H13钢高温压缩过程中温升对其变形行为及组织的影响
发布时间:2018-11-18 07:53
【摘要】:根据热锻工艺温度-时间特征,利用Gleeble-3800热模拟试验机对H13钢进行高温压缩试验,在变形温度为800~1 100℃,变形速率为0.1~10s-1条件下获得真应力-真应变曲线。试验结果表明:压缩过程中,外力做功会导致样品温度升高,温升幅度随变形速率的增加而增大,在较低温度下变形时温升更为显著,这部分温升有利于促进动态再结晶的软化过程。由此导致900℃以下变形的试样在更小应变下就可发生再结晶,其峰值应力不会随变形速率升高而增大,甚至略微降低,呈现出较好塑性。相同变形温度下,变形后的晶粒尺寸随温升幅度的增加而增大。
[Abstract]:According to the temperature-time characteristics of hot forging process, the high temperature compression test of H13 steel was carried out by using Gleeble-3800 thermal simulator. The true stress-true strain curve was obtained under the condition of 800 鈩,
本文编号:2339369
[Abstract]:According to the temperature-time characteristics of hot forging process, the high temperature compression test of H13 steel was carried out by using Gleeble-3800 thermal simulator. The true stress-true strain curve was obtained under the condition of 800 鈩,
本文编号:2339369
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