高温时效生成的片状相为低温时效时元素的迁移提供了路径，因此通过等级时效合金的磁性能得到提高；
The lamellae phase formed in high aging temperature provides channel for element diffusion in low aging temperature, so the magnetic properties increased during step aging process;
采用上述方式处理的模具经过低温时效后延迟了龟裂纹的出现，采用本发明的技术方案使模具的寿命大为延长。
The mold which is treated by adopting the way delays the emergence of craquelure after low-temperature aging, and by adopting the technical scheme, the service life of the mold is greatly prolonged.
对压铸铝合金进行低温时效，在最佳工艺条件下，合金的平均拉伸强度提高10 %以上，布氏硬度提高30 %以上。
Low temperature aging for die casting al alloy under appropriate technological condition can increase average strength and Brinell hardness more than 10% and 30% respectively.
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.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
时效处理：指让产品通过低温通风炉以释放淬火造成的应力的工艺。
AGING: the process of running product through low temperature air draw furnaces for the purpose of relieving stress which was caused in the hardening operation.
材料在自然时效与低温退火过程中，有沉淀强化效应产生，但导电率基本保持稳定。
There are precipitation strengthening effect during nature aging and low-temperature annealing, however, the conductivity remains stable basically.
在长期时效中，合金存在不同类型碳化物之间的转变，较低温度时向M _ (23) C_6型碳化物转变，较高温度时向MC型碳化物转变。
Different precipitation types of carbide in the alloy are transformed in long time aging treatment, turn to M_ (23) C_6 type at lower temperature and turn to MC type at higher temperature.
两个时效峰的硬度和强度相差很小，在较低温度下时效第二峰的强度、硬度、塑性、韧性较高。
At lower temperature, the strength, hardness, plasticity and ductility of the alloy at the second ageing peak are higher than those at the first one.
对室温和低温对欠时效态3J 21合金拉伸性能的影响进行了讨论。
The influence of temperature on the tensile properties of the under-aged 3j21 alloy was discussed.
结果表明：欠时效态3J 21合金的室温断口为韧窝断口，而低温断口呈现混合断裂特征。
It was found that the room-temperature fracture of the under-aged 3j21 alloy was of a dimple, while the low-temperature fracture assumed a mixed rupture feature.
研究了等温时效过程中试样长度的变化和低温预时效的影响。
The expansion behaviors during aging of the amorphous alloy were also studied.
研究了等温时效过程中试样长度的变化和低温预时效的影响。
The expansion behaviors during aging of the amorphous alloy were also studied.
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