SU716767A1

SU716767A1 - Electrolyte for electrochemical working of titanium alloys

Info

Publication number: SU716767A1
Application number: SU782630193A
Authority: SU
Inventors: Наиля Анваровна Амирханова; Риф Акрамович Зарипов; Ольга Максимовна Татаринова; Валерий Николаевич Серавкин
Original assignee: Уфимский авиационный институт им. Орджоникидзе
Priority date: 1978-06-19
Filing date: 1978-06-19
Publication date: 1980-02-25

Description

Изобретение относится к электрохимической’ обработке металлов и может быть использовано для обработки деталей из титановых сплавов.The invention relates to electrochemical ’processing of metals and can be used for processing parts from titanium alloys.

Известны электролиты для электрохимической обработки титановых сплавов на основе водного раствора азотнокислого и хлористого натрия [ 1].Electrolytes are known for the electrochemical treatment of titanium alloys based on an aqueous solution of sodium nitrate and sodium chloride [1].

Однако эти электролиты не обеспечивают высокой производительности процесса. Кроме того, из-за высокого содержания хлористого ' ' натрия происходит наводораживание поверхностного слоя, что снижает их прочностные характеристики. В состав электролита вводят соли йодистоводородной кислоты, дорогие и дефицитные, которые разлагаются на свету, что затрудняет работу с ними.However, these electrolytes do not provide high process performance. In addition, due to the high content of sodium chloride, hydrogenation of the surface layer occurs, which reduces their strength characteristics. Hydrochloric acid salts, expensive and scarce, are decomposed into the electrolyte, which decompose in the light, which makes it difficult to work with them.

Цель изобретения — увеличение производительности и снижение энергоемкости процесса при электрохимической обработке деталей из титановых сплавов.The purpose of the invention is to increase productivity and reduce the energy intensity of the process during electrochemical processing of parts made of titanium alloys.

Для этого в предлагаемый электролит на основе водного раствора нитрата и хлорида натрия дополнительно введен глицерин, причем компоненты взяты в следующем соотношении, вес.%:For this, glycerin is additionally introduced into the proposed electrolyte based on an aqueous solution of sodium nitrate and sodium chloride, the components being taken in the following ratio, wt.%:

Азотнокислый натрий Sodium nitrate 10-15 10-15 Хлористый натрий. Sodium chloride. 0,5-1,0 0.5-1.0 Глицерин Glycerol 1,0-2,0 1.0-2.0 Вода Water Остальное Rest

Титановые сплавы обрабатывают при следующих параметрах: среднее напряжение 5—8 В; скважность 3,5-6,5; частота подачи импульсного тока, синхронизированная с частотой вибрации электрода—инструмента 10—50 Гц.Titanium alloys are processed at the following parameters: average voltage 5-8 V; duty cycle 3.5-6.5; the frequency of supply of the pulsed current, synchronized with the frequency of vibration of the electrode — tool — 10-50 Hz.

Наводораживание титановых сплавов в процессе электрохимической обработки устраняют тем, что в качестве основы электролита берут азотнокислый натрий, а содержание хлористого натрия доводят до минимума. Вводят в электролит глицерин как блескообразователь, т.е. вещество, способствующее повышению вязкости в прианодном слое, этим достигают эффект микровыравнивания. Оптимальное количество глицерина, вводимого в электролит, составляет 1-2 вес.%, так как при меньшем его содержаний нет заметного улучшения качества по/ • / нерхности. а при большем - наблюдается некоторое снижение производительности.The hydrogenation of titanium alloys during the electrochemical treatment is eliminated by the fact that sodium nitrate is taken as the base of the electrolyte, and the content of sodium chloride is minimized. Glycerin is introduced into the electrolyte as a brightener, i.e. a substance that contributes to an increase in viscosity in the anode layer, thereby achieving the effect of micro-alignment. The optimal amount of glycerol introduced into the electrolyte is 1-2 wt.%, Since with a lower content there is no noticeable improvement in the quality of the surface. and with more - there is a slight decrease in performance.

Предлагаемый состав электролита в импульсном режиме позволяет увеличить скорость обработки в 1,5-2 раза и снизить энергоемкость процесса в 2,5 раза при сохранении высокой точности и хорошего качества поверхности.The proposed composition of the electrolyte in a pulsed mode allows you to increase the processing speed by 1.5-2 times and reduce the energy intensity of the process by 2.5 times while maintaining high accuracy and good surface quality.

Кроме того, предлагаемый электролит менее дефицитный, дешевый и более стойкий в употреблении, чем известный электролит. 10In addition, the proposed electrolyte is less scarce, cheaper and more resistant to use than the known electrolyte. 10

Claims

The invention retreats to the electrochemical machining of glasses and can be used to process parts from titanium alloys. Electrolytes are known for electrochemical treatment of titanium alloys based on aqueous solution of sodium nitrate and sodium chloride 1. However, these electrolytes do not provide high efficiency of the process. In addition, due to the high content of sodium chloride, hydrogen absorption of the surface layer occurs, which reduces their strength characteristics. Salts of hydroiodic acid, expensive and scarce, which decompose in the light, are difficult to work with. The purpose of the invention is to increase the productivity and reduce the energy intensity of the process during the electrochemical machining of parts made of titanium alloys. For this, glycerol is additionally introduced into the proposed electrolyte based on an aqueous solution of nitrate and chloride, and the components are taken in the following ratio, wt.%: Sodium nitrate 10-15 Sodium chloride 0.5-1.0 Glycerin, 0-2, 0 WaterEverything. Titanium alloys are treated with the following parameters: average voltage 5-8 V; duty cycle 3,5-6,5; the frequency of the pulse current, synchronized with the vibration frequency of the electrode-HHcip) vieHTa 10-50 Hz. Flooding of Tatan alloys in the process of electrochemical processing is eliminated by that. That sodium nitrate is taken as the electrolyte base and the sodium chloride content is kept to a minimum. Glycerin is introduced into the electrolyte as a brightener, i.e. the viscosity enhancing substance in the near-anode layer makes it possible to effect micro-leveling. The optimal amount of glycerin injected into the electrolyte is 1-2 wt.%, Since with less of its contents there is no noticeable improvement in the quality of the 3,4766 nerbosity. and with a larger one, there is some limited decrease in production. The proposed composition of the electrolyte in the pulse. Sleep mode allows you to increase the processing speed by 1.5-2 times and reduce the energy consumption5 of the process by 2.5 times while maintaining high scrubiness and good surface quality. In addition, a hydrate electrolyte is less defined, cheaper, and more resistant to use than a known electrolyte. The formula was invented and an electrolyte for electrochemical machining of titanium alloys based on aqueous growth; 4 , in order to increase productivity and reduce the process energy, its composition contains glycerin in the following ratio of components, weight: Sodium Nitrate 10-15 Sodium chloride 0.5 - 1.0 Glycerin 1.0-2.0 Water Remaining. Information sources, . taken into account during the examination 1. USSR Copyright Certificate No. 390902, cl. B 23 P 1/16, 1971.