DH型添加剂对水玻璃石英砂铸型与铸钢件界面烧结的影响  

Effects of DH Additives on the Interface Between Sodium Silicate Sand Mould and Steel Casting

作　　者：丁海波[1] 朱世根[1] 骆祎岚[1] 张猛[1] 

机构地区：[1]东华大学机械工程学院纺织装备教育部工程研究中心,上海201620

出　　处：《铸造》2013年第6期541-544,共4页Foundry

摘　　要：通过对水玻璃石英砂铸型与铸件之间界面层进行模拟,并对含DH型添加剂的界面层进行了烧结试验,研究了DH型添加剂对界面层烧结状态及力学性能的影响,并对铸钢件进行实际浇注。结果表明:在水玻璃石英砂中加入适量的DH型添加剂能提高型砂的耐火度,铸造过程中,易在铸型与铸件界面产生适度烧结的烧结层;DH型添加剂可提高浇注前水玻璃石英砂的初始强度以及浇注后界面烧结层的高温强度,降低界面烧结层冷却至室温的强度;并且,这种适度烧结的界面层具有高温塑性、室温脆性的特点。铸钢件浇注试验发现,添加DH型添加剂的水玻璃石英砂铸型和铸件界面产生的适度烧结的烧结层,易剥离,铸件表面光洁。The interface between sodium silicate sand mould and steel casting were simulated, then the interface with DH additives was sintered. The effects of DH additives on the sintering and mechanical properties of the sintered interfaces were investigated. The molding sand composed of sodium silicate sand and DH additives was used in the pouring experiment of steel casting sample. The results show that by adding the DH additives in the sodium silicate sand, the refractoriness of sodium silicate sand were improved, the moderately-sintered layer could be generated much more easily at the interface between sand mould and steel casting. The initial strength of sodium silicate sand and the high temperature strength of the sintered layer were increased, the room temperature strength of the sintered layer was decreased. Besides, the sintered layer had excellent plasticity at high temperature and obvious brittleness at room temperature. The steel casting with high surface quality was obtained after the oeelin~ ofa moderatelv-sintered laver.

关 键 词：DH型添加剂 水玻璃石英砂 界面 烧结 

分 类 号：TG221[金属学及工艺—铸造]