Brazing of tungsten tin
Buy supplies for soldering tungsten tin offers the company Electrovek-steel. Products are sold at prices from the manufacturer. The supplier provides its delivery to any point specified by the customer.
Features of soldering products from tungsten
Tungsten is a refractory metal: its melting point exceeds 3400 0 C. Tungsten has high heat resistance, which is kept at a sufficient level up to 2700 0 C. At the same time, this metal is very fragile at room temperatures, which imposes certain restrictions on the processes of permanent connection Tungsten with other metals or alloys.
An important feature of tungsten is its active oxidation in the temperature ranges 450… 500 0 С and above. A film of oxide WO 3 is formed on the surface of the metal, which degrades the quality of the subsequent compound. Therefore, before soldering tin, tungsten products are subject to thorough mechanical cleaning and etching. As a pickling reagent, it is necessary to use hydrofluoric acid, nitric acid, as well as mixtures thereof. Immediately after etching, the parts are electrochemically degreased.
The company Electrovek-steel offers to purchase at affordable prices from the manufacturers of tin, as well as consumables needed for successful soldering of tungsten products. The supplier ensures the timely transportation of products to any point specified by the customer.
Technological mode of tungsten soldering
The process of soldering tungsten with tin is desirably carried out in a vacuum to avoid surface oxidation. As a result, the seam turns out to be more dense, and does not contain pores and shells. The heating rate should be maximal, and the connection delay at the soldering temperature is the least.
The following types of solders containing tin are used:
- POC-90 (90% tin content, the rest — lead);
- POS-61 (tin content 61%, the rest — lead);
- ПОСВ-50 or alloy of Rose (the content of tin and lead is 25% each, the rest is bismuth).
After soldering, a secondary melting of the joint is often performed, which increases its thermal stability.
Buy at an affordable price consumables for high-quality soldering tungsten offers the company Elektrovek-steel. Effective prices are from the manufacturer. The supplier guarantees the prompt delivery of products to the address specified by the consumer.