花岗石平台（花岗石平板）经长期天然时效，组织结构均匀，线胀系数极小，内应力完全消失，不变形。

A granite platform (Granite Flat Panel) was a long-term natural aging, organizational structure, uniform, linear expansion coefficient is extremely small, internal stress disappear, not deformed.

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舞钢研制开发的调质钢wh80 Q具有高强度、良好的低温冲击韧性、抗层状撕裂性能、较低的时效敏感性系数。

The quenched and tempered steel WH80Q offers high strength, excellent low temperature impact toughness, lamellar tearing resistance and lower aging sensitivity factor.

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经过时效处理接头强度系数提高到72.5%。

After aging treatments, the strength coefficient reached 72.5%.

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