra-fine powdered carburizer?
Keep away from open flames and strong oxidants. The packaging must remain tightly sealed. Long-term exposure to humid air easily causes agglomeration and degrades the good flowability of the powder.
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