The ageing impact toughness of the medium plate can be increased by controlling carbon and sulfur content and improving titanium content and the purity of the molten steel.
建议通过严格控制碳硫含量，提高钛含量和钢水纯净度，以提高钢板的时效冲击韧性。
2
We introduced a structure equation with macroscopic parameters, which can explain both the yield point phenomenon and strain-ageing of low carbon steels.
我们提出一种新的来自于宏观量构成的理论，将低碳钢的屈服及时效现象统一于同一个理论之下。
3
Two kinds of light-shield agents of ZnO and carbon black were used to improve the ageing-resistance of polyacetal(POM).