A kind of preparation technology of copper-tin alloy powder with low tin content
A copper-tin alloy and powder preparation technology, which is applied in the field of copper-tin alloy powder processing, can solve the problems of low activity, uneven distribution of Sn content, discounted application effect, etc.
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Embodiment 1
[0028]A low tin content copper tin alloy powder preparation process, the specific method is as follows:
[0029](1) Copper tin powder mixing: It is used to use a precision weighing technique to weigh tin powder from 99.9%, adding 95 wt% purity of no less than 99.9% water atomized copper powder for mixing, mixing ,spare. Among them, the particle size of tin powder is less than 100 μm, and the particle diameter of the copper powder is less than 150 μm.
[0030]It is worth noting that the accuracy of the precision weighing technique of tin powder is controlled between 0.145 to 0.155%.
[0031](2) High energy ball milling: The above mixed uniform copper tin powder and stearic acid are added to the high energy ball mill, and the ball mill is carried out at normal temperature under nitrogen or inert gas, wherein the medium is a cast steel ball for DB5mm, and the material ball ratio is 1:25, the filling coefficient is 0.4, the ball mill is 100 min, and after the ball milling for 40 min, the SDBS-EB...
Embodiment 2
[0037]A low tin content copper tin alloy powder preparation process, the specific method is as follows:
[0038](1) Copper tin powder mixing: It is used to weigh 5% by weight of the purity of no less than 99.9%, adding 95 wt% purity, no less than 99.9% of water atomized copper powder, then joined Polyethylene glycol, added amount of copper tin alloy powder 0.4% by weight, mix well, spare. Among them, the particle size of tin powder is less than 100 μm, and the particle diameter of the copper powder is less than 150 μm. Precision weighing techniques of tin powder are controlled between 0.145 to 0.155%.
[0039](2) High energy ball milling: The preparation process is the same as in the first embodiment, and is specifically referred to in Example 1.
[0040](3) Airflow classification: The preparation process is the same as in the first embodiment, and is specifically referred to in Example 1.
Embodiment 3
[0042]A low tin content copper tin alloy powder preparation process, the specific method is as follows:
[0043](1) Copper tin powder mixed: It is used to weigh tin powder from 0.1% by weight of 0.9% purity, adding 99.9% by weight of water atomized copper powder to 99.9% by weight. Polyethylene glycol was added, and the added amount was 0.2% by weight of the copper tin alloy powder, and the mixture was mixed. Among them, the particle size of tin powder is less than 100 μm, and the particle diameter of the copper powder is less than 150 μm. Precision weighing techniques of tin powder are controlled between 0.145 to 0.155%.
[0044](2) High energy ball milling: The above-mentioned mixed uniform copper tin powder and stearic acid are added to the high energy ball mill, and the ball mill is performed at normal temperature under nitrogen or inert gas, wherein the medium is a cast steel ball of DB10mm, and the material ball ratio is 1:20, the filling coefficient is 0.3, the ball milling time is...
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