超细铁铜锡磷预合金粉在高铁基金刚石工具中的性能研究
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摘要
通过粉末冶金工艺制备了铁含量在70%～80%之间的金刚石工具胎体试样,研究了化学法生产的超细Fe-Cu-Sn-P预合金粉(添加比例在20%～60%)对高铁基胎体物理性能、机械性能和切割性能的影响。在密度天平、洛氏硬度计、拉伸试验机、扫描电子显微镜上分别测试试样的密度、硬度、抗压强度以及三点弯曲强度、断口形貌。结果表明:添加超细预合金粉有助于提高胎体的压制成型性,在实际生产中,建议添加比例控制在30%～50%;随着超细预合金粉含量的增加,试样的硬度和抗弯强度随之提高,合金粉含量达到50%以后试样的硬度和抗弯强度提高幅度变缓;随着超细预合金粉末含量的增加,胎体的烧结温度随之降低,其中A5的烧结温度比A1的烧结温度降低35℃;超细预合金粉末含量达到40%以后锯片切割五莲红的锋利度得到了明显提升。
The diamond tool matrix samples with the Fe content between 70%～80% were prepared through powder metallurgy process. Effect of the ultrafine Fe-Cu-Sn-P pre-alloyed powder(the adding proportion of 20%～60%) produced by chemical method was studied, on the physical properties, mechanical properties and cutting properties of rich-iron based matrix. The density, hardness, compressive strength, three-point bending strength, and fracture morphology of the samples were tested by density balance, Rockwell hardness tester, tensile tester, and scanning electron microscope respectively. The results showed that the addition of ultrafine pre-alloyed powder could improve the press formability of the matrix. In practical production, the proportion was recommended to be 30%～50%. With the increase of the content of ultrafine pre-alloyed powder, the hardness and bending strength of the sample increased. When the content of the alloy powder was beyond 50%, the rising tendency of hardness and bending strength became slow. As the content of the ultrafine pre-alloyed powder increased, the sintering temperature of the matrix decreased. The sintering temperature of A5 sample was lower than that of A1 by 35℃. When the content of the ultrafine pre-alloyed powder reached up to 40%, the sharpness of saw blade cutting the granite of Wulianhong was obviously improved.
The diamond tool matrix samples with the Fe content between 70%～80% were prepared through powder metallurgy process. Effect of the ultrafine Fe-Cu-Sn-P pre-alloyed powder(the adding proportion of 20%～60%) produced by chemical method was studied, on the physical properties, mechanical properties and cutting properties of rich-iron based matrix. The density, hardness, compressive strength, three-point bending strength, and fracture morphology of the samples were tested by density balance, Rockwell hardness tester, tensile tester, and scanning electron microscope respectively. The results showed that the addition of ultrafine pre-alloyed powder could improve the press formability of the matrix. In practical production, the proportion was recommended to be 30%～50%. With the increase of the content of ultrafine pre-alloyed powder, the hardness and bending strength of the sample increased. When the content of the alloy powder was beyond 50%, the rising tendency of hardness and bending strength became slow. As the content of the ultrafine pre-alloyed powder increased, the sintering temperature of the matrix decreased. The sintering temperature of A5 sample was lower than that of A1 by 35℃. When the content of the ultrafine pre-alloyed powder reached up to 40%, the sharpness of saw blade cutting the granite of Wulianhong was obviously improved.
引文
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[2] 宋尚德.草酸盐共沉淀法制备金刚石金属结合剂[D].郑州大学硕士学位论文,2006:9-10.
[3] 戴秋莲.稀土添加剂对铁基金刚石复合材料性能影响的研究[D].华侨大学博士学位论文,2003:3-4.
[4] 黄培云.粉末冶金原理[M].北京:冶金工业出版社,2004:132-133.
[5] 陈霞,李晨辉.金刚石圆锯片用铁基结合剂的研究[J]. 金刚石与磨料磨具工程, 1999(1): 25.
[6] 肖俊玲,胡国程,丘定辉. 金刚石工具铁基结合剂的应用及展望[J]. 湖南有色金属, 2002,18(1):29-31.