【摘要】：汽車和家電行業(yè)對高品質(zhì)大截面塑料模具鋼的需求量逐漸增大,但隨著塑料模具鋼截面厚度的增大,其出現(xiàn)粗晶的可能性也增大,這使得合理的熱處理工藝設(shè)計顯得尤為重要。通過添加鈦來抑制高溫處理過程中奧氏體晶粒的長大行為,并著重研究微合金鈦元素對非調(diào)質(zhì)塑料模具鋼奧氏體晶粒長大的影響規(guī)律。研究發(fā)現(xiàn),含0.03%鈦的非調(diào)質(zhì)塑料模具鋼在均質(zhì)化溫度高于1 050℃時具有較好的抗晶粒粗化能力,原因是組織中晶界附近存在一定量的以Ti(C,N)為主的析出相。通過以上研究建立了奧氏體晶粒長大模型,該模型可有效預(yù)測非調(diào)質(zhì)塑料模具鋼高溫均質(zhì)化過程中的奧氏體晶粒長大規(guī)律。
[Abstract]:The demand for high quality and large section plastic die steel in automobile and household electrical appliance industry increases gradually, but with the increase of cross section thickness of plastic die steel, the possibility of coarse-grained plastic die steel also increases, which makes reasonable heat treatment process design especially important. The austenite grain growth behavior during high temperature treatment was inhibited by adding titanium, and the effect of microalloyed titanium element on austenite grain growth of non-quenched plastic die steel was studied. It is found that the non-quenched plastic die steel containing 0.03% titanium has a good resistance to grain coarsening when the homogenization temperature is higher than 1050 鈩，

本文編號：2170845