碳化硼在金刚石锯片烧结中的应用研究

【作者】 姚磊；

【导师】 陈玉强；

【作者基本信息】 牡丹江师范学院 ， 凝聚态物理， 2011， 硕士

【摘要】 金刚石工具胎体的性能是影响金刚石工具切割性能的关键因素。因此,采用合适的工艺方法或调节胎体材料的性能,对于稳定和提高金刚石工具的质量具有特殊的意义。本文在深入研究金刚石锯片烧结工艺的基础上,将碳化硼用于金刚石锯片烧结中,探索碳化硼对金刚石锯片的机械性能和胎体的组织形貌的影响。选择掺入碳化硼浓度、成型压力、烧结温度作为影响金刚石锯片机械性能的工艺参数,选择切割速度和锯片寿命比作为检测指标,设计了正交实验方案,为多变量影响掺碳化硼锯片烧结工艺参数的研究提供了数据支持,并对实验结果进行了分析,研究结果表明:(1)碳化硼在胎体中起到了骨架元素的作用,因其比铁等骨架元素更耐高温、耐磨等优良性能,使得胎体的耐磨性能进一步提高。(2)碳化硼和其中的游离态单质可以通过直接作用或间接作用达到改善金属胎体烧结性能、促进金属胎体与金刚石之间界面反应的目的,使得金属胎体与金刚石复合材料的界面结合性能得到提高;对胎体合金起到组织均匀、细化的作用,也有利于强化胎体合金与金刚石颗粒之间的黏结。(3)掺入碳化硼的金刚石锯片胎体对金刚石的把持力有所提高,随着掺入碳化硼浓度的增大把持力也相应增大。(4)在切割条件相同的条件下,掺碳化硼锯片的切割速度均快于未掺碳化硼锯片,随着掺入碳化硼浓度的增大切割速度相应加快。(5)在切割相同的长度后,掺碳化硼金刚石锯片的磨耗比较小,相对于未掺碳化硼锯片寿命明显提高,随掺入碳化硼的浓度增大寿命延长。更多还原

【Abstract】 The property of the diamond tools carcass is the key factor that influences the cutting nature of diamond. Therefore, the proper technique or the body material adjustment exerts a special impact on the stability and improvement of the diamond quality. Thus, based on the in-depth analysis of the diamond saw blade agglutination craft, this presented thesis is inclined to investigate the influence of the boron carbide on the mechanical capacity of diamond saw and the organization morphology of the tire.In this thesis, the boron carbide density, molding pressure and agglutination temperatures are chosen as the technological parameters that influence the diamond saw blade mechanical property; meanwhile, the cutting speed and saw blade life are taken as the examination target as well as the experimental plan is devised, all of which provide the data support for the sintering process parameters. To conclude, the experimental research is fully analyzed and the result can be given as follows:(1) As more heat-resisting and more wear resistant, the boron carbide played the skeleton element role in the carcass of tire, which further strengthen the property of the tire resistance.(2) Through the direct or indirect action, boron carbide and its free state simple substance can improve the tire agglutination performance and stimulate the interface reaction between the metal tire and diamond, which can further improve the binding ability between the surface of them on one hand; on the other hand, these materials can even and refine the tire alloy, which is useful for consolidating the adhesion of tire alloy and diamond.(3) The holding force of diamond is strengthened by the adding boron carbide diamond saw blade tire body of diamond, and the force increases correspondingly with the growth of the carbonization boron density(4) Under the same condition of cutting, the cutting speed of the mixed carbonization boron saw blade is faster than that of un-mixed, and the speed will be quicker correspondingly with the increasing of the carbonization boron density.(5) After cutting the same length, the abrasion of the mixed boron carbide diamond is relatively small and the life span is extended correspondingly with the increasing of the carbonization boron density.更多还原