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Wuxi Junteng Fanghu Alloy Technology Co., Ltd.
Since 2006, we have been dedicated to designing and manufacturing alloy steel components. We are OEM Ni-Hard Cast Iron Concrete Mixer Mixing Blades for Construction Mixing Stations Suppliers and Ni-Hard Cast Iron Concrete Mixer Mixing Blades for Construction Mixing Stations Factory.
Our primary products include heat treatment fixtures, radiant tubes, furnace rollers, fan blades, furnace rails, wheels, and various other alloy parts for furnaces. We offer technical assistance to customize or optimize your heat treatment fixtures, helping our customers discover cost-effective solutions to enhance the efficiency of their heat treatment operations.
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Wuxi Junteng Fanghu Alloy Technology Co., Ltd.
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Ni-Hard Casting Industry knowledge

What are the typical applications of Ni-Hard castings in the mining, concrete, and gravel industries?

1. Mining Crushing and Grinding Equipment: Due to its high hardness and wear resistance, Ni-Hard castings are widely used in key components such as ball mill liners, hydraulic breakers, grinding rollers, and conveying pipelines, maintaining a long service life during high-load ore crushing and grinding processes.

2. Concrete Mixing and Conveying Systems: In concrete mixers, conveying screws, and pump casings, Ni-Hard castings can withstand the strong impact and abrasion of concrete particles, improving equipment reliability and maintenance intervals.

3. Gravel Conveying and Sandblasting Equipment: Used in gravel conveying pipelines, sandblasting nozzles, and blower blades, Ni-Hard's high hardness and impact resistance ensure that it is not easily worn or deformed in high-speed, sand-containing media environments.

4. Other High-Abrasion Applications: Ni-Hard castings can be used in applications such as mining screens, slag conveying pumps, and steel rolling mill rolls to provide dual protection against wear and impact.

How do Ni-Hard castings perform in high-temperature, humid environments?

1. High-Temperature Oxidation Resistance: Ni-Hard alloys contain approximately 1.4–2.5% chromium and 3.4–4.75% nickel. These two elements form a dense oxide film on the surface at operating temperatures of 300–400°C, significantly enhancing oxidation resistance.

2. Corrosion Resistance in Humid Environments: Studies show that Ni-Hard castings maintain good corrosion resistance in humid or water-vapor-containing environments, mainly due to the protective oxide layer formed by chromium and the passivation effect of nickel. This results in a much lower mass loss rate under high-temperature, humid conditions compared to ordinary high-chromium white cast iron.

3. Effect of Heat Treatment on Corrosion: High-temperature quenching or tempering can adjust the proportion of retained austenite in the matrix. A moderate amount of retained austenite helps form a fine martensite-austenite mixed structure on the working surface, further improving resistance to crack propagation and corrosion cracking.

4. Practical Application Verification: In field applications of ball mill liners and gravel conveying pipelines in mines, Ni-Hard castings exhibited extremely low corrosion rates and stable mechanical properties under long-term high-temperature and humid working environments, verifying their excellent corrosion resistance.