爆炸压实CuCr合金的压实能与压实密度关系的研究

Study on the relationship between compact density and compaction energy of CuCr alloys by explosive compaction

采用机械合金化工艺合成CuCr预合金粉,爆炸压实工艺制备CuCr合金触头材料。重点研究爆炸压实工艺粉末压实密度与粉末压实能之间的关系。结果表明:爆炸压实工艺制备了密度较高(>92％的理论密度)的CuCr合金;随着单位体积粉末压实能增加,无论长管还是短管,粉末压实密度都是先增加后减小,有一个最大值;对于长管,当压实能为365.815MJ/m3时,压实密度达到最大值(98.65％理论密度);对于短管,当压实能为305.502 MJ/m3时,压实密度达到最大值(98.63％,理论密度);并且CuCr合金粉的压实密度与压实能之间关系符合等式C=0.0022E/(1+0.0045E)。

CuCr alloy powders were prepared by mechanical alloying, and CuCr contact materials were made by explosive com-paction. The relationship between compact density and compaction energy were emphatically studied. The results showed that CuCr alloys with higher density (over 92% of theory density) were prepared by explosive compaction. With the rise of compaction energy, compact density of CuCr powders increased first, and then decreased, there was the maximum value whether longer tube or short tube. For longer tube, compact density got the maximum value (98. 65% of theory density) when compaction energy was 365. 815MJ/m3. For shorter tube, compact density got the maximum value (98. 63% of theory density) when compaction energy was 305. 502MJ/m3. The relationship between compact density and compaction energy ac-corded with the equation C=0.0022E/1+0.0045E.