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feilipu189金蟲(chóng) (正式寫(xiě)手)
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[交流]
【請(qǐng)教】【請(qǐng)教】AMS5663中一段話(huà)的理解
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precipitation heat treatment:heat to a temperature within the range 1325 to 1400F,hold at the selected temperature for approximately 8 hours,cool at 100F degrees per hour to a temperature with the range 1150 to 1200F,hold at the selected temperature for approximately 8 hours and air cool.Istead of the 100 F degrees per hour cooling rate to 1150 to 1200 F,the product may be furnace cooled at rate provided the time at 1150 to 1200F is adujsted to give a total preciptation heat treatment time of approximately 18 hours. 請(qǐng)教各位,第二種方法的18小時(shí)中,降溫的那段時(shí)間是不是可以多到10個(gè)小時(shí),還是只能是2個(gè)小時(shí)左右. |
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