Material Performance Map: Steels → Cemented Carbides & Ceramics → Rubbers → Lubricants → Performance Correlation Chart → Four Steps for Material Selection.
I. Steels: Material Composition + Heat Treatment Determine Four Key Performance Characteristics
Steels (Fasteners/Cutting Tools/Liners/Chains): Carbon Steel (Q235—moderate strength, poor wear resistance, used only for non-critical parts; 45 Steel—strength and toughness improved via quenching and tempering, used for general-purpose parts);
Alloy Steel (40Cr/42CrMo—excellent strength and toughness, wear resistance enhanced by heat treatment, the standard choice for high-strength bolts of grades 8.8–12.9); Stainless Steel (304/316—prioritizes corrosion resistance, lower strength than alloy steel, used in humid or corrosive environments); Bearing Steel (GCr15/100Cr6—high hardness and wear resistance, specialized for bearings); Cemented Carbide (WC+Co—hardness >HRA90, core material for wear-resistant cutting tools)—Material composition and heat treatment jointly determine four performance characteristics: hardness, toughness, wear resistance, and corrosion resistance (e.g., for the same 45 steel, strength differs twofold depending on whether quenching and tempering are applied—an industry standard fact).
II. Cemented Carbide vs. Ceramics: Division of Roles Based on Wear and Temperature Resistance
Cemented carbide and ceramics (cutting tools/wear parts/seals): Cemented carbide (WC-Co—balances hardness, wear resistance, and toughness; the top choice for CNC inserts and wear parts); Cermets (TiC-based—high-temperature and oxidation resistance; for high-speed finishing); Alumina ceramics (Al2O3—corrosion, wear, and high-temperature resistance, but brittle; used for pipe liners/seal rings); Zirconia ceramics (ZrO2—superior toughness compared to alumina, thermal shock resistance; for precision ceramic components); Silicon carbide (SiC—ultra-hard and wear-resistant; for pump seals/heat exchangers)—Core logic for wear-resistant applications: high hardness implies wear resistance, but pure hardness leads to brittleness; cemented carbide and zirconia strike a balance between hardness and toughness (industry consensus).
III.
Rubber and Oil Products: Wrong Seal = Leakage; Wrong Oil = Wear
Rubber products (seals/conveyor belts/hoses): NBR (Nitrile Rubber)—oil and wear resistance, general-purpose hydraulic seals (first choice for oil seals); EPDM (Ethylene Propylene Diene Monomer)—ozone, weather, and water resistance, seals for doors, windows, and water pipes; FKM (Fluoroelastomer)—high-temperature resistance (200°C+) and chemical resistance, high-end seals (cylinder head gaskets/chemical processing seals); Silicone rubber—temperature range of -60°C to 250°C, electrical insulation, O-rings for electronics; Polyurethane (PU)—high wear resistance and strength, seals/screens/rubber rollers—Choosing the wrong sealing material leads to leakage (selecting NBR for oil resistance and FKM for high-temperature resistance is basic common knowledge).
Lubricants (hydraulic oil/gear oil/cutting fluid): Base oil (mineral oil/synthetic oil [PAO or esters]) + additives (anti-wear, anti-rust, anti-foaming, extreme pressure). Synthetic oils offer superior temperature and oxidation resistance compared to mineral oils (extending oil change intervals by 2–3 times). Viscosity grade (ISO VG) determines fluidity (e.g., VG46 = 46 cSt at 40°C); selecting the wrong viscosity leads to inadequate lubrication or excessive resistance, accelerating equipment wear.
IV.
Performance Correlation Table and Four Steps for Material Selection
Performance correlation table: Hardness—cemented carbide/bearing steel + heat treatment; Wear resistance—cemented carbide/wear-resistant steel/alumina ceramics; Corrosion resistance—stainless steel/ceramics/FKM (fluororubber); Temperature resistance—FKM/ceramics/synthetic oil/silicone rubber; Toughness—alloy steel/rubber/zirconia; Strength—alloy steel/high-strength bolts (grades 8.8, 10.9, 12.9); Electrical conductivity/insulation—silicone rubber (insulation)/copper or aluminum (conductivity). Note: Different materials within the same category yield different performance levels (e.g., 40Cr bolts vs. 304 bolts differ in strength, corrosion resistance, and application scenarios).
Four steps for material selection: First, define requirements based on operating conditions—fully list the four key parameters: load, temperature, medium (oil/acid/alkali), and abrasive agents (quartz sand/dust). Second, select the material based on performance needs—wear resistance (cemented carbide/wear-resistant steel), corrosion resistance (stainless steel/ceramic/FKM), oil resistance (NBR), high-temperature resistance (FKM/ceramic), and high strength (Grade 12.9 alloy steel). Third, check standard grades—cross-reference GB/T grades with ISO/EN standards (e.g., 40Cr=41Cr4, GCr15=100Cr6, 304=1.4301) to avoid purchasing errors. Fourth, verify via trial orders—measure service life under actual operating conditions (a trial order reveals whether the material is correct).
V. Summary: Material Determines the Performance Ceiling
Core Conclusion: How does the material of industrial consumables affect performance? The material determines the performance ceiling (an industry consensus): steel grades determine strength, hardness, and wear resistance; cemented carbide/ceramics determine wear and temperature resistance; rubber materials determine resistance to oil, temperature, and chemicals; and the base oil determines temperature resistance and oil change intervals.
Choosing the right material ensures performance standards are met, while the wrong material can cut service life in half. Practical mnemonic: First, define requirements by operating conditions (load/temperature/medium/abrasives); second, select materials based on performance (wear-resistant carbide, corrosion-resistant stainless steel/ceramic, oil-resistant NBR, high-temp FKM); third, cross-reference standard grades (e.g., 40Cr=41Cr4, GCr15=100Cr6 to avoid mistakes);
fourth, verify via trial orders (actual service life under real conditions is the ultimate test)—get the material selection right, and you save half the cost of industrial consumables (doubling service life effectively halves the cost).
