【摘要】：對AerMet100超高強度鋼淬火后深冷處理,然后在不同溫度下回火,利用OM,SEM,TEM對處理后的組織進行觀察。采用分離式Hopkinson壓桿研究不同熱處理工藝對其動態(tài)力學性能的影響規(guī)律。結(jié)果表明:深冷處理可降低殘余奧氏體的含量,提高材料的動態(tài)塑性,改善材料的綜合性能;在高應變率(1000~4200s~(-1))下,與準靜態(tài)相比,材料表現(xiàn)出明顯的應變率硬化效應。隨著回火溫度的升高,材料的動態(tài)壓縮強度呈現(xiàn)出先升高后降低的趨勢,在482℃時出現(xiàn)峰值,約為2800MPa。在動態(tài)加載條件下,材料的斷裂形式均是剪切斷裂。
[Abstract]:The microstructure of AerMet100 ultrahigh strength steel was observed by OM,SEM,TEM after quenching and then tempering at different temperatures. The effect of different heat treatment processes on the dynamic mechanical properties of split Hopkinson compression bar was studied. The results show that cryogenic treatment can reduce the content of retained austenite, improve the dynamic plasticity of the material and improve the comprehensive properties of the material. At high strain rate (1000 ~ (-1) / 4200s ~ (-1), the strain rate hardening effect of the material is obvious compared with that of quasi static state. With the increase of tempering temperature, the dynamic compressive strength of the material increased first and then decreased, and reached a peak value of about 2800MPa at 482 鈩，

本文編號：2339072