Comparison of Scraper and Chain Materials for En-masse Conveyors and Application
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Scraper and chain, as the core transmission components of En-masse conveyors, directly determine the equipment's load-carrying capacity, wear resistance, and service life. Their material selection must strictly match the material characteristics (hardness, corrosiveness, temperature) and working conditions (conveying capacity, operating speed, load type). The following provides precise references for industrial conveying scenarios through material property comparisons, application scenario segmentation, and selection principles.
Core Structural Material Classification and Selection
1. Carbon Steel/ Manganese Steel Series (Q235, 16Mn, 45#Steel)
Material Properties: High strength, good toughness and machinability, moderate cost, and the first choice for general working conditions.
Application Scenarios: Conveying materials at room temperature, non-corrosive, and with weak wear, such as coal, cement, grain, and fertilizer.
Optimized Design: The scraper surface can be treated with quenching (hardness up to HRC45-55), and the chain can be processed with carburizing and quenching to enhance wear resistance and extend service life by more than 30%.
2. Stainless Steel Series (304, 316L, 321)
Material Properties: Excellent corrosion resistance, rust prevention, and high-temperature resistance (304 up to 800℃, 316L up to 900℃). It is a sanitary-grade material that meets the standards of the food and pharmaceutical industries.
Application Scenarios:
- 304 Stainless Steel: Conveying damp, weakly corrosive materials (e.g., salt, chemical intermediates, food raw materials).
- 316L Stainless Steel: Strongly corrosive working conditions (e.g., acid and alkali solutions, chlorine-containing materials, chemical waste liquid treatment).
- 321 Stainless Steel: High-temperature corrosive environments (e.g., boiler ash, high-temperature chemical materials).
3. Wear-Resistant Alloy Materials (NM360/ NM400 Wear-Resistant Steel, Alloy Cast Iron)
Material Properties: Ultra-high wear resistance (hardness HRC50-60) and strong impact resistance, suitable for conveying highly abrasive materials.
Application Scenarios: Conveying highly abrasive materials such as ore, quartz sand, furnace slag, and construction waste, which can reduce the replacement frequency of scrapers by more than 50%.
4. Special Materials (Titanium Alloy, Hastelloy)
Material Properties: Extreme corrosion resistance and high-temperature resistance (titanium alloy up to 1200℃, Hastelloy up to 1400℃), but at a higher cost.
Application Scenarios: Extreme working conditions (e.g., strong corrosion, ultra-high temperature, high-purity material conveying) such as aerospace materials, high-end chemical industry, and nuclear industry.
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