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  6. Performance Comparison of Spectacle Plates in Cast Iron, Alloy and Ceramic Grades

Performance Comparison of Spectacle Plates in Cast Iron, Alloy and Ceramic Grades

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“ Performance Comparison of Spectacle Plates in Cast Iron, Alloy and Ceramic Grades ”

1. High-chromium cast iron  

Hardness: ≈ HRA 82  

Wear resistance: moderate  

Advantages: excellent castability, low unit cost, conventional machining possible  

Drawbacks: low thermal conductivity, poor ductility, high solidification shrinkage → prone to hot-cracking during casting and to through-thickness cracking of the wear layer in service, sharply reducing component life.

 


2. Cemented tungsten-carbide (hard metal)  

Hardness: ≈ HRA 86  

Wear resistance: high  

Limitations: very poor weldability, difficult to machine, high material price → restricted to special applications only.

 


3. Technical ceramic (ZTA grade)  

Hardness: ≥ HRA 88 (ZTA zirconia-toughened alumina ≥ HRA 90)  

Wear resistance: significantly superior to high-Cr iron and slightly better than cemented carbide  

Cost: moderate—lower than hard metal, slightly higher than high-Cr iron  

Additional benefits: mirror-smooth surface and built-in solid lubrication phase further lower the friction coefficient and abrasive wear rate  

Toughness: intrinsically low, but transformation toughening via ZrO₂ dispersion (ZTA) raises fracture toughness to a level acceptable for typical pump pressures  

Outcome: a cost-effective, readily implemented wear-protection solution for spectacle plates.

Author： ROOBON TECH

From： www.roobon.com
Performance Comparison of Spectacle Plates in Cast Iron, Alloy and Ceramic Grades
Performance Comparison of Spectacle Plates in Cast Iron, Alloy and Ceramic Grades
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ROOBON TECH    

   Founded in 2009, Roobon is based in Changsha, the world’s largest manufacturing base for concrete pumps. We specialize in R&D, production and customized solutions of concrete pumping and placing equipment. 

    Backed by professional technical and management teams, all products are produced per unified industry standards. Equipped with premium core components including high-performance engines, oil pumps and hydraulic valve sets, our products feature outstanding mobility and strong site adaptability. 

  We iterate and upgrade products via on-site operation data and customer feedback to realize intelligent, practical and cost-effective product optimization.


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