Lead-free solder for micro alloyed eutectic alloy of stannum and zinc
A technology of micro-alloying and eutectic alloy, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of easy oxidation of liquid alloy surface, difficult removal of oxide film, poor wettability, etc., to achieve convenient Large-scale production organization and production process control, production organization and recycling are convenient and easy to stabilize the effect
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[0028] Example 1
[0029] The prepared Sn, Zn, Sn-10Ge metal and alloy raw materials are prepared according to the Sn-8.8Zn-0.08Ge composition formula to prepare 500g alloy material, and the alloy is smelted under the protection of argon in a resistance furnace. The order of alloy addition is Sn, Zn , Sn-10Ge, the alloy is completely melted and kept at 400°C for 30min to ensure the uniformity of the composition and reduce the heating power. When the solder melt temperature drops to 250°C, start pouring into the preheated stainless steel mold.
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[0030] Example 8
[0031] Put the prepared Sn, Zn, Ga, Sn-10Ge, Sn-10Al, Sn-5Ni and Sn-5P metal and alloy raw materials according to Sn-8.7Zn-0.03Ga--0.015Ge-0.01Al-0.006P-0.04 Ni composition formula is used to prepare 500g alloy material, and the alloy is smelted under the protection of argon in a resistance furnace. The order of alloy addition is Sn, Zn, Sn-10Ge, Sn-5Ni, Sn-10Al, Sn-5P, Ga, and all the alloys are melted. After that, keep it at 400°C for 30min to ensure the uniformity of the composition and reduce the heating power. When the temperature of the solder melt drops to 250°C, start pouring into the preheated stainless steel mold.
[0032] Other examples and comparative examples were prepared in the same manner as the above examples 1 and 8, and their chemical components are shown in Table 1.
[0033] The alloy of the present invention can be prepared into master alloy blanks, welding rods, welding wires, solder balls and solder powder. The specific preparation process...
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