D - densify 中文 - EN166

densify vt.(-fied；-fying) 使增加密度。n.-f...

densimeter
As an advanced materials preparation technology , spray - deposition has shown remarkable superiority in producing large - sized alloys and metal matrix composites . however , the spray deposeted preforms usually contain a certain quantity of porosity . besides , the oxide films on the surface of the particles lead to week metallurgic conjunction between the particles . in order to obtain an ideal structure and performance , the porous preforms need further densifying and plastical forming . in this paper , a new technology named wedge pressing was used to densify spray - deposeted 5a06 aluminium alloy , in which the large deformation can be obtained through the sum - up of local deformation and multi - step small deformation . this method can also solved the problems in traditional processing and greatly decreased the producing cost . what ’ s more , the reserch on the wedge pressing desification rules about the large - sized spray deposeted preforms was significant it was vital not only to the further densification of the prefoums but also to the further research on plastical deforming the research was also benefit to the industrialization an the application of the spray deposeted porous materials 坩堝移動式噴射沉積技術作為一種先進的材料制備新技術,在制備大尺寸合金及金屬基復合材料方面具有顯著的優越性。然而噴射沉積坯件特別是大型坯件通常存在一定量的孔隙,顆粒表面存在一定量的氧化膜,顆粒之間未能完全達到良好的冶金結合狀態,因此需要進行后續致密化和塑性變形才能獲得理想的組織和性能。本文采用一種新型的楔形壓制工藝,即通過局部變形、多道次小變形累積實現大變形的致密化加工方法,對噴射沉積多孔坯料進行后續致密化和塑性變形,很好地解決了傳統加工工藝的難題,大大降低了生產成本。
In this dissertation , al - si / sicp composites brake rotor with diameter of 1200mm was firstly fabricated by a novel spray deposition technology , and simultaneously coupled brake pad was prepared by a novel dry - powder processing route , termed as two - step pressing process . a wedge pressing technology was developed to densify the as - produce al - si / sicp composite brake rotor 本文首次采用噴射沉積技術制備了直徑達1200mm的al - si / sicp制動盤,同時采用二次壓制工藝制備出了配套的合成閘片,研究了制動盤的楔壓致密化技術、機理,復合材料摩擦磨損性能及機理。
Cyclic pressing is a new kind of densification processing , which is introduced to densify as - deposited ring of al - 20 % si / sicp . this paper includes the densification result and rule of this technics . the research shows that this technics can be successfully used to densify spray - forming porous material and can be availably adopted to improve mechanical performance and microstructure . this technics is characterized by simple equipment 、 small expense and flexible process , and these characters will make it come true to producing spray - deposited rings less costly 本文采用一種新型致密化工藝?楔壓工藝?對噴射沉積al - 20 % si / sicp大環進行了致密化加工,采用密度硬度分布、抗拉強度變化和檢測顯微組織變化的實驗研究方法對其致密化效果及該工藝規律進行了研究,通過研究表明了楔壓工藝可以成功地用來致密化噴射沉積多孔材料,該工藝有效地提高了噴射沉積大環件的致密度和抗拉強度并改善了組織。
The results show that “ the frame - pack rolling “ technology can increase the densify , avoid cracking during rolling , and effectively improve the deformability and mechanical properties of the spray deposited porous aluminum alloy sheets 結果表明：外框限制軋制工藝提高了噴射沉積多孔材料的致密度，避免了軋制過程中裂紋的形成，有效地改善了噴射沉積板坯的軋制性能及材料的力學性能。
Few of them based on china ' s notorious tabula rasa , many of them try to find new relationships between historical substance and new buildings , others effectively densify carelessly planned extensions 它們中鮮有，其中很多都致力于找到歷史遺存與新建筑的全新關系，另外一些則有效地改善了缺乏規劃的擴建工程。