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Chinese Standard: GB/T 13320-2007

Metellographic grading atlas and assessing method for steel die forgings

全国锻压标准化技术委员会

本标准规定了钢质模锻件的金相组织评级图(以下简称评级图)及评定方法。
本标准适用于经过调质处理、正火处理、等温正火处理、锻后控冷处理的结构钢模锻件。
本标准不适用于对锻件脱碳、过热、过烧等组织的评定。

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