Cementite is much harder but more brittle than ferrite._精华吧

Cementite is much harder but more brittle than ferrite.

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Cementite is much harder but more brittle than ferrite.

A.正确

B.错误

正确答案：正确

Tag：材料导论时间：2022-01-28 20:08:31

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相关答案

1.In the iron-carbide phase diagram, when at the temperatures above the eutectoid and for all times, only austenite will exist.
2.Temperature plays an important role in the rate of the austenite-to-pearlite transformation.
3.The first process to accompany a phase transformation is nucleation.
4.δ-ferrite is stable only at relatively high temperatures.
5.In practice, not all steels and case irons have carbon contents less than 6.7 wt% C.
6.α iron has a BCC crystal structure.
7.Of all binary alloy systems, the one that is possibly the most important is that for iron and carbon.
8.For all temperatures and compositions below the melting temperature of the lowest melting component, only a single solid phase will exist.
9.We don’t have to employ the tie line if two phases are present.
10.From the previous example for the 60 wt%Ni-40 wt% Cu alloy at 1100℃, only the α phase is present.

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