首页 金属材料的疲劳极限 常用国产机械材料缺口试样(缺口半径R=0.75mm)旋转弯曲p-S-N曲线的ap和bp值

常用国产机械材料缺口试样(缺口半径R=0.75mm)旋转弯曲p-S-N曲线的ap和bp值

材料 热处理 σb/MPa ασ 不同存活率下的ap、bp
p/% 50 90 95 99 99.9
Q235A 热轧 439 2 ap 22.6342 21.4857 21.1602 20.5505 19.8662
bp -7.4382 -6.9652 -6.8311 -6.58 -6.2982
Q235A(F) 热轧 428 2 ap 20.1179 19.403 19.2005 18.8206 18.3918
bp -6.3651 -6.1311 -6.0649 -5.9406 -5.8
Q235B 热轧 441 2 ap 22.01 21.09 20.83 20.36 19.79
bp -6.997 -6.65 -6.559 -6.389 -6.177
20 正火 463 2 ap 21.7179 21.158 20.9272 20.4437 19.9285
bp -6.9947 -6.7951 -6.706 -6.514 -6.305
35 正火 593 2 ap 21.7192 19.9807 20.0532 20.6044 21.5711
bp -6.9755 -6.2757 -6.3147 -6.5635 -6.9915
45 正火 624 2 ap 21.9613 19.9807 20.0532 20.6044 21.5711
bp -6.9755 -6.2757 -6.3147 -6.5635 -6.9915
45 调质 735 2 ap 21.9655 19.0476 18.2225
bp -6.8622 -5.7259 -5.4046
45 电渣熔铸 934 2 ap 22.2483 21.4464 21.2194 20.7935 20.3158
bp -6.6953 -6.4245 -6.3479 -6.2042 -6.0427
50 正火 661 2 ap 21.7608 19.6916 19.2883 18.5291 17.6782
bp -6.7497 -5.9828 -5.8388 -5.5677 -5.264
55 调质 834 2 ap 22.9095 20.5455 20.1084 19.6624 19.5636
bp -7.1262 -6.2402 -6.076 -5.9129 -5.8812
Q345 热轧 586 2 ap 24.0589 21.707 21.0411 19.7921 18.3904
bp -7.8056 -6.8701 -6.6052 -6.1084 -5.5508
40MnB 调质 970 2 ap 24.2924 22.3902 21.9595 21.5391 21.3448
bp -7.4986 -6.7748 -6.6433 -6.5068 -6.4678
18Cr2Ni4W 调质 1039 2 ap 27.4174 25.2014 24.5739 23.3958 22.0746
bp -8.5824 -7.7674 -7.5368 -7.1036 -6.6178
20Cr2Ni4A 淬火后低温回火 1483 1.89 ap 24.989 23.6921 23.3243 22.6368 21.8642
bp -7.413 -6.9978 -6.88 -6.6599 -6.4126
20CrMnSi 调质 788 2 ap 31.3928 30.9739 30.854 30.6312 29.0707
bp -10.2412 -10.1507 -10.1246 -10.0764 -9.4976
35CrMo 调质 924 2 ap 18.8759 16.3897 14.916
bp -5.4657 -4.5378 -3.9648
40Cr 调质 940 2 ap 23.8399 19.9848 19.9021 20.5717
bp -7.3301 -5.922 -5.9238 -6.2543
40CrMnMo 调质 977 2 ap 22.3333 18.9279 17.9639 16.1632 14.108
bp -6.7964 -5.5385 -5.1824 -4.5177 -3.7573
40CrNiMo 调质 972 2 ap 24.4941 20.8809 20.3812 18.8271 17.3918
bp -7.3853 -6.0584 -5.7816 -5.3022 -4.7731
42CrMo 调质 1134 2 ap 25.5155 22.3251 21.997 21.8787 22.1552
bp -7.8989 -6.7029 -6.5814 -6.5417 -6.6521
50CrV 淬火后中温回火 1586 2 ap 35.6905 33.943 33.4481 32.5198 31.4781
bp -11.6069 -10.9504 -10.7636 -10.415 -10.0235
55Si2Mn 淬火后中温回火 1866 1.89 ap 34.8106 31.7982 30.9444 29.343
bp -10.7339 -9.7156 -9.4269 -8.8855
60Si2Mn 淬火后中温回火 1625 1.89 ap 38.3265
bp -12.5501
65Mn 淬火后中温回火 1687 2 ap 34.9623 31.3483 30.325 28.4052 26.2516
bp -10.9421 -9.6725 -9.3126 -8.6374 -7.8797
16MnCr5 淬火后低温回火 1373 1.89 ap 25.2408 23.9648 23.6046 22.9274 22.1661
bp -7.5962 -7.1731 -7.0537 -6.8292 -6.5767
20MnCr5 淬火后低温回火 1482 1.89 ap 23.3315 20.8643 20.1655 18.8471 17.3829
bp -6.803 -5.9492 -5.7074 -5.2452 -4.7443
1Cr13 调质 721 2 ap 21.1863 19.9575 19.6065 18.9568 18.2244
bp -6.483 -6.0205 -5.8893 -5.6437 -5.3677
2Cr13 调质 687.5 2 ap 24.7427 19.3938
bp -7.9129 -5.8206
ZG1Cr13 退火后正火 789 2 ap 21.4794 19.8246 19.355 18.4757 17.4893
bp -6.5322 -5.9426 -5.7751 -5.4619 -5.1105
ZG20SiMn 正火 515 2 ap 22.1144 21.6379 21.5022 21.2491 20.9661
bp -7.1378 -6.9588 -6.9078 -6.8128 -6.7065
ZG230-450 正火 543 2 ap 19.14 18.32 -18.09 17.66
bp -5.84 -5.56 -5.48 -5.34
ZG40Cr 调质 977 2 ap 33.146 30.8377 30.1677 28.9926 27.5794
bp -10.9713 -10.1611 -9.9252 -9.5152 -9.0174

QT400-18

(梅花试样)

退火 472 2 ap 29.1913 28.019 27.6871 27.0644 26.3657
bp -10.0481 -9.6066 -9.4817 -9.2471 -8.9841

QT400-18

(楔形试块)

退火 432 2 ap 26.5304 23.3493 22.4507 20.7622 18.8677
bp -8.9732 -7.7067 -7.348 -6.6754 -5.9207

QT600-3

(梅花试块)

正火 760 2 ap 21.7317 19.228 19.1067 19.0527 19.0774
bp -6.9693 -5.9658 -5.9252 -5.9186 -5.942

QT600-3

(楔形试块)

正火 858 2 ap 22.675 18.8598 18.2743 17.7857 17.7081
bp -7.2665 -5.7648 -5.5331 -5.3413 -5.3128
QT700-2 正火 754 2 ap 19.4801 19.1196 19.017 18.8255 18.6111
bp -6.1108 -6.0413 -6.0214 -5.9845 -5.9432
QT800-2 正火 842 2 ap 22.5876 21.8004 21.67
bp -7.2043 -6.9513 -6.9173

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