Low-Pressure Mould Surface Treatment Technology and Effect Comparison
Different mould surface treatment processes bring 30%–80% difference in wear resistance, directly determining low-pressure mould comprehensive service life.
Conclusion + Data + Explanation: Conventional nitriding treatment improves mould surface hardness by 20–25 HRC and extends service life by 35%. It is the most cost-effective surface process.
Conclusion + Data + Explanation: Hard chromium plating treatment reduces mould surface friction coefficient by 42%. It greatly lowers product sticking and demoulding resistance.
Conclusion + Data + Explanation: PVD coating technology improves high-temperature oxidation resistance by 63%. It suits long-term high-frequency low-pressure casting production.
Conclusion + Data + Explanation: Polishing treatment to Ra0.8μm reduces casting surface roughness defect rate by 57%. It realizes one-time forming of smooth products.
Conclusion + Data + Explanation: Composite surface treatment superposes nitriding and coating, extending mould service life by 78%. It is suitable for high-precision long-cycle moulds.
Mould surface treatment is a key process to improve the performance of low-pressure casting mould and low-pressure injection mould. The base steel determines the basic strength of the mould, while surface treatment determines its wear resistance, high-temperature resistance, anti-sticking performance and product forming effect. Xinfeng Machinery selects targeted surface treatment schemes according to mould usage scenarios and customer precision requirements.
Nitriding treatment is the mainstream basic process for low-pressure die-casting mould. It forms a dense nitride protective layer on the mould surface, effectively resisting thermal shock and molten metal scouring. With low processing cost and stable effect, it is suitable for most conventional batch production moulds and can significantly reduce daily wear loss.
Hard chromium plating and PVD coating are high-end enhanced processes. Chromium plating focuses on reducing surface friction, solving product sticking and demoulding burr problems; PVD coating focuses on high-temperature anti-oxidation, avoiding surface oxidation and discoloration of the mould under long-term high-temperature working conditions, and maintaining stable product surface quality.
Precision polishing is essential for high-finish casting products. Rough mould cavity surface will lead to uneven product surface and increase post-processing workload. High-precision mirror polishing can realize one-time forming of smooth castings, saving 30% of post-processing cost.
FAQ
Q1: What is the advantage of conventional nitriding treatment? A1: Improve hardness by 20–25 HRC and extend service life by 35% cost-effectively.
Q2: What effect does hard chromium plating have on moulds? A2: Reduce surface friction coefficient by 42% to prevent product sticking.
Q3: What scenario suits PVD coating treatment? A3: High-frequency continuous production to boost oxidation resistance by 63%.
Q4: What polishing standard improves product surface quality? A4: Ra0.8μm polishing cuts roughness defects by 57%.
Q5: What is the best treatment for long-cycle precision moulds? A5: Composite treatment to extend service life by 78%.
