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Hot tinning antioxidant additive and preparation method and application thereof

An anti-oxidant additive and anti-oxidant technology, applied in the field of hot-dip plating, can solve the problems of inability to obtain good anti-oxidation effect, poor anti-oxidation of antimony element, increase production cost, etc., achieve good economic benefits, increase fluidity, and improve utilization rate effect

Inactive Publication Date: 2017-06-27
李明茂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lead is a poisonous element, which has been strictly prohibited in electronic products at home and abroad; aluminum is difficult to melt in tin liquid, and often needs to be mixed in tin ingots in advance, which greatly increases the process and increases production costs; and the antimony of antimony Oxygen is poor, and can not achieve a good antioxidant effect

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  • Hot tinning antioxidant additive and preparation method and application thereof
  • Hot tinning antioxidant additive and preparation method and application thereof
  • Hot tinning antioxidant additive and preparation method and application thereof

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preparation example Construction

[0048] The specific embodiment part of the present invention provides a kind of preparation method of hot-dip tin anti-oxidation additive, and described method comprises the following steps:

[0049] (1) Heat and melt the tin ingot of the formula quantity, then wrap the metal hafnium particles of the formula quantity with tin foil and press them into the tin liquid, and then cover the surface of the tin liquid with charcoal;

[0050] (2) Heating the tin liquid to 1500-1600°C for heat preservation, cooling to 680-720°C after heat preservation, casting out of the furnace, casting the alloy into blocks or granules, and obtaining hot-dip tin anti-oxidation additives.

[0051] The specific embodiment part of the present invention also provides a kind of production technology of copper wire / strip hot tinning, and described technology is specifically:

[0052] Throw tin ingots into a general-purpose tin-melting iron crucible resistance furnace, heat to 250-260°C to melt, add the prep...

Embodiment 1

[0055] Prepare hot-dipping tin antioxidant additives as follows:

[0056] (1) Using an induction furnace as a heating device, put tin ingots with a mass percentage of 98.5% into a graphite crucible and heat and melt them. When the tin liquid reaches 350°C, put a mass percentage of 1.5% of the metal hafnium particles Wrap it with tin foil and press it into the tin liquid, then spread charcoal with a thickness of 10cm on the surface of the tin liquid, and the charcoal particle size is 1cm;

[0057] (2) Increase the heating power, heat the tin liquid to 1560°C, keep it warm for 18 minutes, turn off the heating power after the heat preservation is over, and wait for the tin liquid to cool to 705°C, then cast it out of the furnace, cast the alloy into granules, and obtain a hafnium with a content of 1.5%. Antioxidant additive for hot dip tinning.

[0058] Hot-dip tinning is performed as follows:

[0059] Throw tin ingots into a general-purpose tin-melting iron crucible resistance...

Embodiment 2

[0063] Prepare hot-dipping tin antioxidant additives as follows:

[0064] (1) Using an induction furnace as a heating device, put tin ingots with a mass percentage of 99% into a graphite crucible and heat and melt them. When the tin liquid reaches 350°C, put 1% by mass of hafnium metal particles Wrap it with tin foil and press it into the tin liquid, then spread charcoal with a thickness of 10cm on the surface of the tin liquid, and the charcoal particle size is 1cm;

[0065] (2) Increase the heating power, heat the tin liquid to 1580°C, keep it warm for 16 minutes, turn off the heating power after the heat preservation is over, and wait for the tin liquid to cool to 700°C, then cast it out of the furnace, cast the alloy into granules, and obtain a hafnium with a content of 1%. Antioxidant additive for hot dip tinning.

[0066] Hot-dip tinning is performed as follows:

[0067] Throw tin ingots into a general-purpose tin-melting iron crucible resistance furnace, heat to 250°C...

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Abstract

The invention relates to a hot tinning antioxidant additive and a preparation method and application thereof. The additive comprises the following components in percentage by mass: 95-99% of tin, and 1-5% of hafnium; and the content sum of tin and hafnium in the additive is 100%. The additive is applied to a hot tinning process; in particular, in the copper wire / strip hot tinning, the oxidation of tin liquid can be effectively inhibited, tin slag is reduced, and the utilization rate of tin ingots is increased; and meanwhile, few hafnium elements can increase the fluidity of the tin liquid, so that the wetting performance of a tin plating layer is effectively improved, the strength and the corrosion resistance of the tin plating layer are improved, and the surface quality of plating parts is improved. The antioxidant additive can be applied to the hot tinning, the tin artware preparation and the tin brazing filler metal preparation, and is excellent in application foreground.

Description

technical field [0001] The invention relates to the field of hot-dipping, in particular to an anti-oxidation protection technology for tin melt, and in particular to an antioxidant for hot-dip tin and its preparation method and application. Background technique [0002] Tin-plated round copper wire and tin-plated copper strip are important industrial products, and their production method mainly adopts hot-dip method. / Plating on the belt. [0003] Tin in the molten state is easily oxidized at high temperature, producing a large amount of oxidized slag, resulting in a waste of resources, hindering the operation, increasing the workload, and making the quality of tin products unable to be guaranteed. Especially in the production process of hot-dip tinned copper wire / strip, since the copper wire / strip passes continuously through the molten tin liquid, similar to continuous stirring in the tin liquid, the molten tin liquid is more likely to be oxidized, and the surface A larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/08C22C13/00
CPCC23C2/08C22C13/00
Inventor 李明茂张乐清朱明彪
Owner 李明茂
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