Cast steel shot is a metallic abrasive widely used in industrial surface treatment, characterized by high strength, high wear resistance, and long service life. The following is a comprehensive analysis of its product introduction:
1. Definition and Chemical Composition
Cast steel shot is primarily made from scrap steel and discarded steel wire ropes, processed through electric furnace refining, centrifugal forming, and heat treatment. Its chemical composition ranges are as follows:
Carbon (C): 0.70%~1.20%
Manganese (Mn): 0.35%~1.20%
Silicon (Si): 0.40%~1.50%
Sulfur (S), Phosphorus (P): ≤0.05%
2. Production Process and Performance
Production Process: Utilizes double quenching and medium-temperature tempering technology to eliminate original structural defects, forming uniform tempered martensite and dispersed carbide structures, ensuring high hardness (HRC40-60, HV350-720), high density (≥7g/cm3), and high toughness.
Performance Advantages: Service life is 5-6 times that of white iron shot and 2-3 times longer than traditional cast tempered steel shot. It can extend the lifespan of shot blasting machine blades by nearly 10 times while improving workpiece surface smoothness and production efficiency by 28.6%.
3. Application Areas
Cast steel shot is widely used in the following scenarios:
Cleaning and Descaling: Casting descaling, rust removal for steel plates/steel materials/steel structures, and forging scale cleaning.
Surface Strengthening: Shot peening strengthening for gears and mechanical parts to enhance fatigue resistance.
Pretreatment: Surface roughness treatment before coating and electroplating to improve coating adhesion.
Applicable Industries: Foundry, shipbuilding, automotive, railway, aerospace, mining, metallurgy, etc.
Quality and Certification
- **Production Standards**: Complies with international specifications such as Chinese National Standard (GB/T18838.3), American SAE, ISO 11124-3, and U.S. Military Standard (MIL-S-851).
- **Certification**: Some enterprises are certified under the ISO9001 Quality Management System and participate in national standard formulation, such as Shandong Kaitai, which drafted four national standards.
Summary
With its excellent wear resistance and adaptability, cast steel shot has become a core material in industrial surface treatment, suitable for high-speed, high-intensity shot blasting equipment. Its performance advantages and standardized production have earned it widespread recognition in domestic and international markets, particularly excelling in high-intensity operational scenarios. Users can select products of different specifications and certified brands based on specific needs.