| 1. | Influence of preparation technology on structure and properties of cu - ag alloy in situ composites
合金原位复合材料结构与性能的影响 |
| 2. | The microstructure and properties of ticp / fe in situ composites could be changed obviously by different heat treatments , however the shape , dimension and quantity of the tic reinforcement could n ' t be changed
通过不同的热处理工艺可明显改变原位tic _ p fe复合材料的基体组织，但不改变tic增强相的形态、尺寸及数量。 |
| 3. | Carbonyl iron particles and iron - epoxy resin composite particles , which both mrs and microwave absorber are based on , were prepared by method of dropping fe ( co ) 5 to dmf in constant temperatures and of heating the solution of fe ( co ) 5 / dmf stage by stage , combining in situ composite technique
本论文采用恒温滴加法和逐步升温液相法热分解合成了羰基铁粒子，并结合原位聚合复合技术制备了羰基铁-环氧树脂复合粒子，然后用它们组成了磁流变液和微波吸收材料。 |
| 4. | It costs more than the traditional way and it is hard to control the process of the reaction . these disadvantages have led to some limitations of the composites " production and research . therefore , the developing orientation of in situ composites is to search the means of lowering the cost and controlli ng the process of in situ reaction
但外加法存在着诸如颗粒偏聚、润湿性差、界面强度结合低等缺点，而内生法由于增强颗粒是在基体内部原位反应生成，因此能克服外加法的缺点，但同时内生法所制备的金属基复合材料的成本太高、原位反应不易控制等缺点制约了复合材料的扩大应用，因此发展性能优异复合材料的出路在于寻找降低成本以及控制原位反应的措施。 |
| 5. | Annealing could reduce hardness and raise toughness , which could be prone to mechanical machining . quenching and low temperature tempering could raise intensity and hardness of materials , not reduce toughness obviously . quenching on same temperature caused ticp / fe in situ composites having the best integral machine properties
退火处理使材料的硬度降低，韧性提高，便于机械加工；淬火+低温回火处理使材料的强度和硬度提高，而韧性无明显的降低；采用等温淬火工艺，可使tic _ p fe复合材料具有最好的综合机械性能。 |
| 6. | On the condition of the test , the cutting force of ticp / fe composites was more than which of 45 steel by 60n , and the cutting temperature was higher than which of 45 # steel by 90 , and the roughness of machined surface was almost as much as which of 45 # steel . tic ceramic particles enhanced the cutting force and the cutting temperature of ticp / fe composites , but had little effect on the roughness of machined surface . the machining quality of ticp / fe in situ composite was similarity to 45 # steel
在本试验条件下，原位tic _ p fe复合材料切削加工时的切削力与45 ~ #钢相比要大60n ，切削温度要高90 ，加工表面粗糙度与45 ~ #钢相近； tic陶瓷颗粒使原位tic _ p fe复合材料切削加工时的切削力增大、切削温度增高，对加工表面粗糙度影响不大；原位tic _ p fe复合材料的可加工性与45 ~ #钢相当。 |
| 7. | The welding line microstructure of ticp / fe in situ composites gained by different welding technologies and welding methods was different . however the microstructure was diffused on the welding line and there were no welding defects , the welding quality was better . the tic reinforced particles on the welding line still kept the same shape as that of the casting microstructure
原位tic _ p fe复合材料采用不同焊接工艺和焊接方法所得的焊缝组织有所差别，但焊缝处的组织均匀，没有裂纹等焊接缺陷产生，可焊性较好；焊缝处的tic增强颗粒仍保持铸态组织中tic增强颗粒的形态。 |
