18Cr2NI4WA вал ковки заготовки

Grade:18Cr2Ni4WA shaft forging blanks Standard:GB/T3077-1999 :CHENMICAL COMPOSITION substanceCSIMNSPCRNICUW0.13～0.190.17～0.370.30～0.60≤0.025≤0.0251.35～1.654.00～4.50 ≤0.0250.80～1.20 MECHANICAL PROPERTIES TENSIBLE STRENGTHσb (MPa)≥1175(120) YIELD STRENGTHσs (MPa)≥835(85) ELONGATIONδ5 (％)≥10 REDUCTION OF CROSS SECTIONAL AREA ψ (％)≥45 POWER RUSHAkv (J)≥78 IMPACT FLEXIBILITYαkv (J/cm2)≥98(10) HARDNESS≤269HB MODEL MEASUREMENTTESTING SAMPLE BLANK DIMENSIONS15mm HEAT TREATMENT AND METALLURGICAL STRUCTURE HEAT TREATMENT QUENCHING 950°C AT FIRST,THEN 850°C AIR COOLING,tempering200°C water and air cooling。 DELIVERY HEAT TREATMENT SUCH AS NORMALIZING,annealing,tempering at hight temperature or not.The delivery condition should be made out in the contract. APPLICATION Alloy structural steel,Good processing performance,small distortion,fatigue-resistance which is Used as the component part of shaft and kolbenteil and auto,plane