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.
通过对新型铝合金时效处理后的组织结构进行分析，研究了不同的时效温度和时间对该铝合金力学性能的影响。
The effect of aging temperature and aging time to new-type heat-resisting aluminum alloy forging structure and properties are introduced.
本文研究了不同热处理时效温度和时效时间对一种活塞环用钴基高温合金的抗拉强度、延伸率、硬度及组织的影响。
The effect of aging treatment on the tensile strength, elongation, hardness and microstructure of a cobalt base superalloy used for pistons rings was investigated in this paper.
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