由图片可以看出,回火后试验钢中析出量大量的细小碳化物,随着回火温度的升高,碳化物数量逐渐增多,到600℃时析出大量细小碳化物,部分碳化物被粗化。
It can be seen from the picture that a large number of fine carbides precipitated in the test steel after tempering. With the increase of tempering temperature, the number of carbides gradually increased. At 600℃, a large number of fine carbides were precipitated, and some carbides were coarsened. change.