Metal Shear Blade Material Properties
The material of metal shear blades significantly impacts service life, primarily through hardness, wear resistance, toughness, and high temperature resistance properties.
Key Material Properties
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Hardness
High-carbon high-chromium alloy tool steel (Cr12MoV) achieves >60HRC, enabling cutting of harder steels while reducing edge wear.Note: Excessive hardness reduces toughness, increasing fracture risk under impact loads
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Wear Resistance
Requires tough substrate material due to inherent brittlenessTungsten Carbide (WC)
3-5× wear resistance vs. standard alloy steelApplications
Ideal for abrasive materials with surface impurities -
Toughness
High-speed steel (W6Mo5Cr4V2) combines hardness with impact absorption, suitable for thick/high-strength materials.Coating Technology
TiN coatings increase surface hardness without compromising core toughness -
High Temperature Resistance
Molybdenum (Mo) and vanadium (V) form stable carbides that maintain cutting ability at elevated temperatures.Red Hardness
Preserves blade integrity against friction heat
In practice, optimal blade performance requires balancing these material properties based on the hardness, thickness, and working conditions of materials being sheared. Proper material selection combined with optimized heat treatment maximizes blade service life.