It is very difficult by heattreatment to improve the precipitation character of carbide and reduce their brittle effect.
利用热处理手段来改善碳化物的析出特征，大幅度降低其脆化效果还较为困难。
2
Therefere it is considered that in the si crystals adopted and the heattreatment used in the experiment, the homogeneous nucleation may be the leading form of the oxygen precipitation.
因此认为，对所采用的硅单晶在具体工艺条件下，氧沉淀是以均匀成核为主。
3
These precipitation-hardened aluminum alloys gain their high strengths through heattreatment involving a severe quenching operation, which introduces a very high level of residual stresses.