观察其显微组织和晶粒度，测定其显微硬度，分析了金相组织、晶粒度和硬度随固溶退火温度、保温时间、冷却速度的变化。
The microstructure was observed and the grain size and Vickers hardness were measured, the changes of microstructure, grain size, hardness and solid solution annealing process were discussed.
结果表明，退火态2224铝合金经e CAP挤压后，进行固溶和时效处理，明显提高了合金的力学性能，细化了合金的晶粒。
It is shown that the mechanical properties of annealed sample of 2224 aluminum alloy are improved by the combination of solid solution and aging treatment after ECAP, the size of grain is refined.
不锈钢薄壁焊管退火(固溶处理)是保证产品质量的关键工序，在实际生产中如操作和调整不当都会出现质量问题。
Annealing process is the key process to ensure the quality of stainless thick wall pipe. The improper operation and adjusting will induce the quality problem.
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