單項(xiàng)選擇題鐵素體在()以上具有磁性,而在該溫度下不具有磁性。

A.50℃
B.630℃
C.1150℃
D.770℃


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1.單項(xiàng)選擇題鐵素體在727℃時含碳量(C%)是()

A.C%=2.11%
B.C%=1.3%
C.C%=4.3%
D.C%=0.0218%

2.單項(xiàng)選擇題奧氏體在727℃時含碳量(C%)是()

A.C%=2.11%
B.C%=0.77%
C.C%=4.3%
D.C%=6.69%

3.單項(xiàng)選擇題奧氏體在1148℃時含碳量(C%)是()

A.C%=2.11%
B.C%=1.3%
C.C%=4.3%
D.C%=6.69%

4.單項(xiàng)選擇題萊氏體(Ld)的含碳量(C%)是()

A.C%=0.78%
B.C%=1.3%
C.C%=4.3%
D.C%=6.69%

5.單項(xiàng)選擇題珠光體(P)的含碳量(C%)是()

A.C%=0.78%
B.C%=0.77%
C.C%=4.3%
D.C%=6.69%