高碳鉻滾動(dòng)軸承鋼的化學(xué)成分牌號標(biāo)準(zhǔn)化學(xué)成分（質(zhì)量分?jǐn)?shù)%）CSiMnCrMoNi≤Cu≤P≤S≤GCr4GB/T 18254-20020.95~1.050.15~0.300.15~0.300.35~0.50≤0.080.250.300.0250.020GCr150.95~1.050.15~0.350.25~0.451.04~1.65≤0.100.300.250.0250.025GCr15SiMn0.95~1.050.45~0.750.95~1.251.40~1.65≤0.100.300.250.025.0.025GCr15SiMo0.95~1.050.65~0.850.20~0.401.40~1.700.30~0.400.300.250.27~0.020GCr18Mo0.95~1.050.20~0.400.25~0.401.65~1.950.15~0.250.250.250.0250.020高碳鉻滾動(dòng)軸承鋼的力學(xué)性能GCr15室溫力學(xué)性能試樣狀態(tài)ób/MPaós/MPaó5(%)ψ(%)αk/MPaóbb/MPa硬度￠30mm退火6373872551.574198HBW￠17mm退火6083631858190~207HBW鍛料退火65317.355.969.6190~202HBW各種品種退火598~715372~41215~2525~4044170~207HBW900℃正火鍛材120040~42HRC冷軋9818831045300HBW淬火、回火狀態(tài)2155~25501665~1815680HV830℃淬火，150℃回火*2H1960830℃淬火，160℃回火*2.5H7.35~8.5861~65HRC斷裂韌度疲勞極限熱處理工藝洛氏硬度HRC斷裂韌度KIC/MPa*m1/2熱處理工藝HRCó-1/MPa循環(huán)次數(shù)/次真空熱處理59.4~59.918.95840℃油，160℃回火*2H63~647361.5*107空氣爐熱處理59.116.80空氣熱處理59.115.92GCr15SiMn室溫力學(xué)性能熱處理工藝ób/MPaó5(%)ψ(%)óbb/MPa硬度退火72112.757.0170~207HBW830℃淬火，500℃回火*2H142521.739HRC830℃淬火，180℃回火*1.5H272562HRC回火溫度對GCr15SiMn鋼接觸疲勞壽命的影響溫度/℃150180200250300350400疲勞壽命/H18.214.19.66.62.31.6GCr15SiMoGCr15SiMo鋼的接觸疲勞壽命熱處理工藝額定壽命L10/*107次中值壽命L50/*1腐蝕速度07次特征壽命V/*107次斜率860℃油淬，186℃回火2.5H1.13713.33814.11621.7494注：淬火、回火后的硬度為62.2~63HRCGCr15SiMo鋼的斷裂韌度組織熱處理工藝KIC/MPa*m1/2HRC貝氏體870℃淬火，230~240℃硝鹽*4H22.7560馬氏體860℃油淬，180℃*2H17.2362馬氏體840℃油淬，180℃*2H17.0861GCr18Mo力學(xué)性能狀態(tài)ób/MPaós/MPaó5(%)ψ(%)布氏硬度退火6673732760200HBW不同淬火加熱溫度下的力學(xué)性能試樣編號加熱溫度/℃硬度HRC沖擊韌度αk/(J/cm2)抗彎強(qiáng)度óbb/MPa斷裂韌度KIC/MPa*M1/2耐磨性/(W/mm3)185560.598.43321.720.60.02478286560.2111.63686.522.60.02395388059.8118.63831.722.00.02633GCr18Mo鋼不同等溫時(shí)間下的力學(xué)性能試樣編號等溫時(shí)間/H硬度HRC抗彎強(qiáng)度óbb/MPa斷裂韌度KIC/MPa*M1/2耐磨性/(W/mm3)11613360.1521.40.0239522603435.7523.10.0209534603686.522.60.02395GCr18Mo鋼不同等溫溫度和等溫時(shí)間下的力學(xué)性能試樣編號加熱溫度/℃硬度HRC沖擊韌度αk/(J/cm2)抗彎強(qiáng)度óbb/MPa斷裂韌度KIC/MPa*M1/2耐磨性/(W/mm3)122560.581.22982.1520.10.02297223560111.63686.522.60.02395324559.0128.83750.320.150.02495注：加熱溫度為865℃，等溫時(shí)間為4HGCr18Mo鋼接觸疲勞壽命序號顯微組織額定壽命L10/*106次中值壽命L50/*107次斜率α1貝氏體4.091.401.532貝氏體+馬氏體2.370.761.67斷裂韌度KIC牌號KIC/MPa*M1/2以GCr15的KIC為1.0的提高倍數(shù)GCr432.091.67GCr1519.161.0GCr4和GCr15鋼的接觸疲勞壽命牌號工藝L10/*107次以GCr15為1的倍數(shù)L50/*103次以GCr15為1的倍數(shù)斜率αGCr4預(yù)熱+加熱+噴水+淬火+回火5.311.262.211.191.33預(yù)熱+加熱+直接淬火+回火4.311.122.081.121.28GCr15常規(guī)淬火+回火4.211.01.811.01.27