火力发电厂几种新型耐热钢的化学成分金相组织和机械性能

1、火力发电厂几种新型耐热钢的化学成分金相组织和机械性能表1 各种材料的化学成分钢号及成分WB36T23T24T91T92TP304HTP347HT122SUP304HTP347HFGHR3CNF709C0.170.04-0.100.05-0.100.08-0.120.07-0.130.04-0.100.04-0.100.07-0.140.07-0.130.04-0.100.04-0.100.04-0.12Si0.25-0.500.500.15-0.450.20-0.500.500.751.000.500.301.000.751.00Mn0.80-1.200.10-0.600.30-0.700.3

2、0-0.600.30-0.602.002.000.701.002.002.001.50S0.020.010.010.010.010.030.030.010.010.030.030.01P0.0250.030.020.020.020.040.040.020.040.040.030.03Cr0.301.90-2.602.2-2.68.00-9.508.50-9.5018.0-20.017.0-20.010.0-12.517.0-19.017.0-20.024.0-26.018.0-22.0Mo0.25-0.500.05-0.300.90-1.100.85-1.050.30-0.600.25-0.6

3、01.00-2.00W1.45-1.751.50-2.001.50-2.50V0.20-0.300.20-0.300.18-0.250.15-0.250.15-0.30Nb.015-0.0450.08-0.200.06-0.100.04-0.09注10.04-0.100.30-0.60注10.20-0.60注20.10-0.40Ni1.00-1.300.400.408.00-11.09.00-13.000.507.50-10.509.00-13.0017.0-23.022.0-28.0Cu0.50-0.80Ti=0.05-0.100.30-1.702.5-3.52.5-3.5N0.0300.0

4、120.03-0.070.03-0.0700.04-0.100.05-0.120.15-0.350.05-0.20Al0.050.0300.020.040.040.040Ti=0.02-0.20B0.0005-0.0060.0015-0.0070.001-0.0060.0005-0.0050.002-0.010表2 各种材料的金相组织钢号WB36T24T91T92TP304HTP347HTP347HFGT23T122SUP304HHR3CNF709组织贝氏体+少量铁素体回火贝氏体回火索氏体回火马氏体奥氏体奥氏体奥氏体回火贝氏体回火马氏体奥氏体奥氏体奥氏体表3 各种材料的力学性能钢号性能WB36

5、T24T91T92TP304HTP347HTP347HFGT23T122SUP304HHR3CNF709s440450415440205205205400400205295313b610-780580585620515515550510620550655637(%)192020203535352020353030未注明者均为最小值表4 各种钢管的许用应力钢号WB36T24T91T92TP304HTP347HTP347HFGT23T122SUP304HHR3CNF709规定温度许用应力510500时的许用应力约为46MPa115.1107132.39991.3122.6133.685.1116.

6、153811199126.1979990.298.5127.584114.4127.956677.289118.5829689.677.1115.782.7112.6121.159346.27193.7689388.257.988.981.3110.9116.162138.64870.35573.586.837.964.180.693.7111.66493047.5425466.89.642.778.569.691.867750.359.952.471.9704263037.244.839.356.973227.532.429.643.2表5 钢管的使用温度上限和推荐应用的部件 钢种使用温度上限推荐应用部件T24580过热器、再热器或水冷壁P24550集箱、蒸汽管道T23600过热器、再热器或水冷壁P23575集箱、蒸汽管道T91625过热器、再热器P91600集箱、蒸汽管