燕山大学学报Issue(6)：480-486,7.DOI:10.3969/j.issn.1007-791X.2013.06.002
大型锻件微孔隙氢压场研究
Research on hydrogen pressure field of micropores in heavy forgings
摘要
Abstract
A micropore hydrogen concentration calculation model is established based on the gas sate equation combined with the original micropore hydrogen pressure calculation model. A complex calculation model of micropore hydrogen pressure is given. The micropore defects in heavy forgings can be treated as porous compressible material due to the similar physical property and de-formation characteristics.In light of the forging process of large Cr5 forgings,a non-linear FEA model is proposed for the compaction process of micropore defects and calculation of micropore hydrogen pressure using the rigid-plastic finite element method for com-pressible material in this paper. By means of numerical simulation, the influence on the reduction of the relative density and micro-pore hydrogen pressure is discussed. The results show that 1. the relative density of forgings increases with the enhancement of reduction; 2. there is a threshold concerning the effect of relative density on the micropore hydrogen pressure. The micropore hy-drogen pressure can be effectively regulated by controlling the forgings reduction.关键词
微孔隙/多孔可压缩材料/微孔隙氢压强度/锻造压实/刚塑性有限元方法Key words
micropore/porous compressible material/micropore hydrogen pressure/forging compaction/rigid-plastic FEM分类
矿业与冶金引用本文复制引用
杜凤山,李杰,范俊锴,黄华贵,李源..大型锻件微孔隙氢压场研究[J].燕山大学学报,2013,(6):480-486,7.基金项目
国家自然科学基金资助项目(51075352，51005197) （51075352，51005197）
