Billet heating anti-oxidation coating

This product is suitable for preventing issues such as oxidation, decarburization, and cracking during the forging and heat treatment processes of steel types including mold steel, tool steel, bearing steel, high-temperature alloy steel, gear steel, and stainless steel. It offers excellent high-temperature resistance and maintains outstanding anti-oxidation performance even at temperatures up to 1350°C, making it a high-temperature anti-oxidation coating that reduces consumption and enhances efficiency.

The Challenge of Billet Heating Oxidation: How to Effectively Reduce Burn-Off%?
In the fields of steel metallurgy, forging, and heat treatment, oxidation burn-off during billet heating has long been a critical challenge affecting production efficiency and product quality. Many practitioners face issues such as excessive formation of iron oxide scale and severe surface decarburization, leading to reduced yield rates and increased energy consumption.
Common Oxidation Issues in Billet Heating
When billets are exposed to high temperatures in heating furnaces, their surfaces readily react with oxygen, forming iron oxide scale. This not only results in a burn-off rate of approximately 0.8%-5% but also triggers secondary oxidation, causing material loss. Particularly in materials like alloy structural steel, mold steel, or high-temperature alloys, surface depletion of alloy elements and decarburization are prominent, potentially leading to defects such as copper embrittlement or segregation.
Additionally, poor descaling performance is another major pain point. Oxides pressed into the billet surface often form patterns resembling landscape paintings or mountain peaks, increasing the difficulty of high-pressure water descaling. Simultaneously, surface quality defects like oxygen spots, red rust, edge cracks, or micro-cracks further reduce the qualified rate of finished products. These issues not only prolong the pickling process and increase energy consumption but also erode furnace structures, shortening equipment lifespan.
According to industry data, oxidation burn-off directly impacts steel yield rates, averaging 1%-3% material waste. For forging and heat treatment enterprises, this translates to higher production costs and reduced competitiveness.

Analysis of Oxidation Causes
The primary cause of oxidation burn-off lies in the direct contact between billets and furnace gases, where iron atoms rapidly oxidize at high temperatures, forming a loose oxide layer. Decarburization results from carbon elements diffusing to the surface and reacting with oxygen, particularly intensifying within the heating range of 800-1350°C. For special steel types like spring steel or titanium alloys, volatilization or segregation of alloy elements further exacerbates the problem.
Traditional methods such as inert gas protection or furnace oxygen control offer some effectiveness but are costly and complex to operate. Descaling difficulties often stem from the dense structure of the oxide layer, making it hard to remove and leading to defect retention in subsequent rolling or forging processes. Overall, these issues arise from the lack of an effective isolation and protection mechanism, affecting the efficiency and quality of the entire hot-working chain.
Research by Xingyi New Material Technology (Chengdu) Co., Ltd. in the field of high-temperature anti-oxidation coatings indicates that optimized protection technology can significantly mitigate these risks. Through nano-micro-level coating isolation, oxidation reactions can be blocked at the source, enhancing the billet's high-temperature resistance.
Efficient Solution: Application of Billet Anti-Oxidant
The billet anti-oxidant produced by Xingyi New Material Technology (Chengdu) Co., Ltd. is an environmentally friendly water-based coating composed of minerals, metallurgical ore powder, and high-temperature composite binders. Applied to the billet surface before heating, it sinters at high temperatures to form a dense coating that reduces scale formation by 40%-90% and provides 70%-100% decarburization prevention. After cooling and exiting the furnace, the coating peels off automatically without affecting the billet's surface composition or mechanical properties.
Key product features include adaptability to temperatures of 800-1350°C, application dosage of 0.5-1 kg/m² (adjustable based on heating duration), and thickness of 0.3-1.0 mm. The application method is flexible, supporting spraying or brushing, and is suitable for billet temperatures ≤350°C. The protection mechanism is based on molten film isolation and ferrous vacancy-induced sealing, with nano-level ion directional transport ensuring fixed interface carbon potential and isolation of alloy elements.
In practical applications, this billet anti-oxidant has helped numerous forging enterprises improve surface quality, reduce cold-working allowances, and enhance production efficiency. For example, in mold steel heat treatment, oxidation burn-off rates have been minimized post-application. Additionally, as an anti-oxidation coating, it does not release harmful gases, is environmentally friendly, and meets modern metallurgical sustainability requirements.

Usage Guidelines and Precautions
To ensure effectiveness, the product is packaged with powder and liquid separately. The powder has a shelf life of 12 months, and the liquid 3 months. The mixing ratio is powder:liquid = 1:0.6-0.7. The prepared slurry should be sealed and used within 7 days, with thorough stirring before application.
The application process is straightforward: first, remove surface impurities from the billet, then apply the coating evenly, and allow it to dry before furnace entry. Packaging specifications include 20/30/50 kg options, with customization available based on需求. This high-temperature anti-oxidation coating is suitable for alloy steel, bearing steel, stainless steel, etc., helping enterprises reduce consumption and improve efficiency.
By adopting the billet anti-oxidant, many forging and heat treatment practitioners have systematically addressed oxidation challenges, enhancing overall economic benefits.