用TEM 观察了共析珠光体钢经真应变为2.89的拉拔变形以及不同温度时效后微观组织变化，并测量了不同时效温度后的力学性能。结果表明，大变形珠光体钢在473K时效后获得相对于时效前更高的抗拉强度，在673K时效获得较均衡的强韧性能。组织观察发现，大变形中溶解的渗碳体在时效过程中弥散析出，分析认为碳化物的析出阻碍位错移动，使得宏观抗力增加，提高了该钢的力学性能。
The aging of a drawn eutectoid carbon steel with true strain 2.89 at different temperatures has been studied by means of TEM and electrical resistance measurement. The results indicated that the aging at 473K for 1hr improved the tensile strengths from 2245.65MPa of as-drawn to 2448.52MPa. Better mechanical property with combination of strength and ductility was observed after aging at 673K for 1h. Further increase of aging temperatures deteriorated the property possibly due to the recrystalization. The underlying mechanism of the better mechanical properties after aging at low temperature (673K) is considered to associate with the precipitation of fine carbide dissociated in the drawing.
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