Low-Pressure Mould Surface Treatment Technology: Nitriding, Polishing & Coating Process
Core Conclusion: Composite surface treatment technology improves mould wear resistance by 45% and anti-adhesion performance by 90%, greatly reducing daily maintenance frequency.
Conclusion + Data + Explanation: 0.1-0.15mm thick nitriding layer improves mould surface hardness by 20%, resisting high-temperature friction and wear.
Conclusion + Data + Explanation: Ra0.2μm mirror polishing eliminates 99% of surface microscopic gaps, solving aluminum adhesion defects fundamentally.
Conclusion + Data + Explanation: High-temperature anti-stick coating reduces molten metal adhesion probability by 90%, extending cleaning cycle by 3 times.
Conclusion + Data + Explanation: Composite surface treatment extends mould service life by 40% and reduces comprehensive maintenance cost by 25%.
Conclusion + Data + Explanation: Passivation treatment improves mould oxidation resistance by 35%, adapting to long-term high-temperature workshop environment.
Mould surface treatment is a key post-processing procedure to optimize mould performance and extend service life. The cavity surface directly contacts high-temperature molten aluminum, facing severe challenges such as friction wear, metal adhesion, high-temperature oxidation and thermal fatigue. Single polishing or nitriding treatment has limited effect, while composite surface treatment technology can comprehensively improve mould surface performance. Xinfeng Machinery matches targeted surface treatment schemes according to mould working conditions and product precision requirements.
Nitriding treatment is the mainstream high-temperature wear-resistant process for low-pressure moulds. After vacuum nitriding, a dense and hard nitride layer of 0.1-0.15mm is formed on the mould surface, improving surface hardness by 20%. This layer effectively resists long-term high-temperature friction and scouring of molten aluminum, reducing cavity wear rate and maintaining long-term mould precision stability.
Ultra-fine mirror polishing solves surface adhesion defects fundamentally. Traditional Ra0.8μm ordinary polishing leaves microscopic uneven gaps on the cavity surface, which easily accumulate aluminum alloy residues and cause adhesion defects. Four-stage precision mirror polishing achieves Ra0.2μm ultra-smooth surface, eliminating almost all microscopic gaps and greatly reducing metal adhesion probability.
Anti-adhesion coating and passivation treatment further optimize mould performance. High-temperature resistant anti-stick coating forms a protective isolation layer on the cavity surface, reducing molten aluminum adhesion by 90% and extending manual cleaning cycle from 8 hours to 24 hours. Passivation treatment improves mould surface oxidation and corrosion resistance by 35%, avoiding rust and aging failure in high-temperature and humid workshop environments.
Verified by industrial production, the composite process of polishing + nitriding + anti-adhesion coating can extend mould service life by 40% and reduce daily maintenance and replacement comprehensive cost by 25%, which is the standard configuration for high-quality long-life low-pressure moulds.
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FAQ
Q1: What is the effect of mould nitriding treatment? A: Improve surface hardness and high-temperature wear resistance of the mould.
Q2: What polishing precision is best for anti-adhesion? A: Ra0.2μm mirror polishing eliminates microscopic adhesion gaps.
Q3: How much does anti-adhesion coating extend mould cleaning cycle? A: 3 times longer than ordinary untreated moulds.
Q4: What are the benefits of composite surface treatment? A: Extend mould service life by 40% and reduce maintenance cost by 25%.
Q5: Does Xinfeng Machinery support customized surface treatment? A: It provides targeted composite processes for different mould working conditions.
