S355厚规格钢板应变时效行为研究
发布时间：2019-07-24 11:43
【摘要】：对80 mm厚S355钢板进行应变时效冲击试验,从微观组织上对材料高应变时效敏感系数的原因进行了分析。结果表明:应变时效前后材料的组织未发生明显的改变,珠光体的含量较高,呈块状或球状,尺寸较小且分布较弥散。应变时效后,0~-60℃的冲击功均有一定程度的下降。在-20~-40℃具有较高的应变时效敏感性系数,高达70%以上。应变时效后位错密度大大增加。应变时效前位错分布均匀,应变时效后,位错缠结,位错的可动性大大降低,对材料的韧性造成很大的损害。时效温度附近出现的内耗峰是由于间隙C原子与位错钉扎和脱钉作用所致的结果。
[Abstract]:The strain aging impact test of 80 mm thick S355steel plate was carried out, and the reasons for the high strain aging sensitivity coefficient of the material were analyzed from the microstructure. The results show that the microstructure of the material does not change obviously before and after strain aging, the content of pearlite is high, it is bulk or spherical, the size is small and the distribution is dispersed. After strain aging, the impact work at 0 / 60 鈩，
本文编号：2518623
[Abstract]:The strain aging impact test of 80 mm thick S355steel plate was carried out, and the reasons for the high strain aging sensitivity coefficient of the material were analyzed from the microstructure. The results show that the microstructure of the material does not change obviously before and after strain aging, the content of pearlite is high, it is bulk or spherical, the size is small and the distribution is dispersed. After strain aging, the impact work at 0 / 60 鈩，
本文编号：2518623
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