SU944845A1

SU944845A1 - Flux for low-temperature soldering

Info

Publication number: SU944845A1
Application number: SU813230932A
Authority: SU
Inventors: Зинаида Ивановна Починкова; Геннадий Иванович Семенов; Александр Иванович Васильев; Анатолий Дмитриевич Лысенко
Original assignee: Предприятие П/Я Г-4652
Priority date: 1981-01-05
Filing date: 1981-01-05
Publication date: 1982-07-23

Description

(54) ФЛЮС ДЛЯ НИЗКОТЕМПЕРАТУРНОЙ ПАЙКИ(54) FLUSH FOR LOW-TEMPERATURE SOLDERING

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Изобретение относитс к пайке, в частности к флюсам дл низкотемпературной пайки контактных лепестков с алюминиевыми обмоточными проводами , используемыми в различных област х промышленности.The invention relates to soldering, in particular to fluxes for low-temperature soldering of contact lobes with aluminum winding wires used in various industrial fields.

Известен р д флюсов, твердых и жидких, содержащих хлористые, фтористые и борфтористые соединени , предназначенных дл пайки алюминиевых проводов в издели х электронной техники t1 .A number of fluxes, solid and liquid, containing chloride, fluoride and boron fluoride compounds, are known for soldering aluminum wires in electronic products t1.

Наиболее близким по достигаемому результату к изобретению вл етс флюс С2, содержащий, вес.: Фторборат кадми 9-11 Тетрафторборат цинка2,5-3,5The closest in terms of the achieved result to the invention is flux C2, containing, in weight: cadmium fluoroborate, 9-11 zinc tetrafluoroborate, 2.5-3.5

Фторборат аммони , Триэтаноламин Остальное Однако известные флюсы не обеспечивают стабильного качества пайки алюминиевых проводов с контактными латунными лепестками. Кроме того.Ammonium fluoroborate, Triethanolamine Else However, the known fluxes do not provide consistent quality of soldering aluminum wires with contact brass petals. Besides.

ИХ остатки после пайки трудно отмываютс и оказывают большое вли ние на сопротивление изол ции. Флюс, содержащий фторбораты кадми , цинка и аммони очень трудоемок в приготовлении , так как требует растирани компонентов в отдельности, а затем еще при смешивании.Their solder residues are difficult to wash off and have a great influence on the insulation resistance. The flux containing cadmium fluoroborates, zinc and ammonium is very laborious to prepare, as it requires rubbing the components separately, and then also when mixed.

Цель изобретени - повышение активности флюса.The purpose of the invention is to increase the activity of the flux.

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Поставленна цель достигаетс тем, что в известном флюсе, содержащем Триэтаноламин и тетрафторборат цинка, указанные компоненты он содержит в следующем соотношении, вес.:. This goal is achieved by the fact that in the known flux containing Triethanolamine and zinc tetrafluoroborate, these components it contains in the following ratio, wt.:.

Claims

15 Zinc tetrafluoroborate 10-15 Triethanolamine Else This flux provides high-quality stable soldering according to the requirements of OST C G0.05.089, decreases to 2 ° C, has an effect on the insulation resistance, gives small, easily washable residues, is more technological in preparation as it requires grinding in 39-triethanolamine only one component. All the advantages of this flux over the existing ones are due to the fact that it contains an increased amount of zinc tetrafluoroborate. During soldering, zinc tetrafluoroborate penetrates into cracks formed due to the difference in the thermal expansion coefficients of the oxide film and aluminum, interacts with aluminum, disrupting its connection with the oxide film. In addition, the oxide-free aluminum surface is covered with a layer of molten zinc metal, and therefore it is easily wetted with solder. The stability of flux soldering mainly depends on the last moment, i.e. from aluminum coating with zinc. The table presents the composition of fluxes. The specified flux was tested in mass production of power transformers with windings of aluminum wires and showed positive results. The flux provides an increase in the quality of soldering aluminum wires with isolation of its stability and reduction in the time of its preparation. Claims of the invention Flux for low-temperature soldering, predominantly aluminum wires, containing triethanolamine and zinc tetrafluoroborate, characterized in that, in order to increase the flux activity, it contains components in the following ratio, weight: Zinc tetrafluoroborate 10-15 Triethanolamine Remained into account in the examination. 1. Solders and fluxes for soldering. OST k go.033.200. . Lotsmanov S.N. and others. Handbook of the user. M., Mashinostroenie, 1975, p.113 (prototype).