可溶填充剂对孔隙自生成超硬磨料磨具孔隙生成的影响  

Influence of Soluble Filler on Pores Self-generation Superabrasive Tool

作　　者：吕冰海[1] 董晨晨[1] 邓乾发[1] 袁巨龙[1] 范红伟[1] 吴喆[1] 

机构地区：[1]浙江工业大学超精密加工研究中心,杭州310014

出　　处：《机械工程学报》2014年第15期172-179,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51175166);浙江省自然科学基金重点(LZ12E05001);浙江省科技计划(2013C31014)资助项目

摘　　要：针对金属结合剂超硬磨料磨具结合剂密实、难修整、容易堵塞(容屑空间小)的问题,提出一种孔隙自生成超硬磨料磨具加工技术:在金属结合剂中添加'可溶'填充剂,加工过程中利用特定溶液溶解磨具表层的'可溶'填充剂,从而在磨具表层形成类似多孔金属的孔隙结构,以提供容屑空间、并增强磨具自锐性。分析了Zn、CaO和SiO2三种'可溶'填充剂'溶解'过程,以及填充剂对磨具整体强度的影响;制备?20 mm×5 mm青铜结合剂孔隙自生成金刚石丸片试样,进行孔隙生成观察试验以及加工试验,研究孔隙自生成磨具的自锐过程。结果表明,'可溶'填充剂Zn在不明显降低磨具力学特性的前提下,具有较好的孔隙生成效果,从而提高磨具自锐性、减轻磨具表面的堵塞现象和提高材料去除率。To overcome the great difficulties in dressing and the small space for chips, the natural problems of the traditional metal bonded superhard abrasive tool, pores selfgeneration superabrasive tool （PSSAT） is proposed. The fillers added in the metal binder of the PSSAT can be ＇dissolved＇ by certain solution in the machining process, and porous structure, which is benefit to the self-sharpening and the increasing of chip space, can be generated on the tool surface layer. The dissolution of three soluble fillers Zn, CaO, SiO2 are analyzed, and the influence of the fillers on the strength of PSSAT is also investigated. PSSAT pellets with dimension φ20 mm x 5 mm are used in experiments to investigate the pore-generating and self-sharpening process. Results show that the filler Zn is the best one for pores self-generation without obvious decline of the tool strength. As a result, the self-sharpening of the abrasive tool and material removal rate are improved with decrease of the j am on tool surface.

关 键 词：超硬磨料磨具 金属结合剂 孔隙自生成“可溶”填充剂 

分 类 号：TG156[金属学及工艺—热处理]