金属热物性参数

表1 各种金属的热物性值金 属温 度 C比 热cal/(gC)导热系数cal/(cmsC)密度r(g/cm3)液相线、固相线温度(C)纯 铁25200400769800100015000.1070.1240.1450.3580.2300.1480.1800.1920.1520.1200.0740.0710.0700.032r=7.88(20C) =7.3(1500C) =7.0(1600C)镇静钢(C0.08%)020040080012000.1120.1240.1420.2300.1580.1420.1280.1070.0680.071r=7.86(15C)软 钢(C0.23%)020040080012000.1120.1240.1420.2280.1580.1240.1160.1020.0620.071r=7.86(15C)碳素结构钢(S35C)252004008000.1110.1250.1340.2850.1030.0950.0790.078中碳钢(C0.4%)020040080012000.1120.1220.1400.1480.1560.1240.1150.1000.0590.071r=7.85(15C)共析钢(C0.8%)020040080012000.1080.1280.1440.1460.1600.1190.1080.0910.0580.072r=7.85(15C)工具钢(C1.2%)020040080012000.1080.1300.1420.1560.1560.1030.1020.0890.0570.068r=7.83(15C)续表1 各种金属的热物性值金 属温 度 C 比 热cal/(gC)导热系数cal/(cmsC)密度r(g/cm3)液相线、固相线温度(C)Si2%钢020040080012000.1200.1260.1440.3260.1600.0600.0720.0740.0600.070r=7.73(15C)Ts=1488TL=1497Cr1%钢2020040080012000.1140.1240.1420.2060.1460.1060.0920.0620.072r=7.84(15C)TS=1420TL=1520不锈钢(AISI 420)2020040080012000.1140.1190.1460.2140.1360.0530.0550.0580.0640.069r=7.7(15C)13.1Cr,0.5NiTS=1399TL=1454不锈钢(AISI 304)020040080012000.1180.1280.1360.1540.1600.0350.0430.0500.0630.0761820Cr,812NiTS=1399TL=1454过共晶灰口铸铁20200400800900（0.128）（0.134）（0.140）（0.168）（0.173）0.1540.1240.0940.0710.053r=7.0(15C)比热相对于普通铸铁共晶灰口铸铁2020040080012000.1860.1410.1040.0700.036球墨铸铁2020040080010000.1190.1010.0870.0720.0510.041r=7.1(15C)金 属温 度 C比 热cal/(gC)导热系数cal/(cmsC)密度r(g/cm3)液相线、固相线温度(C)白口铸铁2020040080012000.0450.0510.0530.0470.048r=7.57.8(15C)纯铜20200600100012000.0920.0930.1060.1150.9560.9310.8740.803r=8.92TS=TL=1083Cu90%Al10%2020060010000.1050.1110.1240.1360.1220.1560.2330.310TS=1030TL=1042Cu70%Zn30%202006009000.0940.1000.1130.1230.2670.3490.3590.367TS=915TL=955 Cu60%Zn40%202006009000.0920.0970.1080.1160.3020.3460.3610.334TS=900TL=905Cu70%Ni30%2020060010000.0930.1010.1120.1230.0690.0880.1300.172TS=1170TL=1240Cu60%Ni40%20200600100012000.1010.1050.1150.1250.1300.0560.0740.1130.1520.172TS=1227TL=1280纯铝202005006600.2150.2350.2680.2860.5650.5700.5290.508rs=2.70(15C)TS=TM=660.2Al-Cu4.5%202005000.2100.2290.2610.4490.4490.461TS=502TL=638金 属温 度 C 比 热cal/(gC)导热系数cal/(cmsC)密度r(g/cm3)液相线、固相线温度(C)AlMg8%202004005000.2180.2380.2600.2710.1990.2860.3820.431TS=540TL=625纯镁202004006500.2460.2630.2880.3250.3730.3620.3530.346rs=1.74TL=TS=651Mg94.7Zn4.6 Zr0.7(相当于MC6)202004005490.2420.2640.3030.3410.2610.2960.3190.324TS=549TL=641Mg90.2Al9Zn0.6Mn0.2(相当于MC2)202004004680.2350.2610.2910.3000.0510.0560.0620.063TS=468TL=616Inconel X(73Ni,15Cr,7Fe,2.5Ti,1Nb)2020060010000.1030.1150.1330.1970.0280.0350.0520.069rs=6.09TS=1395TL=1427耐盐酸镍基合金C600100012000.1260.1530.1670.0460.0700.074TS=1270TL=1305表2 铸型的热物性计算公式No视在物性值计算公式备注1浇注合金：铸铁硅砂干型，呋喃铸型2浇注合金：铸铝硅砂干砂，呋喃铸型3浇注合金：铸钢硅砂干型4浇注合金：铸钢硅砂呋喃铸型5硅砂6橄榄石砂7锆砂8铬砂9硅砂，干型，呋喃铸型600C以下0.385e0.4940.0058DP0.03790.03W0.08 0.056 0.024 0.014 0.014铸钢/砂型(难以产生空隙时)15 300 420 600 1200 1800 0.022 0.014 0.011 0.0084 0.0055同上(容易产生空隙时)表9 合金的密度、潜热合金rs(20C)(kg/m3)rs(Ts)(kg/m3)L(kJ/kg)1%Cr钢7840-2771.5%Mn钢7850-2772%Si钢7730-333奥氏体不锈钢77007000294铁素体不锈钢8000-3040.08%C钢780070300.23%C钢786070300.80%C钢785069901.20%C钢78306900白口铸铁7650(7000)灰口铸铁7100(6650)Al-4.5%Cu2980(2630)-Al Si 7Mg2680(2360)-Cu-30Zn8390(7520)-Mg-3Al-1Zn-5Mn1850(1690)370Ni-15Cr-7Fe-2.5Ti-Hb-0.9Al-0.7Mn-0.4Si-0.0406087(5400)表10单位换算表 量SI制CGS制工程制，MKH制密 度kg/m3g/cm3kg/m31100010-3111000力Ndynkgf19.806651059.806651051/9.806651压 力Padyn/cm2kgf/cm210.0980665106100.9806651061.0197210-61热 量Jcalkcal14.186050.23888910.23888910-310-3比 热kJ/(kg.K)cal/(g.C)kcal/(kg.C)14.186050.23888910.2388891比 热 流 量W/m2cal/(cm2.s)kcal/(m2.h)14.186051042.3888910-510.863.6104导 热 系 数W/(m.K)cal/(cm.s.C)kcal/(m.hC)1418.6052.3888910-310.863.6