2025-11-14 14:34:30 hits:72

How to Extend the Lifespan of a Flat Die Pellet Mill? Material Selection and Heat Treatment Processes Revealed!

I. Pain Point Analysis: Why are flat die molds prone to damage? 

The die of a flat die pellet mill is a core wear component, and its lifespan directly affects production efficiency and cost. Common die problems include:

1. Rapid wear: Fibrous raw materials (such as palm shells, straw) or high-impurity materials accelerate die hole deformation;

2. Surface peeling: Substandard heat treatment processes lead to uneven surface hardness, and stress concentration causes cracks;

3. Fatigue fracture: An unreasonable die structure design leads to brittle fracture after long-term exposure to high-frequency impacts.

II. Core Breakthrough: Synergistic Optimization of Material Selection and Heat Treatment

1. Material Selection Standards: From "Usable" to "Durable"

The purity and alloy ratio of the die steel determine its inherent performance. We prioritize the following:

· High-chromium alloy steel (e.g., Cr12MoV, D2): Chromium content ≥12%, uniform carbide distribution, and wear resistance improved by over 50%;

· Vacuum degassing process: Reduces oxide impurities in the steel, avoiding micro-crack initiation.

 

2. Heat Treatment Process: Precise Control of Quenching + Tempering 

· Deep Carburizing and Quenching: Heating the mold to 920℃~950℃ allows carbon to penetrate to the surface layer 1.5~2mm, achieving a hardness of HRC58-62;

· Three-stage High-Temperature Tempering: Repeated tempering at 520℃~560℃ eliminates internal stress, increases toughness by 30%, and prevents cracking during use.

Ⅲ. Daily Maintenance Recommendations: Practical Guide to Extending Service Life

1. Standard Use:

o Avoid prolonged idling to prevent dry friction between the mold and the pressure roller;

o Before stopping the machine, feed an appropriate amount of oily material (e.g., rice bran) to lubricate the mold orifice.

 

2. Regular Maintenance:

o Check the smoothness of the mold holes every 200 working hours and remove burrs with a drill bit;

o Apply rust-preventive oil during storage to prevent rusting in humid environments.

Conclusion: Technology Empowers Worry-Free Mold Life Extension

Extending mold life is a deep integration of materials science, process design, and usage and maintenance. [Your Company Name] helps customers control mold costs to unprecedented low levels through a three-pronged solution of material selection optimization—heat treatment upgrade—maintenance guidance.