(上海交通大學 金屬基復合材料國家重點實驗室，上海 200030)
摘 要: 以微屈服強度、應力松弛強度及線性尺寸測量值為指標，研究了多種熱處理對SiCp/2024Al復合材料尺寸穩(wěn)定性的影響。結果表明，在不同使用環(huán)境條件下，應作不同的尺寸穩(wěn)定化處理。峰時效處理能提高材料抵抗負載尺寸穩(wěn)定性，冷熱循環(huán)處理則對抵抗環(huán)境溫度變化尺寸穩(wěn)定性有利，而退火、深冷處理的尺寸穩(wěn)定性較低。分析了影響該復合材料尺寸穩(wěn)定性的微觀結構因素。
關鍵字: SiCp/2024Al；尺寸穩(wěn)定性；微屈服強度；熱處理
（State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200030, P.R.China）
Abstract:In terms of microyield strength, stress relaxation strength and linear dimension measuring, the effects of various heat treatments on dimensional stability of a SiCp/2024Al composite material have been studied. The dimensional stability of the composite resisting foreign load could be improved by peak aging treatment, and the thermal cycling treatment was beneficial to the dimensional stability under the condition of large change of ambient temperature. Annealing and deep cooling treatments have no satisfying effect on the dimensional stability. Finally the influential factors of the dimensional stability were discussed.
Key words: SiCp/2024Al; dimensional stability; microyield strength; heat treatment
