Preparation method for TiC/Ti5Si3 composite enhanced copper-based electrical contact material
An electrical contact material and composite reinforcement technology, applied in the field of metal materials, can solve the problems of poor bonding between the reinforcement phase and the matrix interface, limiting the performance of composite materials, and low density of composite materials, achieving low cost, high hardness, and good stability Effect
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Embodiment 1
[0016] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 83.89%, sponge titanium 5.86%, SiC powder 1.43%, graphite powder 0.82%, copper powder 8%;
[0017] (2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for ball milling for 3 hours, and SiC is refined to submicron level by ball milling, and graphite-coated SiC is obtained Mix powder.
[0018] (3) Preparation of Cu-graphite-coated SiC preform: Mix the graphite-coated SiC mixed powder obtained in step (2) with copper powder, and place it in a ball mill for ball milling for 2 hours to obtain a copper-graphite-coated SiC mixed powder ;Compress the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 15mm;
[0019] (4)TiC...
Embodiment 2
[0022] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 77.25%, sponge titanium 7%, SiC powder 3.57%, graphite powder 0.18%, copper powder 12%;
[0023] (2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for 5 hours, and SiC is refined to submicron by ball milling, and graphite-coated SiC is obtained. Mix powder.
[0024] (3) Preparation of Cu-graphite-coated SiC preform: The graphite-coated SiC mixed powder obtained in (2) was mixed with copper powder, and placed in a ball mill for ball milling for 4 hours to obtain copper-graphite-coated SiC mixed powder. Press the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 25mm;
[0025] (4)TiC / Ti 5 Si 3 Reaction synthesi...
Embodiment 3
[0028] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 87.25%, sponge titanium 5%, SiC powder 1.43%, graphite powder 0.32%, copper powder 8%;
[0029](2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for ball milling for 3 hours, and SiC is refined to submicron level by ball milling, and graphite-coated SiC is obtained Mix powder.
[0030] (3) Preparation of Cu-graphite-coated SiC preform: Mix the graphite-coated SiC mixed powder obtained in step (2) with copper powder, and place it in a ball mill for ball milling for 2 hours to obtain a copper-graphite-coated SiC mixed powder . Press the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 12mm;
[0031] (4)TiC / Ti ...
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