But Nb adding increases the under-heating austenite stability, reduces the temperature of phase transformation point and postpones the transformation of pearlite.
而铌元素的加入增大了过冷奥氏体的稳定性，相变点温度降低，并且推迟珠光体的转变。
2
The pitch is 105 x 68 metres and has an automated sprinkler system and under-soil heating. The current normal capacity is 63,000.
场地长105米，宽68米，拥有自动洒水系统和地底加热系统，目前能容纳63000人。
3
The thermal protection mechanism of three layer for coating material underheating process was discussed, the conservation equations which reflects difference function was established.