超塑性变形的微观机制是以晶界滑动为主，晶内变形以及位错蠕变起了协调作用。
The principal superplastic deformation mechanism for the alloy is boundary sliding, assistant ones are deformations inside the grains and dislocations creep.
合金在超塑变形中，位错滑移起重要协调作用，使晶界滑动易于进行。
In the process of superplastic deformation, the dislocation sliding has important cordinating effect, so that the grain boundary sliding proceeds easily.
蠕变期间，晶内碳化物阻碍位错运动，晶界碳化物“钉扎”晶界，阻碍晶界滑动，由此提高钢的蠕变抗力。
The carbides in the matrix prevent dislocation from moving, and pin effect of the carbides in the grain boundary keep grain boundary from sliding, and creep resistance of steel is improved.
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