Generally the microstructure of the overheated forging can be improved by means of high temperature fast cooling normalizing so that the qualified level from NADCA and ASTM standards can be obtained.
而一般过热的锻材可通过高温快冷正火处理来改善其显微组织，从而获得NADCA (ASTM)标准的合格级别组织。
Generally the microstructure of the overheated forging can be improved by means of high temperature fast cooling normalizing so that the qualified level from NADCA and ASTM standards can be obtained.
而一般过热的锻材可通过高温快冷正火处理来改善其显微组织，从而获得NADCA (ASTM)标准的合格级别组织。
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